for Nitrogen, ammonia total [as N]: 526 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Oct 23, 2026 and Oct 1, 2032 (5827 limits); 75 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: IA 90 · LA 80 · MS 63 · MD 45 · PA 45 · OH 40 · MI 33 · VA 33 · GA 22 · SC 8 · NE 7 · NY 7 · TX 7 · IN 6 · KS 6 · MO 5 · UT 5 · OR 4 · SD 4 · TN 4 · IL 3 · AR 2 · MN 2 · NJ 2 · NM 2 · CO 1

Plant	Permit	State	Type	Design flow	Parameter	New limit	Effective	Today's median	× limit
WESTPORT WWTP	IN0024830	IN	Sewage plant	.43 MGD	Nitrogen, ammonia total [as N]	monthly average 3.2 mg/L (Jan, Feb, Mar, Apr, Dec), tighter	Dec 1, 2026	9.023 mg/L (3 values)	2.82×
WESTPORT WWTP	IN0024830	IN	Sewage plant	.43 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 4.8 mg/L (Jan, Feb, Mar, Apr, Dec), tighter	Dec 1, 2026	11.4 mg/L (3 values)	2.38×
WESTPORT WWTP	IN0024830	IN	Sewage plant	.43 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L (May–Nov), tighter	Dec 1, 2026	3.645 mg/L (4 values)	2.28×
WESTPORT WWTP	IN0024830	IN	Sewage plant	.43 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.4 mg/L (May–Nov), tighter	Dec 1, 2026	4.065 mg/L (4 values)	1.69×
OKHISSA LAKE SEWER DISTRICT WASTEWATER FACILITY	MS0060291	MS	Sewage plant	.4 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Dec 18, 2026	10.1 mg/L (3 values)	7.37×
OKHISSA LAKE SEWER DISTRICT WASTEWATER FACILITY	MS0060291	MS	Sewage plant	.4 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 4.6 lb/d, tighter	Dec 18, 2026	10.1 lb/d (3 values)	2.2×
OKHISSA LAKE SEWER DISTRICT WASTEWATER FACILITY	MS0060291	MS	Sewage plant	.4 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 6.9 lb/d, tighter	Dec 18, 2026	10.1 lb/d (3 values)	1.46×
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L (May–Oct), new	Jan 1, 2027	6.64 mg/L (5 values)	6.64×
JACKSON GENERATION LLC	IL0080134	IL	Industrial	.46 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.6 mg/L (Jan, Feb, Nov, Dec), new	Jan 1, 2027	11.9 mg/L (4 values)	2.12×
City of Monticello	GA0020141	GA	Sewage plant	.404 MGD	Nitrogen, ammonia total [as N]	monthly average 9.5 mg/L, new	Jan 1, 2027	18.4 mg/L (11 values)	1.94×
PALISADES SCH DIST	PA0029530	PA	Industrial	.022 MGD	Nitrogen, ammonia total [as N]	monthly average 1.5 mg/L (May–Oct), tighter	Jan 1, 2027	2.8 mg/L (3 values)	1.87×
Erie Co Dept of Environmental Services	OH0053082	OH	Sewage plant, major	2.4 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Jan 1, 2027	4.95 mg/L (6 values)	1.65×
PAYSON CITY CORP	UT0020427	UT	Sewage plant, major	3 MGD	Nitrogen, ammonia total [as N]	daily maximum 4 mg/L (Apr–Jun), tighter	Jan 1, 2027	4.26 mg/L (3 values)	1.06×
City of Steele	MO0057444	MO	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 3.9 mg/L (Jan, Feb, Mar, Nov), new	Feb 1, 2027	9.585 mg/L (4 values)	2.46×
CANONSBURG HOUSTON JT AUTH	PA0025941	PA	Sewage plant, major	14.4 MGD	Nitrogen, ammonia total [as N]	monthly average 2.16 mg/L (May–Oct), tighter	Feb 1, 2027	3.6 mg/L (3 values)	1.67×
CANONSBURG HOUSTON JT AUTH	PA0025941	PA	Sewage plant, major	14.4 MGD	Nitrogen, ammonia total [as N]	weekly average 3.24 mg/L (May–Oct), tighter	Feb 1, 2027	4.5 mg/L (3 values)	1.39×
CANONSBURG HOUSTON JT AUTH	PA0025941	PA	Sewage plant, major	14.4 MGD	Nitrogen, ammonia total [as N]	monthly average 4.47 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Feb 1, 2027	5.5 mg/L (6 values)	1.23×
CANONSBURG HOUSTON JT AUTH	PA0025941	PA	Sewage plant, major	14.4 MGD	Nitrogen, ammonia total [as N]	weekly average 6.7 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Feb 1, 2027	7.9 mg/L (6 values)	1.18×
JOHNSTOWN REDEV AUTH CAMBRIA CNTY	PA0026034	PA	Sewage plant, major	12 MGD	Nitrogen, ammonia total [as N]	monthly average 16.32 mg/L (May–Oct), tighter	Feb 1, 2027	18.1 mg/L (3 values)	1.11×
TUNICA COUNTY UTILITY DISTRICT, DUNDEE FACILITY	MS0058165	MS	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Feb 20, 2027	6.55 mg/L (3 values)	4.78×
TUNICA COUNTY UTILITY DISTRICT, DUNDEE FACILITY	MS0058165	MS	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Feb 20, 2027	6.55 mg/L (3 values)	3.2×
Kenbridge Town	VA0026239	VA	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1.21 mg/L (Jan–Apr), tighter	Mar 1, 2027	3.3 mg/L (3 values)	2.73×
COLWICH, CITY OF	KS0090956	KS	Sewage plant	—	Nitrogen, ammonia total [as N]	monthly average 1.7 mg/L (Jul–Sep), new	Mar 31, 2027	1.93 mg/L (3 values)	1.14×
EAGLE LAKE COMM ASSN INC	PA0061603	PA	Industrial	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L (May–Oct), tighter	Apr 1, 2027	8.8 mg/L (3 values)	6.29×
