In Louisiana: 165 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Jan 1, 2030 (404 limits); 63 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.

By state: all · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1

Plant	Permit	State	Type	Design flow	Parameter	New limit	Effective	Today's median	× limit
TOWN OF MAURICE - SOUTH WWTP	LA0127202	LA	Sewage plant	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2027	1.05 mg/L (9 values)	31.8×
Town of Maurice- Maurice WTP	LA0038393	LA	Sewage plant	.09 MGD	Chlorine, total residual	instantaneous maximum 0.039 mg/L, new	Jan 1, 2027	1.08 mg/L (9 values)	27.7×
ARNAUDVILLE, TOWN OF	LA0046639	LA	Sewage plant	.36 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Mar 1, 2027	0.27 mg/L (9 values)	8.18×
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	BOD, 5-day, 20 deg. C	monthly average 10 mg/L, tighter	Apr 1, 2027	13.9 mg/L (11 values)	1.39×
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	Solids, total suspended	monthly average 15 mg/L, tighter	Apr 1, 2027	18.8 mg/L (11 values)	1.25×
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	BOD, 5-day, 20 deg. C	monthly average 33 lb/d, tighter	Apr 1, 2027	39 lb/d (11 values)	1.18×
NATIONAL WATER INFRASTRUCTURE, LLC - SEVEN OAKS FLEA MARKET	LA0122505	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	May 1, 2027	5 mg/L (9 values)	152×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0126136	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.044 mg/L, new	May 1, 2027	5.7 mg/L (9 values)	130×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0126136	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.044 mg/L, new	May 1, 2027	5.5 mg/L (9 values)	125×
Plaquemines Parish Government- Parish Government Complex STP	LA0126098	LA	Sewage plant	.1 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	May 1, 2027	3.37 mg/L (9 values)	102×
NATIONAL WATER INFRASTRUCTURE, LLC - SEVEN OAKS FLEA MARKET	LA0122505	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	May 1, 2027	3 mg/L (9 values)	90.9×
CITY OF BATON ROUGE/PARISH OF EAST BATON ROUGE- LAKE JOLIE VUE SUBD. #306	LA0127754	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jul 1, 2027	2.2 mg/L (9 values)	66.7×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0126225	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jul 1, 2027	1.22 mg/L (9 values)	37×
CITY OF BATON ROUGE/PARISH OF EAST BATON ROUGE- LAKE JOLIE VUE SUBD. #306	LA0127754	LA	Industrial	—	Solids, total suspended	weekly average 23 mg/L, tighter	Jul 1, 2027	32 mg/L (9 values)	1.39×
CITY OF BATON ROUGE/PARISH OF EAST BATON ROUGE- LAKE JOLIE VUE SUBD. #306	LA0127754	LA	Industrial	—	Solids, total suspended	monthly average 15 mg/L, tighter	Jul 1, 2027	20.65 mg/L (9 values)	1.38×
CITY OF BATON ROUGE/PARISH OF EAST BATON ROUGE- LAKE JOLIE VUE SUBD. #306	LA0127754	LA	Industrial	—	BOD, 5-day, 20 deg. C	monthly average 10 mg/L, tighter	Jul 1, 2027	11.75 mg/L (9 values)	1.18×
TOWN OF PEARL RIVER MUNICIPAL	LA0075329	LA	Sewage plant	.33 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Aug 1, 2027	5.8 mg/L (9 values)	176×
WEST BATON ROUGE PARISH	LA0068501	LA	Sewage plant	.3 MGD	Chlorine, total residual	instantaneous maximum 0.3 mg/L, new	Aug 1, 2027	1.62 mg/L (9 values)	5.4×
SABINE PARISH POLICE JURY	LA0070904	LA	Sewage plant, major	—	Phenolics, total recoverable	monthly average 0.005 mg/L, new	Sep 1, 2027	0.007 mg/L (3 values)	1.4×
DUSON, TOWN OF	LA0055085	LA	Sewage plant	.215 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2027	1.25 mg/L (9 values)	37.9×
TOWN OF KINDER	LA0020605	LA	Sewage plant	.97 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2027	0.74 mg/L (9 values)	22.4×
WASHINGTON PARISH GOVERNMENT	LA0068101	LA	Sewage plant	—	Solids, total dissolved	monthly average 496 mg/L, new	Oct 1, 2027	2560 mg/L (3 values)	5.16×
WASHINGTON PARISH GOVERNMENT	LA0068101	LA	Sewage plant	—	Solids, total dissolved	daily maximum 1181 mg/L, new	Oct 1, 2027	2560 mg/L (3 values)	2.17×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0073148	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Nov 1, 2027	1.64 mg/L (9 values)	49.7×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0124265	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.66 mg/L, new	Nov 1, 2027	4.6 mg/L (9 values)	6.97×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0072265	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2028	2.2 mg/L (10 values)	66.7×
BALL, TOWN OF	LA0079545	LA	Sewage plant	.75 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2028	0.61 mg/L (9 values)	18.5×
NATIONAL WATER INFRASTRUCTURE, LLC - OLE HOMESTEAD/KEYSTONE WWTP	LA0126802	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Feb 1, 2028	3 mg/L (9 values)	90.9×
CITY OF BATON ROUGE/PARISH OF EBR - PLEASANT PARK SUBDIVISION #357	LA0127763	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Feb 1, 2028	2.2 mg/L (9 values)	66.7×
CADDO PARISH SEWERAGE DISTRICT #7	LA0097276	LA	Sewage plant	.45 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L, tighter	Apr 15, 2028	40.5 mg/L (11 values)	40.5×
CADDO PARISH SEWERAGE DISTRICT #7	LA0097276	LA	Sewage plant	.45 MGD	Nitrogen, ammonia total [as N]	weekly average 2.5 mg/L, tighter	Apr 15, 2028	41.7 mg/L (11 values)	16.7×
CADDO PARISH SEWERAGE DISTRICT #7	LA0097276	LA	Sewage plant	.45 MGD	Nitrogen, ammonia total [as N]	monthly average 6 lb/d, tighter	Apr 15, 2028	52.3 lb/d (11 values)	8.72×
PLAIN DEALING, TOWN-WWTP	LA0020044	LA	Sewage plant	.35 MGD	Nitrogen, ammonia total [as N]	monthly average 1.5 mg/L, new	Apr 15, 2028	2.27 mg/L (11 values, 4 below detection)	1.51×
LA DEPT OF PUBLIC SAFETY & CORRECTIONS	LA0095273	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 3 mg/L, tighter	Apr 15, 2028	3.608 mg/L (9 values)	1.2×
Morse Village of - STP	LA0064572	LA	Sewage plant	.22 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	May 1, 2028	8.8 mg/L (9 values)	267×
VILLAGE OF NAPOLEONVILLE	LA0043966	LA	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	monthly average 0.4 mg/L, tighter	May 1, 2028	0.906 mg/L (9 values)	2.27×
VILLAGE OF NAPOLEONVILLE	LA0043966	LA	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	weekly average 0.9 mg/L, tighter	May 1, 2028	1.2 mg/L (9 values)	1.33×
RAYVILLE, TOWN OF	LA0020559	LA	Sewage plant, major	1.496 MGD	Nitrogen, ammonia total [as N]	monthly average 16.5 lb/d, tighter	Jun 1, 2028	21 lb/d (11 values)	1.27×
