In Arkansas: 58 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Nov 1, 2026 and Oct 1, 2029 (123 limits); 37 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
Landers BCO, LLC d/b/a Crossroads Village	AR0050563	AR	Industrial	.05 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Nov 1, 2026	1 mg/L (11 values)	90.9×
Pleasant View Estates Improvement District Number 1 of Pope County	AR0046396	AR	Sewage plant	.15 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jan 1, 2027	0.16 mg/L (11 values)	14.5×
Ozark Interests, Inc - Camp Ozark	AR0048275	AR	Industrial	.091 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Feb 1, 2027	0.07 mg/L (3 values)	6.36×
Prescott, City of - Prescott Wastewater Treatment Plant	AR0033481	AR	Sewage plant	.85 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Mar 1, 2027	1.35 mg/L (11 values)	123×
Spring Hill School District	AR0046345	AR	Industrial	.02 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Mar 1, 2027	0.5 mg/L (11 values)	45.5×
Smackover, City of	AR0021440	AR	Sewage plant	.5 MGD	Chlorine, total residual	instantaneous maximum 0.014 mg/L, new	Mar 1, 2027	0.2 mg/L (11 values)	14.3×
Norphlet, City of - Norphlet Wastewater Treatment System	AR0035653	AR	Sewage plant	.18 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Mar 1, 2027	0.15 mg/L (11 values)	13.6×
Dierks, City of - Dierks Wastewater Treatment Facility	AR0021709	AR	Sewage plant	.23 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Mar 1, 2027	0.105 mg/L (10 values)	9.55×
Mentor ABI, LLC d/b/a NeuroRestorative Timber Ridge	AR0041416	AR	Industrial	.012 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Mar 1, 2027	0.08 mg/L (3 values, 1 below detection)	7.27×
Westside Consolidated School District No. 5	AR0041629	AR	Industrial	.03 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Apr 1, 2027	0.05 mg/L (3 values)	4.55×
MHJH Properties, LLC - Jackson Point	AR0052884	AR	Industrial	.005 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jun 1, 2027	0.14 mg/L (3 values)	12.7×
Eagle Ridge Utility Operating Company, LLC-Eaglebrook Subdivision WWTF	AR0050717	AR	Industrial	.029 MGD	Phosphorus, total [as P]	monthly average 1 mg/L, new	Jun 1, 2027	3.65 mg/L (3 values)	3.65×
Eagle Ridge Utility Operating Company, LLC-Eaglebrook Subdivision WWTF	AR0050717	AR	Industrial	.029 MGD	Phosphorus, total [as P]	daily maximum 1.5 mg/L, new	Jun 1, 2027	4.33 mg/L (3 values)	2.89×
Nevada School District # 1 - Nevada High School	AR0042439	AR	Industrial	.025 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jun 1, 2027	0.015 mg/L (3 values, 1 below detection)	1.36×
Eagle Ridge Utility Operating Company, LLC-Eaglebrook Subdivision WWTF	AR0050717	AR	Industrial	.029 MGD	Phosphorus, total [as P]	monthly average 0.2 lb/d, new	Jun 1, 2027	0.24 lb/d (3 values)	1.2×
Glen Rose Public School	AR0046817	AR	Industrial	.024 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2027	1.02 mg/L (3 values)	92.7×
Arkansas Department of Parks, Heritage, & Tourism - Petit Jean State Park	AR0049972	AR	Industrial	.08 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2027	0.05 mg/L (11 values)	4.55×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Lead, total recoverable	monthly average 3.8 ug/L, new	Jul 1, 2027	12 ug/L (9 values)	3.16×
Rison , City of	AR0021695	AR	Sewage plant	.31 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2027	0.03 mg/L (8 values, 1 below detection)	2.73×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Lead, total recoverable	daily maximum 7.62 ug/L, new	Jul 1, 2027	12 ug/L (9 values)	1.57×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Zinc, total recoverable	monthly average 115.62 ug/L, new	Jul 1, 2027	150 ug/L (9 values)	1.3×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Mercury, total recoverable	monthly average 0.0134 ug/L, new	Jul 1, 2027	0.016 ug/L (11 values)	1.19×