City of Monticello	GA0020150	GA	Sewage plant	.12 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L, new	Apr 1, 2027	17.9 mg/L (11 values)	5.97×
Elida, Village of	OH0024996	OH	Sewage plant	.8 MGD	Nitrogen, ammonia total [as N]	monthly average 3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Apr 1, 2027	15.26 mg/L (6 values)	5.09×
EAGLE LAKE COMM ASSN INC	PA0061603	PA	Industrial	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 5.8 lb/d (May–Oct), tighter	Apr 1, 2027	11 lb/d (3 values)	1.9×
Village of Columbus Grove WWTP	OH0024759	OH	Sewage plant	.82 MGD	Nitrogen, ammonia total [as N]	monthly average 0.86 mg/L, tighter	Apr 1, 2027	1.06 mg/L (11 values)	1.23×
WAVERLY TWP LACKAWANNA CNTY	PA0061034	PA	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	monthly average 4.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Apr 1, 2027	5.5 mg/L (5 values, 2 below detection)	1.22×
Village of Columbus Grove WWTP	OH0024759	OH	Sewage plant	.82 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.29 mg/L, tighter	Apr 1, 2027	1.54 mg/L (11 values)	1.19×
Chatham Water Utility, LLC	GA0030104	GA	Industrial	.1 MGD	Nitrogen, ammonia total [as N]	monthly average 0.4 mg/L, new	May 1, 2027	8.25 mg/L (10 values)	20.6×
TOWN OF DELMAR	MD0020532	MD	Sewage plant	.85 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Aug 1, 2027	1.55 mg/L (6 values)	1.03×
Lakeshore Management, INC	MD0024546	MD	Sewage plant	.1125 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1 mg/L (May–Oct), tighter	Sep 1, 2027	3 mg/L (3 values)	3×
Lakeshore Management, INC	MD0024546	MD	Sewage plant	.1125 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Sep 1, 2027	2.2 mg/L (4 values)	1.57×
Maryland Environmental Service (MES)	MD0063207	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum daily average 2.3 mg/L (Apr–Oct), tighter	Sep 1, 2027	2.75 mg/L (6 values)	1.2×
Pilot Travel Centers LLC	VA0092657	VA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 1 mg/L, new	Dec 1, 2027	96.1 mg/L (3 values)	96.1×
Pilot Travel Centers LLC	VA0092657	VA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 1 mg/L, new	Dec 1, 2027	96.1 mg/L (3 values)	96.1×
Pilot Travel Centers LLC	VA0092762	VA	Industrial	—	Nitrogen, ammonia total [as N]	daily maximum 0.33 mg/L, new	Jan 1, 2028	7.33 mg/L (3 values)	22.2×
Pilot Travel Centers LLC	VA0092762	VA	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 0.33 mg/L, new	Jan 1, 2028	7.33 mg/L (3 values)	22.2×
Grantsville, Town of	MD0020761	MD	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2 mg/L (May–Oct), tighter	Jan 1, 2028	21.01 mg/L (5 values)	10.5×
Grantsville, Town of	MD0020761	MD	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 10 lb/d (May–Oct), tighter	Jan 1, 2028	84.46 lb/d (5 values)	8.45×
Grantsville, Town of	MD0020761	MD	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum daily average 35 lb/d (May–Oct), tighter	Jan 1, 2028	134.5 lb/d (5 values)	3.84×
Grantsville, Town of	MD0020761	MD	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum daily average 6.9 mg/L (May–Oct), tighter	Jan 1, 2028	25.6 mg/L (5 values)	3.71×
SLC WATER RECLAMATION FACILITY	UT0021725	UT	Sewage plant, major	56 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5.8 mg/L (Mar–May), tighter	Jan 1, 2028	14 mg/L (3 values)	2.41×
Pittsylvania County Schools	VA0027693	VA	Sewage plant	.012 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L, tighter	Feb 1, 2028	2.8 mg/L (9 values)	1.75×
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×
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×
BARKEYVILLE SEWERAGE LLC	PA0025607	PA	Industrial	.15 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L (May–Oct), tighter	Jun 1, 2028	2.77 mg/L (3 values)	2.13×
GCP COUNTRYSIDE LP	PA0102652	PA	Industrial	.05 MGD	Nitrogen, ammonia total [as N]	monthly average 1.4 mg/L (May–Oct), tighter	Jun 1, 2028	1.8 mg/L (3 values)	1.29×
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×
GCP COUNTRYSIDE LP	PA0102652	PA	Industrial	.05 MGD	Nitrogen, ammonia total [as N]	monthly average 4.2 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2028	4.6 mg/L (5 values)	1.1×
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×
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×
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Aug 31, 2028	16 mg/L (11 values)	7.8×
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 171 lb/d, tighter	Aug 31, 2028	836 lb/d (11 values)	4.89×