TOWN OF URANIA	LA0040991	LA	Sewage plant	.28 MGD	Nitrogen, ammonia total [as N]	monthly average 3.5 mg/L, new	Jun 30, 2028	24 mg/L (9 values)	6.86×
TOWN OF URANIA	LA0040991	LA	Sewage plant	.28 MGD	Nitrogen, ammonia total [as N]	monthly average 10.1 lb/d, new	Jun 30, 2028	35 lb/d (9 values)	3.47×
TOWN OF URANIA	LA0040991	LA	Sewage plant	.28 MGD	Nitrogen, ammonia total [as N]	weekly average 8.2 mg/L, new	Jun 30, 2028	28 mg/L (9 values)	3.41×
Town of Farmerville- Farmerville WWTP	LA0039888	LA	Sewage plant	.88 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L, tighter	Jul 1, 2028	2.895 mg/L (10 values)	2.07×
Town of Farmerville- Farmerville WWTP	LA0039888	LA	Sewage plant	.88 MGD	Nitrogen, ammonia total [as N]	weekly average 3.3 mg/L, tighter	Jul 1, 2028	4.855 mg/L (10 values)	1.47×
Town of Farmerville- Farmerville WWTP	LA0039888	LA	Sewage plant	.88 MGD	Nitrogen, ammonia total [as N]	monthly average 10.1 lb/d, tighter	Jul 1, 2028	10.87 lb/d (10 values)	1.08×
ST. MARY PARISH WATER & SEWER COMMISSION #3	LA0065552	LA	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	monthly average 1.7 mg/L, new	Jul 15, 2028	7.86 mg/L (9 values)	4.62×
ST. MARY PARISH WATER & SEWER COMMISSION #3	LA0065552	LA	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	weekly average 3.9 mg/L, new	Jul 15, 2028	8.13 mg/L (9 values)	2.08×
ST. MARY PARISH WATER & SEWER COMMISSION #3	LA0065552	LA	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	monthly average 4.8 lb/d, new	Jul 15, 2028	8.974 lb/d (9 values)	1.87×
Kentwood Town of - Sewerage Wastewater Treatment Facility	LA0046051	LA	Sewage plant	.7 MGD	Chlorine, total residual	instantaneous maximum 0.072 mg/L, new	Aug 1, 2028	5.5 mg/L (9 values)	76.4×
Thibodaux City of - North Thibodaux WWTP	LA0127208	LA	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	monthly average 1.1 mg/L, new	Aug 1, 2028	2.955 mg/L (12 values)	2.69×
TOWN OF MORGANZA	LA0020028	LA	Sewage plant	.235 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L, new	Aug 1, 2028	2.2 mg/L (11 values)	1.38×
Thibodaux City of - North Thibodaux WWTP	LA0127208	LA	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	monthly average 13.8 lb/d, new	Aug 1, 2028	14.5 lb/d (12 values)	1.05×
TOWN OF JONESBORO	LA0038547	LA	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	monthly average 2.4 mg/L, new	Sep 1, 2028	12.4 mg/L (9 values)	5.17×
TOWN OF JONESBORO	LA0038547	LA	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	monthly average 6.1 lb/d, new	Sep 1, 2028	15.4 lb/d (9 values)	2.52×
TOWN OF JONESBORO	LA0038547	LA	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	weekly average 5.5 mg/L, new	Sep 1, 2028	12.4 mg/L (9 values)	2.25×
TOWN OF SIBLEY	LA0075396	LA	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	monthly average 2.6 mg/L, new	Sep 1, 2028	3.5 mg/L (9 values)	1.35×
National Water Infrastructure LLC - Meadow Ridge Subdivision STP	LA0124753	LA	Industrial	.2088 MGD	Chlorine, total residual	daily maximum 0.033 mg/L, new	Oct 1, 2028	4 mg/L (9 values)	121×
Magnolia Water Utility Operating Company LLC - Ile Des Cannes	LA0074781	LA	Industrial	.275 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2028	2.2 mg/L (9 values)	66.7×
Magnolia Water Utility Operating Company LLC - Quail Hollow Subdivision	LA0078247	LA	Industrial	.1236 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2028	2.2 mg/L (10 values)	66.7×
Magnolia Water Utility Operating Company LLC - Sawgrass Subdivision & Sawgrass P	LA0126857	LA	Industrial	.0556 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2028	2.2 mg/L (10 values)	66.7×
National Water Infrastructure LLC - High Plains Crossing WWTP	LA0126920	LA	Industrial	.1104 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2028	2 mg/L (9 values)	60.6×
Iota Town of - WWTP	LA0040142	LA	Sewage plant	.8 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2028	1.48 mg/L (5 values)	44.8×
Dubach Town of - Municipal WWTF	LA0063037	LA	Sewage plant	.1375 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2028	1.205 mg/L (10 values)	36.5×
HESSMER, VILLAGE OF	LA0046469	LA	Sewage plant	.086 MGD	Nitrogen, ammonia total [as N]	monthly average 2.1 mg/L (Jan, Feb, Mar, Nov, Dec), tighter	Oct 1, 2028	2.55 mg/L (5 values, 2 below detection)	1.21×
Magnolia Water Utility Operating Company LLC - Jackson Square	LA0078263	LA	Industrial	.13484 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Nov 1, 2028	2.2 mg/L (8 values)	66.7×
Grant Parish Police Jury - South Grant Wastewater Treatment Plant	LA0127205	LA	Sewage plant	.255 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Nov 1, 2028	1.225 mg/L (8 values)	37.1×
Southern Pointe Land LLC - Southern Pointe Land Mobile Home Park	LA0127247	LA	Industrial	.084 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Nov 1, 2028	1.03 mg/L (7 values)	31.2×
Crowley City of	LA0041254	LA	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	monthly average 0.8 mg/L, tighter	Nov 1, 2028	2.93 mg/L (11 values)	3.66×
Crowley City of	LA0041254	LA	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	weekly average 2.1 mg/L, tighter	Nov 1, 2028	4.47 mg/L (11 values)	2.13×
Crowley City of	LA0041254	LA	Sewage plant, major	3.5 MGD	Nitrogen, ammonia total [as N]	monthly average 24 lb/d, tighter	Nov 1, 2028	45 lb/d (11 values)	1.87×
Albany Town of - Albany Wastewater Treatment Works	LA0083810	LA	Sewage plant	.1 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Nov 1, 2028	0.04 mg/L (6 values)	1.21×
Newellton Town of - Town of Newellton WWTP	LA0020095	LA	Sewage plant	.72 MGD	Nitrogen, ammonia total [as N]	monthly average 0.1 mg/L, tighter	Dec 1, 2028	4.16 mg/L (5 values, 1 below detection)	41.6×
Newellton Town of - Town of Newellton WWTP	LA0020095	LA	Sewage plant	.72 MGD	Nitrogen, ammonia total [as N]	weekly average 0.4 mg/L, tighter	Dec 1, 2028	4.43 mg/L (5 values, 1 below detection)	11.1×
Newellton Town of - Town of Newellton WWTP	LA0020095	LA	Sewage plant	.72 MGD	Nitrogen, ammonia total [as N]	monthly average 0.7 lb/d, tighter	Dec 1, 2028	0.83 lb/d (5 values)	1.19×
Utilities Inc of Louisiana - Quail Ridge Wastewater Treatment Plant	LA0065731	LA	Industrial	.075 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2029	3.05 mg/L (8 values)	92.4×
Port Barre Town of - WWTP	LA0020419	LA	Sewage plant	.5 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2029	1.015 mg/L (6 values)	30.8×