Joali Investments I, LLC, d/b/a Malvern Series, LLC - Gateway of Malvern	AR0042889	AR	Industrial	.01 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Aug 1, 2027	0.04 mg/L (3 values, 1 below detection)	3.64×
Perryville, City of	AR0020125	AR	Sewage plant	.15 MGD	Chlorine, total residual	instantaneous maximum 0.02 mg/L, new	Oct 1, 2027	1.53 mg/L (11 values)	76.5×
Harbor South Improvement District #1 of Montgomery County	AR0042293	AR	Sewage plant	.036 MGD	Chlorine, total residual	instantaneous maximum 0.191 mg/L, new	Oct 1, 2027	2.2 mg/L (3 values)	11.5×
Weiner, City of	AR0020354	AR	Sewage plant	.6 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Nov 1, 2027	3.5 mg/L (11 values)	318×
Randall Christy - Statue Road Inn	AR0044300	AR	Industrial	.0075 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Mar 1, 2028	0.04 mg/L (4 values, 1 below detection)	3.64×
Bradford, City of	AR0050911	AR	Sewage plant	.2 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Apr 1, 2028	2.59 mg/L (9 values)	235×
Recovery Centers of Arkansas, Inc. - Oasis Renewal Center	AR0045560	AR	Industrial	—	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2028	0.03 mg/L (3 values, 1 below detection)	2.73×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	E. coli	30-day geometric mean 126 #/100mL (May–Sep), new	Jul 1, 2028	154.2 #/100mL (4 values)	1.22×
JH Mart, Inc.	AR0046086	AR	Industrial	.005 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Aug 1, 2028	1.12 mg/L (12 values)	102×
Mill Pond LLC-Mill Pond Village	AR0041319	AR	Industrial	.023 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Oct 1, 2028	0.015 mg/L (4 values)	1.36×
Lincoln, City of	AR0035246	AR	Sewage plant	.5 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Oct 1, 2028	0.0115 mg/L (12 values)	1.05×
Bay, City of - Bay WWTF	AR0034312	AR	Sewage plant	.15 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Nov 1, 2028	2.18 mg/L (11 values)	198×
Gurdon, City of - Gurdon WWTP	AR0022551	AR	Sewage plant	.86 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Nov 1, 2028	0.33 mg/L (6 values)	30×
Lakeside Gardens Horizontal Property Regime - Lakeside Gardens WWTP	AR0050644	AR	Industrial	.01 MGD	Phosphorus, total [as P]	monthly average 2.3 mg/L, new	Dec 1, 2028	4.56 mg/L (3 values)	1.98×
Lakeside Gardens Horizontal Property Regime - Lakeside Gardens WWTP	AR0050644	AR	Industrial	.01 MGD	Phosphorus, total [as P]	daily maximum 3.5 mg/L, new	Dec 1, 2028	4.56 mg/L (3 values)	1.3×
Thomas S. Northern - dba Northern Mobile Home Park	AR0042188	AR	Industrial	.012 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Apr 1, 2029	0.8 mg/L (3 values)	72.7×
Arkansas Department of Corrections - Tucker Intermediate Reformatory	AR0035980	AR	Industrial	.5 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	May 1, 2029	0.34 mg/L (11 values)	30.9×
Sebastian Lake Utility Operating Company, LLC - Sebastian Lake Public Water	AR0051039	AR	Industrial	.02 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jun 1, 2029	0.04 mg/L (3 values)	3.64×
Arkansas Department of Human Services - Arkadelphia Human Development Center	AR0036749	AR	Industrial	.08 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2029	1.71 mg/L (11 values)	155×
Stephens, City of - Stephens Water Works	AR0020168	AR	Sewage plant	.2 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Aug 1, 2029	0.2 mg/L (11 values)	18.2×
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×
Wabbaseka, City of	AR0039896	AR	Sewage plant	.1 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Nov 1, 2026	under 3 values	—
London, City of - London Pollution Control Facility	AR0050946	AR	Sewage plant	.2 MGD	Chlorine, total residual	instantaneous maximum 0.14 mg/L, new	Dec 1, 2026	under 3 values	—