STARKVILLE POTW	MS0036145	MS	Sewage plant, major	10 MGD	Nitrogen, ammonia total [as N]	monthly average 114 lb/d, tighter	Aug 31, 2028	348 lb/d (11 values)	3.05×
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×
Poyntsource Solutions, Inc.	GA0035491	GA	Industrial	.149 MGD	Nitrogen, ammonia total [as N]	monthly average 17.4 mg/L, new	Sep 1, 2028	34.6 mg/L (12 values)	1.99×
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×
PRAIRIE PATH WATER COMPANY	IL0070874	IL	Industrial	.0504 MGD	Nitrogen, ammonia total [as N]	daily maximum 4.4 mg/L (Mar, Apr, May, Sep, Oct), new	Oct 1, 2028	18.5 mg/L (4 values)	4.2×
PRAIRIE PATH WATER COMPANY	IL0070874	IL	Industrial	.0504 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.1 mg/L (Jun–Aug), new	Oct 1, 2028	12 mg/L (3 values)	2.35×
PRAIRIE PATH WATER COMPANY	IL0070874	IL	Industrial	.0504 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.2 mg/L (Jan, Feb, Nov, Dec), new	Oct 1, 2028	10.6 mg/L (4 values)	2.04×
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×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.44 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2028	2.015 mg/L (6 values)	4.58×
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×
Town of Ochlocknee	GA0046370	GA	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	weekly average 0.7 lb/d, tighter	Nov 1, 2028	2.2 lb/d (11 values)	3.14×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.06 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2028	0.185 lb/d (6 values)	3.08×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.27 mg/L (May–Oct), tighter	Nov 1, 2028	0.82 mg/L (3 values)	3.04×
Town of Ochlocknee	GA0046370	GA	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L, tighter	Nov 1, 2028	3.8 mg/L (11 values)	2.92×
Town of Ochlocknee	GA0046370	GA	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	weekly average 2 mg/L, tighter	Nov 1, 2028	5.7 mg/L (11 values)	2.85×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.03 lb/d (May–Oct), tighter	Nov 1, 2028	0.08 lb/d (3 values)	2.67×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum daily average 1.1 mg/L (May–Oct), tighter	Nov 1, 2028	2.84 mg/L (3 values)	2.58×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum daily average 2.01 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2028	4.945 mg/L (6 values)	2.46×
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×
Town of Ochlocknee	GA0046370	GA	Sewage plant	.05 MGD	Nitrogen, ammonia total [as N]	monthly average 0.5 lb/d, tighter	Nov 1, 2028	1 lb/d (11 values)	2×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum daily average 0.13 lb/d (May–Oct), tighter	Nov 1, 2028	0.26 lb/d (3 values)	2×
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×
Legacy Enterprises LLC	MD0057487	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum daily average 0.25 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2028	0.455 lb/d (6 values)	1.82×
LANDSMAN, LLC.	MD0023272	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 1.3 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2028	1.63 mg/L (6 values)	1.25×
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×
Hopewell City	VA0066630	VA	Sewage plant, major	50 MGD	Nitrogen, ammonia total [as N]	monthly average 2.32 mg/L, tighter	Dec 1, 2028	6.44 mg/L (11 values)	2.78×
Hopewell City	VA0066630	VA	Sewage plant, major	50 MGD	Nitrogen, ammonia total [as N]	daily maximum 4.8 mg/L, tighter	Dec 1, 2028	11.33 mg/L (11 values)	2.36×
Hopewell City	VA0066630	VA	Sewage plant, major	50 MGD	Nitrogen, ammonia total [as N]	monthly average 308 kg/d, tighter	Dec 1, 2028	575 kg/d (11 values)	1.87×
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×
MT. CARMEL WOODS WWTP	MD0053228	MD	Sewage plant	.021 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.62 mg/L (May–Oct), tighter	Jan 1, 2029	1.096 mg/L (5 values)	1.77×
MT. CARMEL WOODS WWTP	MD0053228	MD	Sewage plant	.021 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.5 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jan 1, 2029	1.521 mg/L (6 values)	1.01×
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×
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×
City of Franklin Springs	GA0050172	GA	Sewage plant	.1 MGD	Nitrogen, ammonia total [as N]	monthly average 17.4 mg/L, new	Apr 1, 2029	19.85 mg/L (12 values)	1.14×
City of Wrightsville	GA0032395	GA	Sewage plant	.7452 MGD	Nitrogen, ammonia total [as N]	monthly average 1 mg/L, tighter	May 1, 2029	11.43 mg/L (11 values)	11.4×