Sunset Town of - WWTP	LA0038628	LA	Sewage plant	.36 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2029	0.22 mg/L (6 values)	6.67×
Jackson Town of - Municipal Sewage Treatment Facility	LA0078816	LA	Sewage plant	.439 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2029	0.205 mg/L (6 values)	6.21×
Iowa Town of SD #1	LA0043605	LA	Sewage plant	.5 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Feb 1, 2029	2.97 mg/L (5 values)	90×
Washington Town of - STP	LA0062928	LA	Sewage plant	.15 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Feb 1, 2029	1.05 mg/L (4 values)	31.8×
Iowa Town of SD #1	LA0043605	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 4.2 mg/L, tighter	Feb 1, 2029	5.43 mg/L (11 values, 2 below detection)	1.29×
Iowa Town of SD #1	LA0043605	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	weekly average 7.6 mg/L, tighter	Feb 1, 2029	9.58 mg/L (11 values, 2 below detection)	1.26×
National Water Infrastructure LLC - Bayou Grand Wastewater Treatment Plant	LA0078557	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Mar 1, 2029	3 mg/L (4 values)	90.9×
LADPSC - Raymond Laborde Correctional Center	LA0083801	LA	Sewage plant	.3252 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Mar 1, 2029	2.565 mg/L (4 values)	77.7×
Chatham Town of - Wastewater Treatment Facility	LA0049905	LA	Sewage plant	.1 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Apr 1, 2029	1 mg/L (3 values)	30.3×
Brusly Town of	LA0068241	LA	Sewage plant	.7 MGD	Nitrogen, ammonia total [as N]	weekly average 2.8 mg/L, tighter	Apr 1, 2029	3.8 mg/L (9 values, 2 below detection)	1.36×
Brusly Town of	LA0068241	LA	Sewage plant	.7 MGD	Nitrogen, ammonia total [as N]	monthly average 2.8 mg/L, tighter	Apr 1, 2029	3.67 mg/L (9 values, 2 below detection)	1.31×
Caddo Parish Sewerage District #2	LA0020320	LA	Sewage plant	.25 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	May 1, 2029	2.42 mg/L (3 values)	73.3×
OAKDALE, CITY OF	LA0033430	LA	Sewage plant, major	.79 MGD	Nitrogen, ammonia total [as N]	monthly average 3.1 mg/L, tighter	Aug 1, 2029	6.01 mg/L (11 values)	1.94×
OAKDALE, CITY OF	LA0033430	LA	Sewage plant, major	.79 MGD	Nitrogen, ammonia total [as N]	weekly average 7.4 mg/L, tighter	Aug 1, 2029	8.08 mg/L (11 values)	1.09×
GOLDEN RANCH FARMS, LLC - C-STAR RANCH SITE 2	LA0127760	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3.1 mg/L, tighter	Sep 1, 2029	3.68 mg/L (3 values)	1.19×
Coushatta Town of - WWTP	LA0033243	LA	Sewage plant	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Jan 1, 2030	0.08 mg/L (7 values)	2.42×
NATIONAL WATER INFRASTRUCTURE, LLC - RENAISSANCE SUBDIVISION	LA0127178	LA	Industrial	—	Chlorine, total residual	daily maximum 0.033 mg/L, new	Jan 15, 2027	under 3 values	—
Livingston Parish Sewer District #1 & #2 - Lockhart POTW	LA0067784	LA	Sewage plant, major	4.25 MGD	Lead, total [as Pb]	daily maximum 0.08 lb/d, new	Feb 1, 2027	under 3 values	—
Livingston Parish Sewer District #1 & #2 - Lockhart POTW	LA0067784	LA	Sewage plant, major	4.25 MGD	Lead, total [as Pb]	monthly average 0.04 lb/d, new	Feb 1, 2027	under 3 values	—
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	Solids, total suspended	monthly average 50 lb/d, tighter	Apr 1, 2027	47.7 lb/d (11 values)	0.954×
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	BOD, 5-day, 20 deg. C	weekly average 15 mg/L, tighter	Apr 1, 2027	13.9 mg/L (11 values)	0.927×
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	Solids, total suspended	weekly average 23 mg/L, tighter	Apr 1, 2027	18.3 mg/L (11 values)	0.796×
TOWN OF LOGANSPORT	LA0033308	LA	Sewage plant	.4 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Apr 1, 2027	0 mg/L (10 values)	0×
TOWN OF MANGHAM	LA0032115	LA	Sewage plant	.0643 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	May 1, 2027	0.03 mg/L (10 values)	0.909×
CITY OF BATON ROUGE/PARISH OF EAST BATON ROUGE- LAKE JOLIE VUE SUBD. #306	LA0127754	LA	Industrial	—	BOD, 5-day, 20 deg. C	weekly average 15 mg/L, tighter	Jul 1, 2027	12.3 mg/L (9 values)	0.82×
EGAN WATER CORPORATION	LA0125806	LA	Industrial	—	Solids, total dissolved	monthly average 7870 mg/L, new	Jul 1, 2027	632 mg/L (3 values)	0.0803×
EGAN WATER CORPORATION	LA0125806	LA	Industrial	—	Solids, total dissolved	daily maximum 18731 mg/L, new	Jul 1, 2027	632 mg/L (3 values)	0.0337×
OAKDALE, CITY OF	LA0033430	LA	Sewage plant, major	.79 MGD	Cadmium, total [as Cd]	monthly average 0.02 lb/d, new	Aug 1, 2027	0.009 lb/d (3 values, 3 below detection)	—
OAKDALE, CITY OF	LA0033430	LA	Sewage plant, major	.79 MGD	Cadmium, total [as Cd]	weekly average 0.05 lb/d, new	Aug 1, 2027	0.009 lb/d (3 values, 3 below detection)	—
L&R UTILITIES INC-SOUTHERN PINES STP	LA0127349	LA	Industrial	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Sep 1, 2027	0.03 mg/L (9 values)	0.909×
SABINE PARISH POLICE JURY	LA0070904	LA	Sewage plant, major	—	Phenolics, total recoverable	daily maximum 0.013 mg/L, new	Sep 1, 2027	0.007 mg/L (3 values)	0.538×
SABINE PARISH POLICE JURY	LA0070904	LA	Sewage plant, major	—	Zinc, total [as Zn]	monthly average 0.097 mg/L, tighter	Sep 1, 2027	0.018 mg/L (3 values)	0.186×
SABINE PARISH POLICE JURY	LA0070904	LA	Sewage plant, major	—	Mercury, total [as Hg]	daily maximum 0.00006 mg/L, tighter	Sep 1, 2027	0 mg/L (3 values)	0×
ST. TAMMANY PARISH GOVERNMENT	LA0120235	LA	Sewage plant, major	1.25 MGD	Zinc, total [as Zn]	monthly average 0.67 lb/d, new	Oct 1, 2027	0.25 lb/d (3 values)	0.373×
ST. TAMMANY PARISH GOVERNMENT	LA0120235	LA	Sewage plant, major	1.25 MGD	Solids, total dissolved	monthly average 759 mg/L, new	Oct 1, 2027	282 mg/L (3 values)	0.372×
ST. TAMMANY PARISH GOVERNMENT	LA0120235	LA	Sewage plant, major	1.25 MGD	Zinc, total [as Zn]	daily maximum 1.59 lb/d, new	Oct 1, 2027	0.25 lb/d (3 values)	0.157×
ST. TAMMANY PARISH GOVERNMENT	LA0120235	LA	Sewage plant, major	1.25 MGD	Solids, total dissolved	weekly average 1805 mg/L, new	Oct 1, 2027	282 mg/L (3 values)	0.156×
ST. TAMMANY PARISH GOVERNMENT	LA0120235	LA	Sewage plant, major	1.25 MGD	Solids, total dissolved	monthly average 7907 lb/d, new	Oct 1, 2027	1072 lb/d (3 values)	0.136×
COTTON VALLEY, TOWN OF	LA0020401	LA	Sewage plant	.15 MGD	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2027	0 mg/L (9 values)	0×
VALENTINE CHEMICALS	LA0000906	LA	Industrial	—	Cyanide, total [as CN]	daily maximum 10.03 ug/L, new	Oct 1, 2027	0 ug/L (3 values)	0×
VALENTINE CHEMICALS	LA0000906	LA	Industrial	—	Cyanide, total [as CN]	monthly average 4.22 ug/L, new	Oct 1, 2027	0 ug/L (3 values)	0×
VALENTINE CHEMICALS	LA0000906	LA	Industrial	—	Heptachlor	daily maximum 0.00037 ug/L, new	Oct 1, 2027	0 ug/L (3 values)	0×
VALENTINE CHEMICALS	LA0000906	LA	Industrial	—	Heptachlor	monthly average 0.00016 ug/L, new	Oct 1, 2027	0 ug/L (3 values)	0×
LA DEPT OF PUBLIC SAFETY & CORRECTIONS	LA0051161	LA	Sewage plant	—	Chlorine, total residual	daily maximum 0.033 mg/L, new	Oct 1, 2027	under 3 values	—
TERREBONNE PARISH CONSOLIDATED GOVERNMENT	LA0100820	LA	Sewage plant	—	Copper, total [as Cu]	daily maximum 0.27 mg/L, new	Oct 1, 2027	under 3 values	—
TERREBONNE PARISH CONSOLIDATED GOVERNMENT	LA0100820	LA	Sewage plant	—	Copper, total [as Cu]	monthly average 0.11 mg/L, new	Oct 1, 2027	under 3 values	—
TERREBONNE PARISH CONSOLIDATED GOVERNMENT	LA0100820	LA	Sewage plant	—	Zinc, total [as Zn]	monthly average 0.81 mg/L, tighter	Oct 1, 2027	under 3 values	—
TERREBONNE PARISH CONSOLIDATED GOVERNMENT	LA0100820	LA	Sewage plant	—	Zinc, total [as Zn]	monthly average 0.81 mg/L, tighter	Oct 1, 2027	under 3 values	—
TERREBONNE PARISH CONSOLIDATED GOVERNMENT	LA0100820	LA	Sewage plant	—	Zinc, total [as Zn]	monthly average 0.81 mg/L, tighter	Oct 1, 2027	under 3 values	—
Town of Clinton- Wastewater Treatment Facility	LA0048445	LA	Sewage plant	.281 MGD	Chlorine, total residual	instantaneous maximum 0.046 mg/L, new	Oct 1, 2027	under 3 values	—
WASHINGTON PARISH GOVERNMENT	LA0068101	LA	Sewage plant	—	Chlorine, total residual	instantaneous maximum 0.033 mg/L, new	Oct 1, 2027	0.1 mg/L (8 values, 4 below detection)	—
WASHINGTON PARISH GOVERNMENT	LA0068101	LA	Sewage plant	—	Zinc, total [as Zn]	daily maximum 0.11 mg/L, tighter	Oct 1, 2027	under 3 values	—
WASHINGTON PARISH GOVERNMENT	LA0068101	LA	Sewage plant	—	Zinc, total [as Zn]	monthly average 0.045 mg/L, tighter	Oct 1, 2027	under 3 values	—
Entergy Arkansas, LLC- Ouachita Plant	LA0112780	LA	Industrial, major	—	Zinc, total [as Zn]	monthly average 0.48 mg/L, tighter	Nov 1, 2027	0.01 mg/L (12 values, 3 below detection)	0.0208×
DeSoto Parish Police Jury - Mundy Landfill	LA0066702	LA	Sewage plant	1.4024 MGD	Cyanide, total [as CN]	daily maximum 0.011 mg/L, tighter	Nov 1, 2027	under 3 values	—
DeSoto Parish Police Jury - Mundy Landfill	LA0066702	LA	Sewage plant	1.4024 MGD	Cyanide, total [as CN]	monthly average 0.0047 mg/L, tighter	Nov 1, 2027	under 3 values	—
DeSoto Parish Police Jury - Mundy Landfill	LA0066702	LA	Sewage plant	1.4024 MGD	Mercury, total [as Hg]	daily maximum 0.00008 mg/L, new	Nov 1, 2027	under 3 values	—
DeSoto Parish Police Jury - Mundy Landfill	LA0066702	LA	Sewage plant	1.4024 MGD	Mercury, total [as Hg]	monthly average 0.00003 mg/L, new	Nov 1, 2027	under 3 values	—
DeSoto Parish Police Jury - Mundy Landfill	LA0066702	LA	Sewage plant	1.4024 MGD	Mercury, total [as Hg]	daily maximum 0.00008 mg/L, new	Nov 1, 2027	under 3 values	—
DeSoto Parish Police Jury - Mundy Landfill	LA0066702	LA	Sewage plant	1.4024 MGD	Mercury, total [as Hg]	monthly average 0.00003 mg/L, new	Nov 1, 2027	under 3 values	—
Entergy Arkansas, LLC- Ouachita Plant	LA0112780	LA	Industrial, major	—	Copper, total [as Cu]	daily maximum 0.303 mg/L, new	Nov 1, 2027	under 3 values	—
Entergy Arkansas, LLC- Ouachita Plant	LA0112780	LA	Industrial, major	—	Copper, total [as Cu]	monthly average 0.128 mg/L, new	Nov 1, 2027	under 3 values	—
JEFFERSON DAVIS PARISH SANITARY LANDFILL	LA0076660	LA	Industrial	.9 MGD	Chromium, hexavalent [as Cr]	daily maximum 0.022 mg/L, new	Nov 1, 2027	under 3 values	—
JEFFERSON DAVIS PARISH SANITARY LANDFILL	LA0076660	LA	Industrial	.9 MGD	Chromium, hexavalent [as Cr]	monthly average 0.009 mg/L, new	Nov 1, 2027	under 3 values	—
JEFFERSON DAVIS PARISH SANITARY LANDFILL	LA0076660	LA	Industrial	.9 MGD	Chromium, hexavalent [as Cr]	daily maximum 0.023 mg/L, new	Nov 1, 2027	under 3 values	—
JEFFERSON DAVIS PARISH SANITARY LANDFILL	LA0076660	LA	Industrial	.9 MGD	Chromium, hexavalent [as Cr]	monthly average 0.009 mg/L, new	Nov 1, 2027	under 3 values	—
LAKE CHARLES HARBOR & TERMINAL DISTRICT	LA0091812	LA	Industrial	—	Copper, total [as Cu]	monthly average 0.022 mg/L, new	Jan 1, 2028	0.005 mg/L (3 values, 1 below detection)	0.227×
LAKE CHARLES HARBOR & TERMINAL DISTRICT	LA0091812	LA	Industrial	—	Copper, total [as Cu]	daily maximum 0.053 mg/L, new	Jan 1, 2028	0.005 mg/L (3 values, 1 below detection)	0.0943×
AURORIUM DENHAM SPRINGS LLC	LA0048704	LA	Industrial	—	Vinyl chloride	daily maximum 0.006 lb/d, tighter	Jan 1, 2028	under 3 values	—
AURORIUM DENHAM SPRINGS LLC	LA0048704	LA	Industrial	—	Vinyl chloride	monthly average 0.002 lb/d, tighter	Jan 1, 2028	under 3 values	—
CITY OF BATON ROUGE/PARISH OF EBR - PLEASANT PARK SUBDIVISION #357	LA0127763	LA	Industrial	—	Solids, total suspended	monthly average 15 mg/L, tighter	Feb 1, 2028	7.35 mg/L (9 values)	0.49×
CITY OF BATON ROUGE/PARISH OF EBR - PLEASANT PARK SUBDIVISION #357	LA0127763	LA	Industrial	—	Solids, total suspended	weekly average 23 mg/L, tighter	Feb 1, 2028	10.7 mg/L (9 values)	0.465×
VILLAGE OF DOYLINE	LA0075400	LA	Sewage plant	.11 MGD	Nitrogen, ammonia total [as N]	monthly average 1.8 mg/L, new	Apr 1, 2028	0.267 mg/L (11 values, 4 below detection)	0.148×
VILLAGE OF DOYLINE	LA0075400	LA	Sewage plant	.11 MGD	Nitrogen, ammonia total [as N]	weekly average 4.3 mg/L, new	Apr 1, 2028	0.281 mg/L (11 values, 4 below detection)	0.0653×
VILLAGE OF DOYLINE	LA0075400	LA	Sewage plant	.11 MGD	Nitrogen, ammonia total [as N]	monthly average 1.7 lb/d, new	Apr 1, 2028	0.08 lb/d (11 values, 4 below detection)	0.0471×
VILLAGE OF HARRISONBURG	LA0043958	LA	Sewage plant	.125 MGD	Nitrogen, ammonia total [as N]	monthly average 2 lb/d, tighter	Apr 1, 2028	0.01 lb/d (10 values)	0.005×
LAFAYETTE CONSOLIDATED GOVERNMENT- WESTPOINT ESTATES	LA0127640	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 2.1 mg/L, tighter	Apr 1, 2028	under 3 values	—
LAFAYETTE CONSOLIDATED GOVERNMENT- WESTPOINT ESTATES	LA0127640	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 0.9 mg/L, tighter	Apr 1, 2028	under 3 values	—
LAFAYETTE CONSOLIDATED GOVERNMENT- WESTPOINT ESTATES	LA0127640	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1 lb/d, tighter	Apr 1, 2028	under 3 values	—
ST MARY PARISH GOVERNMENT	LA0056227	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 5.2 mg/L, tighter	Apr 1, 2028	under 3 values	—