City of Wrightsville	GA0032395	GA	Sewage plant	.7452 MGD	Nitrogen, ammonia total [as N]	weekly average 1.5 mg/L, tighter	May 1, 2029	14 mg/L (11 values)	9.33×
City of Wrightsville	GA0032395	GA	Sewage plant	.7452 MGD	Nitrogen, ammonia total [as N]	monthly average 6.2 lb/d, tighter	May 1, 2029	39.15 lb/d (11 values)	6.31×
City of Wrightsville	GA0032395	GA	Sewage plant	.7452 MGD	Nitrogen, ammonia total [as N]	weekly average 7.8 lb/d, tighter	May 1, 2029	48.4 lb/d (11 values)	6.21×
SUN ASSOCIATION ISLAND RV LLC	NY0257583	NY	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 2 lb/d (Jun–Oct), new	May 1, 2029	10.3 lb/d (3 values)	5.15×
SUN ASSOCIATION ISLAND RV LLC	NY0257583	NY	Industrial	—	Nitrogen, ammonia total [as N]	monthly average 4.7 mg/L (Jun–Oct), new	May 1, 2029	10.3 mg/L (3 values)	2.19×
Zimmerman city of	MN0042331	MN	Sewage plant	.87 MGD	Nitrogen, ammonia total [as N]	monthly average 10 mg/L (Jan, Feb, Mar, Dec), tighter	Jun 1, 2029	17.5 mg/L (4 values)	1.75×
WOODLAND BIGLER AREA AUTH	PA0115231	PA	Industrial	.225 MGD	Nitrogen, ammonia total [as N]	monthly average 9.83 mg/L, new	Jun 1, 2029	16.78 mg/L (9 values, 1 below detection)	1.71×
WOODLAND BIGLER AREA AUTH	PA0115231	PA	Industrial	.225 MGD	Nitrogen, ammonia total [as N]	weekly average 14.74 mg/L, new	Jun 1, 2029	23.81 mg/L (9 values, 1 below detection)	1.62×
SHENANDOAH MUNI SEW AUTH SCHUYLKILL CNTY	PA0070386	PA	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	monthly average 6.12 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Jun 1, 2029	7.395 mg/L (6 values)	1.21×
HARRISON CO UTILITY AUTHORITY, DELISLE WASTEWATER TREATMENT FACILITY	MS0052574	MS	Sewage plant	.2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 ug/L, tighter	Jun 22, 2029	1266 ug/L (4 values)	924×
CHEMICALS INCORPORATED	TX0118427	TX	Industrial	.39 MGD	Nitrogen, ammonia total [as N]	daily average 11.5 mg/L, tighter	Jul 1, 2029	18.5 mg/L (9 values)	1.61×
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	monthly average 0.46 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Aug 1, 2029	25.7 mg/L (6 values)	55.9×
Village of Antwerp WWTP	OH0022195	OH	Sewage plant	.33 MGD	Nitrogen, ammonia total [as N]	monthly average 0.2 mg/L (May–Oct), new	Aug 1, 2029	7.38 mg/L (5 values)	36.9×
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×
COALDALE-LANSFORD-SUMMIT HILL SEWER AUTHORITY	PA0026476	PA	Sewage plant, major	1.65 MGD	Nitrogen, ammonia total [as N]	monthly average 9.18 mg/L (Jan, Feb, Mar, Apr, May, Oct, Nov, Dec), tighter	Aug 1, 2029	13.75 mg/L (8 values)	1.5×
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×
COALDALE-LANSFORD-SUMMIT HILL SEWER AUTHORITY	PA0026476	PA	Sewage plant, major	1.65 MGD	Nitrogen, ammonia total [as N]	weekly average 18.36 mg/L (Jan, Feb, Mar, Apr, May, Oct, Nov, Dec), tighter	Aug 1, 2029	18.8 mg/L (8 values)	1.02×
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×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	monthly average 0.72 mg/L (May–Oct), tighter	Oct 1, 2029	1.648 mg/L (6 values)	2.29×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	7-day average 1.8 mg/L (May–Oct), tighter	Oct 1, 2029	2.46 mg/L (6 values)	1.37×
Orange County Public Schools	VA0060330	VA	Sewage plant	.0047 MGD	Nitrogen, ammonia total [as N]	monthly average 1.3 mg/L, tighter	Nov 1, 2029	1.76 mg/L (9 values)	1.35×
Orange County Public Schools	VA0060330	VA	Sewage plant	.0047 MGD	Nitrogen, ammonia total [as N]	weekly average 1.3 mg/L, tighter	Nov 1, 2029	1.76 mg/L (9 values)	1.35×
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	monthly average 1.39 mg/L, tighter	Dec 30, 2029	3.33 mg/L (11 values)	2.4×
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.1 mg/L, tighter	Dec 30, 2029	3.33 mg/L (11 values)	1.59×
JACKSON COUNTY UTILITY AUTHORITY, POTW 1C	MS0045446	MS	Sewage plant, major	5 MGD	Nitrogen, ammonia total [as N]	monthly average 80.1 lb/d, tighter	Dec 30, 2029	97.49 lb/d (11 values)	1.22×
WESTERN SUGAR COOP -S.BLUFF	NE0111686	NE	Industrial, major	6.21 MGD	Nitrogen, ammonia total [as N]	monthly average 4.94 mg/L (Jan, Feb, Nov, Dec), tighter	Jan 1, 2030	18.29 mg/L (4 values)	3.7×
WESTERN SUGAR COOP -S.BLUFF	NE0111686	NE	Industrial, major	6.21 MGD	Nitrogen, ammonia total [as N]	daily maximum 8.16 mg/L (Jan, Feb, Nov, Dec), tighter	Jan 1, 2030	21.45 mg/L (4 values)	2.63×
WESTERN SUGAR COOP -S.BLUFF	NE0111686	NE	Industrial, major	6.21 MGD	Nitrogen, ammonia total [as N]	monthly average 81.13 kg/d (Jan, Feb, Nov, Dec), tighter	Jan 1, 2030	173.2 kg/d (4 values)	2.14×
WESTERN SUGAR COOP -S.BLUFF	NE0111686	NE	Industrial, major	6.21 MGD	Nitrogen, ammonia total [as N]	daily maximum 134.05 kg/d (Jan, Feb, Nov, Dec), tighter	Jan 1, 2030	249.8 kg/d (4 values)	1.86×
WINONA POTW	MS0021024	MS	Sewage plant, major	1.2 MGD	Nitrogen, ammonia total [as N]	monthly average 1.5 mg/L, tighter	Apr 29, 2030	2.21 mg/L (9 values)	1.47×
WINONA POTW	MS0021024	MS	Sewage plant, major	1.2 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.2 mg/L, tighter	Apr 29, 2030	3.18 mg/L (9 values)	1.45×
PC Oak Village MHC LLC	VA0072389	VA	Industrial	.015 MGD	Nitrogen, ammonia total [as N]	monthly average 2 mg/L, tighter	May 1, 2030	4.5 mg/L (3 values)	2.25×
PC Oak Village MHC LLC	VA0072389	VA	Industrial	.015 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2 mg/L, tighter	May 1, 2030	4.5 mg/L (3 values)	2.25×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1 mg/L (May–Oct), tighter	Jun 1, 2030	12.59 mg/L (6 values)	12.6×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 3.2 lb/d (May–Oct), tighter	Jun 1, 2030	15.37 lb/d (6 values)	4.8×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum daily average 4.5 mg/L (May–Oct), tighter	Jun 1, 2030	12.88 mg/L (4 values)	2.86×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum daily average 14 lb/d (May–Oct), tighter	Jun 1, 2030	15.94 lb/d (4 values)	1.14×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.4 mg/L (May–Oct), tighter	Oct 1, 2030	12.59 mg/L (6 values)	31.5×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum daily average 1.4 mg/L (May–Oct), tighter	Oct 1, 2030	12.88 mg/L (4 values)	9.2×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.8 lb/d (May–Oct), tighter	Oct 1, 2030	15.38 lb/d (6 values)	8.54×
Town of Hancock	MD0024562	MD	Sewage plant	.38 MGD	Nitrogen, ammonia total [as N]	maximum daily average 6.2 lb/d (May–Oct), tighter	Oct 1, 2030	15.94 lb/d (4 values)	2.57×
Middletown Town	VA0020982	VA	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L (Jan–May), tighter	Oct 1, 2030	2.88 mg/L (5 values)	1.8×
Middletown Town	VA0020982	VA	Sewage plant	.6 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.7 mg/L (Jan–May), tighter	Oct 1, 2030	4 mg/L (5 values)	1.48×
OMAHA PAPILLION CREEK WWTF	NE0112810	NE	Sewage plant, major	55 MGD	Nitrogen, ammonia total [as N]	monthly average 28.7 mg/L (Mar–May), tighter	Oct 1, 2032	30.1 mg/L (3 values)	1.05×
OMAHA PAPILLION CREEK WWTF	NE0112810	NE	Sewage plant, major	55 MGD	Nitrogen, ammonia total [as N]	daily maximum 38.1 mg/L (Mar–May), tighter	Oct 1, 2032	39.4 mg/L (3 values)	1.03×
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5.4 lb/d, new	Oct 23, 2026	under 3 values	—
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 5 mg/L, new	Oct 23, 2026	under 3 values	—
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 8.1 lb/d, new	Oct 23, 2026	under 3 values	—
BEAUMONT POTW	MS0020869	MS	Sewage plant	.13 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 7.5 mg/L, new	Oct 23, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 18 lb/d, tighter	Oct 24, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 12 mg/L, tighter	Oct 24, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 18 mg/L, tighter	Oct 24, 2026	under 3 values	—
KILMICHAEL POTW	MS0020001	MS	Sewage plant	.18 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 27 lb/d, tighter	Oct 24, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.74 lb/d, tighter	Oct 26, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, tighter	Oct 26, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, tighter	Oct 26, 2026	under 3 values	—
BASSFIELD POTW	MS0024848	MS	Sewage plant	.065 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 1.11 lb/d, tighter	Oct 26, 2026	under 3 values	—
SOUTHERN CARROLL H.S. WWTP	MD0024589	MD	Sewage plant	—	Nitrogen, ammonia total [as N]	maximum monthly average 3.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2026	3.1 mg/L (6 values)	0.912×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.42 mg/L (May–Oct), tighter	Nov 1, 2026	0.2 mg/L (4 values)	0.476×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	monthly average 0.28 mg/L (May–Oct), tighter	Nov 1, 2026	0.095 mg/L (4 values)	0.339×
Homestead Mobile Estates WWTP	MD0024961	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 1.5 mg/L (May–Oct), tighter	Nov 1, 2026	0.45 mg/L (5 values)	0.3×