ST MARY PARISH GOVERNMENT	LA0056227	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2.2 mg/L, tighter	Apr 1, 2028	under 3 values	—
VILLAGE OF HARRISONBURG	LA0043958	LA	Sewage plant	.125 MGD	Nitrogen, ammonia total [as N]	monthly average 1.9 mg/L, tighter	Apr 1, 2028	1 mg/L (10 values, 8 below detection)	—
LA DEPT OF PUBLIC SAFETY & CORRECTIONS	LA0095273	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	weekly average 7 mg/L, tighter	Apr 15, 2028	6.89 mg/L (9 values)	0.984×
LA DEPT OF PUBLIC SAFETY & CORRECTIONS	LA0095273	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 6.9 lb/d, tighter	Apr 15, 2028	4.549 lb/d (9 values)	0.659×
PLAIN DEALING, TOWN-WWTP	LA0020044	LA	Sewage plant	.35 MGD	Nitrogen, ammonia total [as N]	monthly average 6.4 lb/d, new	Apr 15, 2028	2.41 lb/d (11 values)	0.377×
GOLDEN RANCH FARMS LLC - SITE 1	LA0127583	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 11.8 mg/L, tighter	Apr 15, 2028	under 3 values	—
GOLDEN RANCH FARMS LLC - SITE 1	LA0127583	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.97 mg/L, tighter	Apr 15, 2028	under 3 values	—
PLAIN DEALING, TOWN-WWTP	LA0020044	LA	Sewage plant	.35 MGD	Nitrogen, ammonia total [as N]	daily maximum 3.6 mg/L, new	Apr 15, 2028	under 3 values	—
POLLOCK WWTP	LA0098558	LA	Sewage plant	.9 MGD	Nitrogen, ammonia total [as N]	monthly average 6 lb/d, tighter	May 1, 2028	5.59 lb/d (9 values)	0.932×
VILLAGE OF NAPOLEONVILLE	LA0043966	LA	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	monthly average 0.9 lb/d, tighter	May 1, 2028	0.729 lb/d (9 values)	0.81×
BEAU CHENE HOMEOWNERS ASSOCIATION INC.	LA0044377	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 3.1 mg/L, tighter	May 1, 2028	1.2 mg/L (9 values, 1 below detection)	0.387×
BEAU CHENE HOMEOWNERS ASSOCIATION INC.	LA0044377	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L, tighter	May 1, 2028	0.5 mg/L (9 values, 5 below detection)	—
BEAU CHENE HOMEOWNERS ASSOCIATION INC.	LA0044377	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 6.5 lb/d, tighter	May 1, 2028	1.3 lb/d (9 values, 5 below detection)	—
CULLEN, TOWN OF	LA0032301	LA	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	monthly average 5.2 lb/d, tighter	May 1, 2028	under 3 values	—
CULLEN, TOWN OF	LA0032301	LA	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	monthly average 2.1 mg/L, tighter	May 1, 2028	under 3 values	—
CULLEN, TOWN OF	LA0032301	LA	Sewage plant	.3 MGD	Nitrogen, ammonia total [as N]	weekly average 5 mg/L, tighter	May 1, 2028	under 3 values	—
Morse Village of - STP	LA0064572	LA	Sewage plant	.22 MGD	Mercury, total [as Hg]	monthly average 0.00004 mg/L, new	May 1, 2028	under 3 values	—
Morse Village of - STP	LA0064572	LA	Sewage plant	.22 MGD	Mercury, total [as Hg]	monthly average 0.00004 lb/d, new	May 1, 2028	under 3 values	—
Morse Village of - STP	LA0064572	LA	Sewage plant	.22 MGD	Mercury, total [as Hg]	weekly average 0.00009 mg/L, new	May 1, 2028	under 3 values	—
POLLOCK WWTP	LA0098558	LA	Sewage plant	.9 MGD	Nitrogen, ammonia total [as N]	monthly average 0.8 mg/L, tighter	May 1, 2028	1 mg/L (9 values, 9 below detection)	—
POLLOCK WWTP	LA0098558	LA	Sewage plant	.9 MGD	Nitrogen, ammonia total [as N]	weekly average 2 mg/L, tighter	May 1, 2028	1 mg/L (9 values, 9 below detection)	—
ST. JOHN THE BAPTIST PARISH	LA0065951	LA	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	monthly average 8.3 lb/d, new	May 1, 2028	under 3 values	—
ST. JOHN THE BAPTIST PARISH	LA0065951	LA	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	monthly average 4 mg/L, new	May 1, 2028	under 3 values	—
ST. JOHN THE BAPTIST PARISH	LA0065951	LA	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	weekly average 9.5 mg/L, new	May 1, 2028	under 3 values	—
HEBERT'S MEAT MARKET & SLAUGHTER HOUSE, LLC	LA0125644	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 0.03 lb/d, tighter	May 15, 2028	0.01 lb/d (9 values)	0.333×
HEBERT'S MEAT MARKET & SLAUGHTER HOUSE, LLC	LA0125644	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 0.07 lb/d, tighter	May 15, 2028	0.01 lb/d (9 values)	0.143×
RAYVILLE, TOWN OF	LA0020559	LA	Sewage plant, major	1.496 MGD	Nitrogen, ammonia total [as N]	monthly average 2 mg/L, tighter	Jun 1, 2028	1.59 mg/L (11 values)	0.795×
RAYVILLE, TOWN OF	LA0020559	LA	Sewage plant, major	1.496 MGD	Nitrogen, ammonia total [as N]	weekly average 4.7 mg/L, tighter	Jun 1, 2028	2.94 mg/L (11 values)	0.626×
BOSSIER CITY	LA0053716	LA	Sewage plant, major	12 MGD	Nitrogen, ammonia total [as N]	weekly average 5 mg/L, new	Jun 1, 2028	2.51 mg/L (11 values)	0.502×
BOSSIER CITY	LA0053716	LA	Sewage plant, major	12 MGD	Nitrogen, ammonia total [as N]	monthly average 2.1 mg/L, new	Jun 1, 2028	0.62 mg/L (11 values)	0.295×
Town of Jena	LA0033260	LA	Sewage plant, major	1.4 MGD	Nitrogen, ammonia total [as N]	monthly average 19.9 lb/d, tighter	Jun 1, 2028	5.5 lb/d (11 values)	0.276×
BOSSIER CITY	LA0053716	LA	Sewage plant, major	12 MGD	Nitrogen, ammonia total [as N]	monthly average 212 lb/d, new	Jun 1, 2028	22 lb/d (11 values)	0.104×
GREATER OUACHITA WATER CO.,INC	LA0110485	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2 mg/L, tighter	Jun 1, 2028	0.031 mg/L (9 values, 1 below detection)	0.0155×
GREATER OUACHITA WATER CO.,INC	LA0110485	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 4.7 mg/L, tighter	Jun 1, 2028	0.04 mg/L (9 values, 1 below detection)	0.00851×
GREATER OUACHITA WATER CO.,INC	LA0110485	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 9.5 lb/d, tighter	Jun 1, 2028	0.075 lb/d (9 values)	0.00789×
Entergy Operations Inc - Waterford 3 Steam Electric Station	LA0007374	LA	Industrial, major	1433.12 MGD	Zinc, total [as Zn]	daily maximum 0.511 mg/L, tighter	Jun 1, 2028	under 3 values	—
Entergy Operations Inc - Waterford 3 Steam Electric Station	LA0007374	LA	Industrial, major	1433.12 MGD	Zinc, total [as Zn]	monthly average 0.215 mg/L, tighter	Jun 1, 2028	under 3 values	—
GLENMORA, TOWN OF	LA0054925	LA	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	monthly average 5.9 mg/L, tighter	Jun 1, 2028	1 mg/L (9 values, 8 below detection)	—
GLENMORA, TOWN OF	LA0054925	LA	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	monthly average 17 lb/d, tighter	Jun 1, 2028	1 lb/d (9 values, 6 below detection)	—
GLENMORA, TOWN OF	LA0054925	LA	Sewage plant	.21 MGD	Nitrogen, ammonia total [as N]	weekly average 14 mg/L, tighter	Jun 1, 2028	1 mg/L (9 values, 7 below detection)	—
Town of Jena	LA0033260	LA	Sewage plant, major	1.4 MGD	Nitrogen, ammonia total [as N]	monthly average 1.7 mg/L, tighter	Jun 1, 2028	1 mg/L (11 values, 8 below detection)	—
Town of Jena	LA0033260	LA	Sewage plant, major	1.4 MGD	Nitrogen, ammonia total [as N]	weekly average 4 mg/L, tighter	Jun 1, 2028	1 mg/L (11 values, 8 below detection)	—
WEST BATON ROUGE NATURAL GAS & WATER SYSTEMS	LA0122131	LA	Sewage plant	.125 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 lb/d, new	Jun 15, 2028	under 3 values	—
WEST BATON ROUGE NATURAL GAS & WATER SYSTEMS	LA0122131	LA	Sewage plant	.125 MGD	Nitrogen, ammonia total [as N]	monthly average 1.2 mg/L, new	Jun 15, 2028	under 3 values	—
WEST BATON ROUGE NATURAL GAS & WATER SYSTEMS	LA0122131	LA	Sewage plant	.125 MGD	Nitrogen, ammonia total [as N]	weekly average 2.9 mg/L, new	Jun 15, 2028	under 3 values	—
TOWN OF LIVONIA	LA0124851	LA	Sewage plant	0 MGD	Nitrogen, ammonia total [as N]	monthly average 2 lb/d, new	Jul 1, 2028	1.87 lb/d (11 values)	0.935×
Utilities, Inc. of LA- Arrowwood Regional WWTP	LA0066559	LA	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 3.1 mg/L, tighter	Jul 1, 2028	0.44 mg/L (11 values, 2 below detection)	0.142×
Utilities, Inc. of LA- Arrowwood Regional WWTP	LA0066559	LA	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 51 lb/d, tighter	Jul 1, 2028	5.68 lb/d (11 values)	0.111×
City of Ruston- Northside Wastewater Treatment Plant	LA0036323	LA	Sewage plant, major	4 MGD	Nitrogen, ammonia total [as N]	monthly average 1.7 mg/L, tighter	Jul 1, 2028	0.111 mg/L (12 values)	0.0653×
City of Ruston- Northside Wastewater Treatment Plant	LA0036323	LA	Sewage plant, major	4 MGD	Nitrogen, ammonia total [as N]	weekly average 4 mg/L, tighter	Jul 1, 2028	0.25 mg/L (12 values)	0.0625×
Utilities, Inc. of LA- Arrowwood Regional WWTP	LA0066559	LA	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 7.3 mg/L, tighter	Jul 1, 2028	0.44 mg/L (11 values, 2 below detection)	0.0603×
City of Ruston- Northside Wastewater Treatment Plant	LA0036323	LA	Sewage plant, major	4 MGD	Nitrogen, ammonia total [as N]	monthly average 85 lb/d, tighter	Jul 1, 2028	2.715 lb/d (12 values)	0.0319×
GREATER OUACHITA WATER COMPANY	LA0101834	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.8 mg/L, tighter	Jul 1, 2028	0.031 mg/L (9 values, 1 below detection)	0.0172×
GREATER OUACHITA WATER COMPANY	LA0101834	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 7.2 lb/d, tighter	Jul 1, 2028	0.11 lb/d (9 values)	0.0153×
GREATER OUACHITA WATER COMPANY	LA0101834	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 4.4 mg/L, tighter	Jul 1, 2028	0.031 mg/L (9 values, 1 below detection)	0.00705×
RAPIDES PARISH SEWERAGE DISTRICT #1	LA0039021	LA	Sewage plant	.14 MGD	Nitrogen, ammonia total [as N]	monthly average 2.2 lb/d, tighter	Jul 1, 2028	1 lb/d (9 values, 8 below detection)	—
RAPIDES PARISH SEWERAGE DISTRICT #1	LA0039021	LA	Sewage plant	.14 MGD	Nitrogen, ammonia total [as N]	monthly average 1.9 mg/L, tighter	Jul 1, 2028	1 mg/L (9 values, 9 below detection)	—
RAPIDES PARISH SEWERAGE DISTRICT #1	LA0039021	LA	Sewage plant	.14 MGD	Nitrogen, ammonia total [as N]	weekly average 4.4 mg/L, tighter	Jul 1, 2028	1 mg/L (9 values, 7 below detection)	—
TOWN OF LIVONIA	LA0124851	LA	Sewage plant	0 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L, new	Jul 1, 2028	1 mg/L (11 values, 10 below detection)	—
TOWN OF LIVONIA	LA0124851	LA	Sewage plant	0 MGD	Nitrogen, ammonia total [as N]	weekly average 3.7 mg/L, new	Jul 1, 2028	1 mg/L (11 values, 10 below detection)	—
ACADIA PARISH POLICE JURY	LA0065676	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 0.77 mg/L, tighter	Jul 15, 2028	0.42 mg/L (3 values)	0.545×
ACADIA PARISH POLICE JURY	LA0065676	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 1.8 mg/L, tighter	Jul 15, 2028	0.42 mg/L (3 values)	0.233×
LAKE ARTHUR, TOWN OF	LA0020133	LA	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	weekly average 3 mg/L, tighter	Jul 15, 2028	0.29 mg/L (9 values)	0.0967×
Office of Juvenile Justice	LA0049620	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.8 lb/d, new	Jul 15, 2028	0.00001315 lb/d (5 values)	0.00000731×
Office of Juvenile Justice	LA0049620	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.8 mg/L, new	Jul 15, 2028	0 mg/L (5 values)	0×
Office of Juvenile Justice	LA0049620	LA	Industrial	—	Nitrogen, ammonia total [as N]	weekly average 4.4 mg/L, new	Jul 15, 2028	0 mg/L (5 values)	0×
American Water Operations and Maintenance, LLC. - North Fort Polk WWTP	LA0032239	LA	Industrial, major	—	Nitrogen, ammonia total [as N]	daily maximum 6.5 mg/L, tighter	Jul 15, 2028	1 mg/L (12 values, 12 below detection)	—
American Water Operations and Maintenance, LLC. - North Fort Polk WWTP	LA0032239	LA	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 2.7 mg/L, tighter	Jul 15, 2028	1 mg/L (12 values, 12 below detection)	—
American Water Operations and Maintenance, LLC. - North Fort Polk WWTP	LA0032239	LA	Industrial, major	—	Nitrogen, ammonia total [as N]	monthly average 39 lb/d, tighter	Jul 15, 2028	3.16 lb/d (12 values, 12 below detection)	—
LAKE ARTHUR, TOWN OF	LA0020133	LA	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	monthly average 8 lb/d, tighter	Jul 15, 2028	0.709 lb/d (9 values, 6 below detection)	—
LAKE ARTHUR, TOWN OF	LA0020133	LA	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L, tighter	Jul 15, 2028	0.153 mg/L (9 values, 6 below detection)	—
TOWN OF MORGANZA	LA0020028	LA	Sewage plant	.235 MGD	Nitrogen, ammonia total [as N]	weekly average 3.7 mg/L, new	Aug 1, 2028	3.41 mg/L (11 values)	0.922×
TOWN OF MORGANZA	LA0020028	LA	Sewage plant	.235 MGD	Nitrogen, ammonia total [as N]	monthly average 2 lb/d, new	Aug 1, 2028	1.8 lb/d (11 values)	0.9×
Thibodaux City of - North Thibodaux WWTP	LA0127208	LA	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	weekly average 7.7 mg/L, new	Aug 1, 2028	4.2 mg/L (12 values)	0.545×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0081418	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.7 mg/L, new	Aug 1, 2028	0.28 mg/L (9 values, 3 below detection)	0.165×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0081418	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 4 mg/L, new	Aug 1, 2028	0.47 mg/L (9 values)	0.117×