Homestead Mobile Estates WWTP	MD0024961	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 2.7 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2026	0.45 mg/L (6 values)	0.167×
SOUTHERN CARROLL H.S. WWTP	MD0024589	MD	Sewage plant	—	Nitrogen, ammonia total [as N]	maximum monthly average 1.4 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2026	0.195 lb/d (6 values)	0.139×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	weekly maximum 0.67 kg/d (May–Oct), tighter	Nov 1, 2026	0.0875 kg/d (4 values)	0.131×
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	monthly average 6.7 mg/L (May–Oct), new	Nov 1, 2026	0.643 mg/L (5 values)	0.096×
North Lewisburg, Village of	OH0023582	OH	Sewage plant	.42 MGD	Nitrogen, ammonia total [as N]	monthly average 0.45 kg/d (May–Oct), tighter	Nov 1, 2026	0.0375 kg/d (4 values)	0.0833×
Homestead Mobile Estates WWTP	MD0024961	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.5 lb/d (May–Oct), tighter	Nov 1, 2026	0.041 lb/d (5 values)	0.082×
SOUTHERN CARROLL H.S. WWTP	MD0024589	MD	Sewage plant	—	Nitrogen, ammonia total [as N]	maximum monthly average 1.5 mg/L (May–Oct), tighter	Nov 1, 2026	0.1 mg/L (5 values)	0.0667×
Homestead Mobile Estates WWTP	MD0024961	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.89 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Nov 1, 2026	0.056 lb/d (6 values)	0.0629×
Homestead Mobile Estates WWTP	MD0024961	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum daily average 10.3 mg/L (May–Oct), tighter	Nov 1, 2026	0.45 mg/L (5 values)	0.0437×
SOUTHERN CARROLL H.S. WWTP	MD0024589	MD	Sewage plant	—	Nitrogen, ammonia total [as N]	maximum daily average 7.1 mg/L (May–Oct), tighter	Nov 1, 2026	0.2 mg/L (5 values)	0.0282×
SOUTHERN CARROLL H.S. WWTP	MD0024589	MD	Sewage plant	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.63 lb/d (May–Oct), tighter	Nov 1, 2026	0 lb/d (5 values)	0×
SOUTHERN CARROLL H.S. WWTP	MD0024589	MD	Sewage plant	—	Nitrogen, ammonia total [as N]	maximum daily average 3 lb/d (May–Oct), tighter	Nov 1, 2026	0 lb/d (5 values)	0×
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 4.8 lb/d (Nov), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 2.3 mg/L (Nov), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 7.1 lb/d (Jan), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 3.4 mg/L (Jan), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 4 mg/L (Feb), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 8.2 lb/d (Feb), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 7.1 lb/d (Mar), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 3.4 mg/L (Mar), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1.7 mg/L (May), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 3.6 lb/d (May), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 2.7 lb/d (Jun), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1.3 mg/L (Jun), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1 mg/L (Jul), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 2.1 lb/d (Jul), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 2.2 lb/d (Sep), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1.1 mg/L (Sep), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 3.2 lb/d (Apr), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1.5 mg/L (Apr), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1.6 mg/L (Oct), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 3.2 lb/d (Oct), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 2 lb/d (Aug), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 1 mg/L (Aug), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 2.5 mg/L (Dec), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	30-day average 5.2 lb/d (Dec), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.7 mg/L (Nov), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.5 lb/d (Nov), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 19.9 mg/L (Jan), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 41.5 lb/d (Jan), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 17.5 lb/d (Feb), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 8.4 mg/L (Feb), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 8.1 lb/d (Mar), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 3.9 mg/L (Mar), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 3.2 mg/L (May), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 6.7 lb/d (May), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 3.2 mg/L (Jun), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 6.7 lb/d (Jun), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 3.2 mg/L (Jul), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 6.7 lb/d (Jul), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.7 mg/L (Sep), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.5 lb/d (Sep), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 9.8 lb/d (Apr), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 4.7 mg/L (Apr), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.5 lb/d (Oct), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.7 mg/L (Oct), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 5.5 lb/d (Aug), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 2.7 mg/L (Aug), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 3.9 mg/L (Dec), new	Nov 1, 2026	under 3 values	—
CITY OF RICKARDSVILLE	IA0066311	IA	Sewage plant	.0645 MGD	Nitrogen, ammonia total [as N]	daily maximum 8.1 lb/d (Dec), new	Nov 1, 2026	under 3 values	—
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	monthly average 48.2 kg/d (May–Oct), new	Nov 1, 2026	under 3 values	—
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	weekly maximum 72.6 kg/d (May–Oct), new	Nov 1, 2026	under 3 values	—
Mahoning County Commissioners	OH0024325	OH	Sewage plant, major	1.9 MGD	Nitrogen, ammonia total [as N]	weekly maximum 10.1 mg/L (May–Oct), new	Nov 1, 2026	under 3 values	—
RIVER RANCH MUD 1	TX0137901	TX	Sewage plant	.9 MGD	Nitrogen, ammonia total [as N]	daily maximum 10 mg/L, tighter	Nov 1, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 6.4 lb/d, tighter	Nov 6, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.5 mg/L, tighter	Nov 6, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 9.6 lb/d, tighter	Nov 6, 2026	under 3 values	—
PURVIS POTW	MS0036536	MS	Sewage plant	.5 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.3 mg/L, tighter	Nov 6, 2026	under 3 values	—
Presto Distribution Center	MS0058122	MS	Sewage plant	.015 MGD	Nitrogen, ammonia total [as N]	daily maximum 0.18 lb/d, tighter	Nov 13, 2026	under 3 values	—
Presto Distribution Center	MS0058122	MS	Sewage plant	.015 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 0.12 lb/d, tighter	Nov 13, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 9 lb/d, new	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1.37 mg/L, new	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 13 lb/d, new	Nov 21, 2026	under 3 values	—
LAMBERT POTW	MS0020231	MS	Sewage plant	.75 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 2.05 mg/L, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 16.68 lb/d, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 8 mg/L, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 25.02 lb/d, new	Nov 21, 2026	under 3 values	—
LIBERTY POTW	MS0023752	MS	Sewage plant	.25 MGD	Nitrogen, ammonia total [as N]	maximum weekly average 12 mg/L, new	Nov 21, 2026	under 3 values	—
HUSTON TWP MUNI AUTH CLEARFIELD CNTY	PA0228346	PA	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	monthly average 6 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), new	Dec 1, 2026	3.808 mg/L (5 values, 2 below detection)	0.635×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	weekly maximum 2.4 mg/L (May–Oct), tighter	Dec 1, 2026	0.49 mg/L (4 values)	0.204×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	monthly average 0.74 kg/d (May–Oct), tighter	Dec 1, 2026	0.13 kg/d (4 values)	0.176×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	monthly average 1.6 mg/L (May–Oct), tighter	Dec 1, 2026	0.25 mg/L (4 values)	0.156×
Waynesfield, Village of	OH0028029	OH	Sewage plant	.123 MGD	Nitrogen, ammonia total [as N]	weekly maximum 1.1 kg/d (May–Oct), tighter	Dec 1, 2026	0.17 kg/d (4 values)	0.155×
HUSTON TWP MUNI AUTH CLEARFIELD CNTY	PA0228346	PA	Sewage plant	.15 MGD	Nitrogen, ammonia total [as N]	monthly average 7.5 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), new	Dec 1, 2026	1 lb/d (5 values, 2 below detection)	0.133×
Cecil County Dept. of Public Works	MD0052027	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 1 mg/L (May–Oct), tighter	Dec 1, 2026	0.11 mg/L (5 values)	0.11×
Cecil County Dept. of Public Works	MD0052027	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 16.7 lb/d (May–Oct), tighter	Dec 1, 2026	1.25 lb/d (5 values)	0.0749×
Cecil County Dept. of Public Works	MD0052027	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum daily average 4.6 mg/L (May–Oct), tighter	Dec 1, 2026	0.18 mg/L (5 values)	0.0391×
Cecil County Dept. of Public Works	MD0052027	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum daily average 76.7 lb/d (May–Oct), tighter	Dec 1, 2026	2.11 lb/d (5 values)	0.0275×
Hampton Roads Sanitation District	VA0026263	VA	Sewage plant	.1 MGD	Nitrogen, ammonia total [as N]	monthly average 2.91 mg/L (May–Oct), tighter	Dec 1, 2026	0.07 mg/L (5 values)	0.0241×
Cecil County Dept. of Public Works	MD0052027	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 65 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Dec 1, 2026	1 lb/d (6 values)	0.0154×
Hampton Roads Sanitation District	VA0026263	VA	Sewage plant	.1 MGD	Nitrogen, ammonia total [as N]	monthly average 6.79 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Dec 1, 2026	0.09 mg/L (6 values)	0.0133×
Cecil County Dept. of Public Works	MD0052027	MD	Sewage plant, major	2 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 3.9 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Dec 1, 2026	0.025 mg/L (6 values)	0.00641×
HIGHLAND VIEW ACADEMY, INC.	MD0024627	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 2.2 mg/L (May–Oct), tighter	Dec 1, 2026	0 mg/L (5 values)	0×
HIGHLAND VIEW ACADEMY, INC.	MD0024627	MD	Industrial	—	Nitrogen, ammonia total [as N]	maximum monthly average 0.55 lb/d (May–Oct), tighter	Dec 1, 2026	0 lb/d (5 values)	0×
ROCKY GAP STATE PARK WWTP	MD0051667	MD	Industrial	.08 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2.2 mg/L (May–Oct), tighter	Dec 1, 2026	0 mg/L (5 values)	0×
ROCKY GAP STATE PARK WWTP	MD0051667	MD	Industrial	.08 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 2.8 lb/d (May–Oct), tighter	Dec 1, 2026	0 lb/d (5 values)	0×
ROCKY GAP STATE PARK WWTP	MD0051667	MD	Industrial	.08 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 3.8 mg/L (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Dec 1, 2026	0 mg/L (6 values)	0×
ROCKY GAP STATE PARK WWTP	MD0051667	MD	Industrial	.08 MGD	Nitrogen, ammonia total [as N]	maximum monthly average 4.8 lb/d (Jan, Feb, Mar, Apr, Nov, Dec), tighter	Dec 1, 2026	0 lb/d (6 values)	0×
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 22 lb/d (Dec), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 2.6 mg/L (Dec), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 33 lb/d (Feb), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 4 mg/L (Feb), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 28.4 lb/d (Mar), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 3.4 mg/L (Mar), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 1.9 mg/L (Apr), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 15.8 lb/d (Apr), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 2.2 mg/L (May), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 18 lb/d (May), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 1.6 mg/L (Jun), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 13.6 lb/d (Jun), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 1 mg/L (Aug), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 8 lb/d (Aug), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 1.7 mg/L (Oct), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 13.8 lb/d (Oct), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 20.6 lb/d (Nov), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 2.5 mg/L (Nov), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 8.4 lb/d (Jul), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 1 mg/L (Jul), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 8.8 lb/d (Sep), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 1.1 mg/L (Sep), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 28.4 lb/d (Jan), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	30-day average 3.4 mg/L (Jan), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 3.9 mg/L (Dec), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 32.5 lb/d (Dec), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 70.1 lb/d (Feb), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 8.4 mg/L (Feb), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 3.9 mg/L (Mar), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 32.4 lb/d (Mar), new	Dec 1, 2026	under 3 values	—
CITY OF TEMPLETON	IA0033782	IA	Sewage plant	—	Nitrogen, ammonia total [as N]	daily maximum 4.7 mg/L (Apr), new	Dec 1, 2026	under 3 values	—

The 300 soonest limits are listed, plants already above them first; all 5827 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=OH&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