ST TAMMANY PAR-SD #4	LA0043583	LA	Sewage plant	.1 MGD	Nitrogen, ammonia total [as N]	weekly average 6.2 mg/L, tighter	Aug 1, 2028	0.3 mg/L (9 values, 2 below detection)	0.0484×
UTILITIES INC., OF LOUISIANA	LA0051179	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2.8 lb/d, tighter	Aug 1, 2028	0.08 lb/d (3 values)	0.0286×
MAGNOLIA WATER UTILITY OPERATING CO., LLC	LA0081418	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.2 lb/d, new	Aug 1, 2028	0.097 lb/d (9 values, 3 below detection)	0.0231×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	1,2-Dichloroethane	daily maximum 206.71 ug/L, tighter	Aug 1, 2028	0 ug/L (4 values)	0×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	2,3,7,8-Tetrachlorodibenzo-p-dioxin	daily maximum 0.000022 ug/L, new	Aug 1, 2028	0 ug/L (4 values)	0×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	2,3,7,8-Tetrachlorodibenzo-p-dioxin	monthly average 0.0000092 ug/L, new	Aug 1, 2028	0 ug/L (4 values)	0×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	Carbon tetrachloride	daily maximum 36.48 ug/L, tighter	Aug 1, 2028	0 ug/L (4 values)	0×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	Carbon tetrachloride	monthly average 15.38 ug/L, tighter	Aug 1, 2028	0 ug/L (4 values)	0×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	Mercury, total [as Hg]	daily maximum 0.135 ug/L, new	Aug 1, 2028	0 ug/L (4 values)	0×
Arclin U.S.A., LLC.- Dodson Facility	LA0007501	LA	Industrial, major	—	Mercury, total [as Hg]	monthly average 0.057 ug/L, new	Aug 1, 2028	0 ug/L (4 values)	0×
BOISE CASCADE WOOD PRODUCTS LLC	LA0004901	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 5.5 mg/L, tighter	Aug 1, 2028	0.5 mg/L (9 values, 8 below detection)	—
BOISE CASCADE WOOD PRODUCTS LLC	LA0004901	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2.3 mg/L, tighter	Aug 1, 2028	0.5 mg/L (9 values, 8 below detection)	—
ST TAMMANY PAR-SD #4	LA0043583	LA	Sewage plant	.1 MGD	Nitrogen, ammonia total [as N]	monthly average 2.6 mg/L, tighter	Aug 1, 2028	0.2 mg/L (9 values, 5 below detection)	—
ST TAMMANY PAR-SD #4	LA0043583	LA	Sewage plant	.1 MGD	Nitrogen, ammonia total [as N]	monthly average 3.5 lb/d, tighter	Aug 1, 2028	0.2 lb/d (9 values, 5 below detection)	—
UTILITIES INC., OF LOUISIANA	LA0051179	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 3.8 mg/L, tighter	Aug 1, 2028	0.12 mg/L (3 values, 2 below detection)	—
UTILITIES INC., OF LOUISIANA	LA0051179	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L, tighter	Aug 1, 2028	0.12 mg/L (3 values, 2 below detection)	—
MAGNOLIA WATER UTILITY OPERATING CO., LLC - SILVER HILLS & THE ESTATES SUBD	LA0127133	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 6.5 mg/L, new	Aug 15, 2028	4.6 mg/L (9 values)	0.708×
MAGNOLIA WATER UTILITY OPERATING CO., LLC - SILVER HILLS & THE ESTATES SUBD	LA0127133	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2.7 mg/L, new	Aug 15, 2028	1.8 mg/L (9 values, 2 below detection)	0.667×
TOWN OF HAYNESVILLE	LA0034614	LA	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L, tighter	Aug 15, 2028	0.645 mg/L (9 values, 1 below detection)	0.496×
TOWN OF HAYNESVILLE	LA0034614	LA	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 5.4 lb/d, tighter	Aug 15, 2028	1.3 lb/d (9 values, 1 below detection)	0.241×
TOWN OF HAYNESVILLE	LA0034614	LA	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	weekly average 3.1 mg/L, tighter	Aug 15, 2028	0.636 mg/L (9 values, 1 below detection)	0.205×
MAGNOLIA WATER UTILITY OPERATING CO., LLC - SILVER HILLS & THE ESTATES SUBD	LA0127133	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 5.9 lb/d, new	Aug 15, 2028	0.734 lb/d (9 values, 2 below detection)	0.124×
City of Bogalusa- WWTP	LA0046515	LA	Sewage plant, major	15 MGD	Nitrogen, ammonia total [as N]	weekly average 10.7 mg/L, tighter	Aug 15, 2028	0.7 mg/L (11 values)	0.0654×
City of Bogalusa- WWTP	LA0046515	LA	Sewage plant, major	15 MGD	Nitrogen, ammonia total [as N]	monthly average 225 lb/d, tighter	Aug 15, 2028	11.1 lb/d (11 values, 10 below detection)	—
City of Bogalusa- WWTP	LA0046515	LA	Sewage plant, major	15 MGD	Nitrogen, ammonia total [as N]	monthly average 4.5 mg/L, tighter	Aug 15, 2028	0.4 mg/L (11 values, 10 below detection)	—
WASTE MANAGEMENT OF LOUISIANA LLC	LA0075817	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 5.9 mg/L, tighter	Aug 15, 2028	under 3 values	—
WASTE MANAGEMENT OF LOUISIANA LLC	LA0075817	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2.5 mg/L, tighter	Aug 15, 2028	under 3 values	—
TOWN OF SIBLEY	LA0075396	LA	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	daily maximum 6.1 mg/L, new	Sep 1, 2028	3.56 mg/L (9 values)	0.584×
TOWN OF SIBLEY	LA0075396	LA	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	monthly average 4.3 lb/d, new	Sep 1, 2028	1.66 lb/d (9 values)	0.386×
City of Leesville	LA0043575	LA	Sewage plant, major	2.1 MGD	Nitrogen, ammonia total [as N]	monthly average 36.6 lb/d, tighter	Sep 1, 2028	9.11 lb/d (11 values)	0.249×
CITY OF ABBEVILLE	LA0039748	LA	Sewage plant, major	1.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1.2 mg/L, tighter	Sep 1, 2028	0.127 mg/L (10 values)	0.106×
CITY OF ABBEVILLE	LA0039748	LA	Sewage plant, major	1.6 MGD	Nitrogen, ammonia total [as N]	monthly average 26 lb/d, tighter	Sep 1, 2028	2.5 lb/d (10 values)	0.0962×
City of Leesville	LA0043575	LA	Sewage plant, major	2.1 MGD	Nitrogen, ammonia total [as N]	daily maximum 5 mg/L, tighter	Sep 1, 2028	1 mg/L (11 values, 7 below detection)	—
City of Leesville	LA0043575	LA	Sewage plant, major	2.1 MGD	Nitrogen, ammonia total [as N]	monthly average 2.1 mg/L, tighter	Sep 1, 2028	1 mg/L (11 values, 7 below detection)	—
CLAIBORNE PARISH DETENTION	LA0111163	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 0.4 lb/d, new	Sep 1, 2028	0.032 lb/d (10 values, 9 below detection)	—
CLAIBORNE PARISH DETENTION	LA0111163	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 0.5 mg/L, new	Sep 1, 2028	0.1 mg/L (10 values, 9 below detection)	—
CLAIBORNE PARISH DETENTION	LA0111163	LA	Sewage plant	—	Nitrogen, ammonia total [as N]	weekly average 1.1 mg/L, new	Sep 1, 2028	0.1 mg/L (10 values, 9 below detection)	—
MAGNOLIA WATER UTILITY OPERATING CO., LLC - OAKWOOD REGIONAL WWT FACILITY	LA0052078	LA	Industrial	—	Nitrogen, ammonia [NH3-N]	daily maximum 4.4 mg/L, new	Sep 1, 2028	under 3 values	—
MAGNOLIA WATER UTILITY OPERATING CO., LLC - OAKWOOD REGIONAL WWT FACILITY	LA0052078	LA	Industrial	—	Nitrogen, ammonia [NH3-N]	monthly average 14 lb/d, new	Sep 1, 2028	under 3 values	—
MAGNOLIA WATER UTILITY OPERATING CO., LLC - OAKWOOD REGIONAL WWT FACILITY	LA0052078	LA	Industrial	—	Nitrogen, ammonia [NH3-N]	monthly average 1.9 mg/L, new	Sep 1, 2028	under 3 values	—
WEBSTER PARISH LANDFILL, LLC	LA0074276	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 8.8 mg/L, tighter	Sep 1, 2028	under 3 values	—
WEBSTER PARISH LANDFILL, LLC	LA0074276	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 3.7 mg/L, tighter	Sep 1, 2028	under 3 values	—
MER ROUGE, VILLAGE OF	LA0043974	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.8 mg/L, tighter	Sep 14, 2028	1.53 mg/L (10 values, 2 below detection)	0.85×
MER ROUGE, VILLAGE OF	LA0043974	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	weekly average 4.3 mg/L, tighter	Sep 14, 2028	2.37 mg/L (10 values, 2 below detection)	0.551×
MER ROUGE, VILLAGE OF	LA0043974	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 7.6 lb/d, tighter	Sep 14, 2028	0.085 lb/d (10 values)	0.0112×
ST. TAMMANY PARISH GOVERNMENT, TAMMANY UTILITIES	LA0117676	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L, tighter	Sep 15, 2028	0.31 mg/L (9 values, 2 below detection)	0.221×
UTILITIES INC., OF LOUISIANA	LA0065757	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.5 mg/L, tighter	Sep 15, 2028	0.25 mg/L (11 values, 2 below detection)	0.167×
UTILITIES INC., OF LOUISIANA	LA0065757	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 3.6 mg/L, tighter	Sep 15, 2028	0.37 mg/L (11 values, 2 below detection)	0.103×
ST. TAMMANY PARISH GOVERNMENT, TAMMANY UTILITIES	LA0117676	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	weekly average 3.4 mg/L, tighter	Sep 15, 2028	0.31 mg/L (9 values, 2 below detection)	0.0912×
ST. TAMMANY PARISH GOVERNMENT, TAMMANY UTILITIES	LA0117676	LA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 6 lb/d, tighter	Sep 15, 2028	0.5 lb/d (9 values, 2 below detection)	0.0833×
UTILITIES INC., OF LOUISIANA	LA0065757	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.6 lb/d, tighter	Sep 15, 2028	0.2 lb/d (11 values)	0.0435×
EPPS, VILLAGE OF	LA0020141	LA	Sewage plant	.075 MGD	Nitrogen, ammonia total [as N]	monthly average 2.3 lb/d, tighter	Sep 15, 2028	0.014 lb/d (6 values)	0.00609×
EPPS, VILLAGE OF	LA0020141	LA	Sewage plant	.075 MGD	Nitrogen, ammonia total [as N]	monthly average 1.2 mg/L, tighter	Sep 15, 2028	0.077 mg/L (6 values, 3 below detection)	—
EPPS, VILLAGE OF	LA0020141	LA	Sewage plant	.075 MGD	Nitrogen, ammonia total [as N]	weekly average 1.9 mg/L, tighter	Sep 15, 2028	0.1055 mg/L (6 values, 3 below detection)	—
Iota Town of - WWTP	LA0040142	LA	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L, tighter	Oct 1, 2028	0.64 mg/L (9 values)	0.64×
HESSMER, VILLAGE OF	LA0046469	LA	Sewage plant	.086 MGD	Nitrogen, ammonia total [as N]	weekly average 5 mg/L (Jan, Feb, Mar, Nov, Dec), tighter	Oct 1, 2028	2.94 mg/L (5 values, 2 below detection)	0.588×
HESSMER, VILLAGE OF	LA0046469	LA	Sewage plant	.086 MGD	Nitrogen, ammonia total [as N]	monthly average 2.7 lb/d (Jan, Feb, Mar, Nov, Dec), tighter	Oct 1, 2028	1.52 lb/d (5 values)	0.563×
Slidell City of - Terrace Avenue WWTP	LA0047180	LA	Sewage plant, major	6 MGD	Nitrogen, ammonia total [as N]	monthly average 0.7 mg/L, tighter	Oct 1, 2028	0.29 mg/L (11 values)	0.414×
Iota Town of - WWTP	LA0040142	LA	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	weekly average 2.7 mg/L, tighter	Oct 1, 2028	0.8 mg/L (9 values)	0.296×
Slidell City of - Terrace Avenue WWTP	LA0047180	LA	Sewage plant, major	6 MGD	Nitrogen, ammonia total [as N]	monthly average 35.8 lb/d, tighter	Oct 1, 2028	9.73 lb/d (11 values)	0.272×
WEST FELICIANA WASTEWATER LLC	LA0122301	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L, new	Oct 1, 2028	0.33 mg/L (9 values)	0.236×
Slidell City of - Terrace Avenue WWTP	LA0047180	LA	Sewage plant, major	6 MGD	Nitrogen, ammonia total [as N]	weekly average 3.2 mg/L, tighter	Oct 1, 2028	0.47 mg/L (11 values)	0.147×
WEST FELICIANA WASTEWATER LLC	LA0122301	LA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 3.4 mg/L, new	Oct 1, 2028	0.44 mg/L (9 values)	0.129×
Iota Town of - WWTP	LA0040142	LA	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 6.9 lb/d, tighter	Oct 1, 2028	0.81 lb/d (9 values)	0.117×
WEST FELICIANA WASTEWATER LLC	LA0122301	LA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1.5 lb/d, new	Oct 1, 2028	0.15 lb/d (9 values)	0.1×
MARION, TOWN OF	LA0043656	LA	Sewage plant	.26 MGD	Nitrogen, ammonia total [as N]	monthly average 4.2 lb/d, tighter	Oct 1, 2028	0.28 lb/d (11 values)	0.0667×
City of Winnsboro - Winnsboro Municipal Treatment Plant	LA0020281	LA	Sewage plant	1.2 MGD	Nitrogen, ammonia total [as N]	monthly average 13.4 lb/d, tighter	Oct 1, 2028	0.64 lb/d (9 values)	0.0478×
St Tammany Parish Government Department of Utilities- Goodbee Regional WWTP	LA0123269	LA	Sewage plant	.7 MGD	Chlorine, total residual	instantaneous maximum 0.003 mg/L, new	Oct 1, 2028	0 mg/L (8 values)	0×
City of Winnsboro - Winnsboro Municipal Treatment Plant	LA0020281	LA	Sewage plant	1.2 MGD	Nitrogen, ammonia total [as N]	monthly average 2 mg/L, tighter	Oct 1, 2028	1 mg/L (9 values, 6 below detection)	—

The 300 soonest limits are listed, plants already above them first; all 404 are in the JSON at /dmr/data/upcoming.json.

Each limit is one EPA's ICIS-NPDES file holds on the permit's current version with a begin date after today, enforceable and numeric, either on a parameter the outfall was never limited on (new) or lower than the limit in force (tighter). Today's median is the plant's own reported values for the same outfall, statistic and unit between Oct 1, 2025 and Sep 30, 2026, with how many; none is shown where most were below a detection limit. Read the permit before relying on a value.

Sell to these plants? The list for your states every week, with every plant over a limit on your pollutant, as a spreadsheet, by API and by email when a new one appears: ask for the plant list, or write to info@passage-data.com. What a seller gets.

For programs and AI agents: a state's permits with these limits as JSON at /api/v1/permits?state=LA&upcoming=true, narrowed with &facility_type=potw or &min_flow_mgd=1; the whole list at /dmr/data/upcoming.json; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states

Plants facing new discharge limits — by state and pollutant