Helena Industries, Inc.	AR0022756	AR	Industrial	—	Endrin	monthly average 0.018 ug/L, new	Feb 1, 2027	0.0053 ug/L (7 values)	0.294×
Helena Industries, Inc.	AR0022756	AR	Industrial	—	Endrin	daily maximum 0.036 ug/L, new	Feb 1, 2027	0.0053 ug/L (7 values)	0.147×
Pine Ridge Mobile Home Community, LLC	AR0048402	AR	Industrial	.024 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Feb 1, 2027	0 mg/L (3 values)	0×
Mentor ABI, LLC d/b/a NeuroRestorative Timber Ridge	AR0041416	AR	Industrial	.012 MGD	Oil & Grease	daily maximum 1.5 lb/d, new	Mar 1, 2027	0.32 lb/d (3 values, 2 below detection)	—
Mentor ABI, LLC d/b/a NeuroRestorative Timber Ridge	AR0041416	AR	Industrial	.012 MGD	Oil & Grease	daily maximum 15 mg/L, new	Mar 1, 2027	5 mg/L (3 values, 2 below detection)	—
Mentor ABI, LLC d/b/a NeuroRestorative Timber Ridge	AR0041416	AR	Industrial	.012 MGD	Oil & Grease	monthly average 1 lb/d, new	Mar 1, 2027	0.32 lb/d (3 values, 2 below detection)	—
Mentor ABI, LLC d/b/a NeuroRestorative Timber Ridge	AR0041416	AR	Industrial	.012 MGD	Oil & Grease	monthly average 10 mg/L, new	Mar 1, 2027	5 mg/L (3 values, 2 below detection)	—
Norphlet, City of - Norphlet Wastewater Treatment System	AR0035653	AR	Sewage plant	.18 MGD	Chlorine, total residual	instantaneous maximum 0.02 mg/L, new	Mar 1, 2027	under 3 values	—
Booneville, City of	AR0021571	AR	Sewage plant	.98 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Apr 1, 2027	0.01 mg/L (11 values)	0.909×
HEPOA, LLC - Harbor East POA, LLC	AR0039403	AR	Industrial	.089 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Apr 1, 2027	0.02 mg/L (11 values, 8 below detection)	—
Hope, City of - Pate Creek Wastewater Treatment Plant	AR0038458	AR	Sewage plant	.8 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Apr 1, 2027	under 3 values	—
Montrose Waste Water Facilities	AR0041297	AR	Sewage plant	.108 MGD	Chloride [as Cl]	monthly average 75.1 lb/d, new	May 1, 2027	under 3 values	—
Montrose Waste Water Facilities	AR0041297	AR	Sewage plant	.108 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	May 1, 2027	under 3 values	—
Eagle Ridge Utility Operating Company, LLC-Eaglebrook Subdivision WWTF	AR0050717	AR	Industrial	.029 MGD	Phosphorus, total [as P]	daily maximum 0.4 lb/d, new	Jun 1, 2027	0.26 lb/d (3 values)	0.65×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Lead, total recoverable	monthly average 3.8 ug/L, new	Jul 1, 2027	3.6 ug/L (11 values)	0.947×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Copper, total recoverable	monthly average 12.2 ug/L, new	Jul 1, 2027	11 ug/L (9 values)	0.902×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Zinc, total recoverable	daily maximum 231.99 ug/L, new	Jul 1, 2027	150 ug/L (9 values)	0.647×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Mercury, total recoverable	daily maximum 0.0269 ug/L, new	Jul 1, 2027	0.016 ug/L (11 values)	0.595×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Lead, total recoverable	daily maximum 7.62 ug/L, new	Jul 1, 2027	3.6 ug/L (11 values)	0.472×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Copper, total recoverable	daily maximum 24.48 ug/L, new	Jul 1, 2027	11 ug/L (9 values)	0.449×
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Mercury, total recoverable	daily maximum 0.0269 ug/L, new	Jul 1, 2027	0.0099 ug/L (9 values)	0.368×
Wayne Farms LLC	AR0038768	AR	Industrial	1.3 MGD	Copper, total recoverable	monthly average 0.14 lb/d, new	Jul 1, 2027	0.0204 lb/d (11 values)	0.146×
Wayne Farms LLC	AR0038768	AR	Industrial	1.3 MGD	Copper, total recoverable	daily maximum 0.28 lb/d, new	Jul 1, 2027	0.0204 lb/d (11 values)	0.0729×
Wayne Farms LLC	AR0038768	AR	Industrial	1.3 MGD	Copper, total recoverable	monthly average 12.89 mg/L, new	Jul 1, 2027	0.0041 mg/L (11 values)	0.000318×
Wayne Farms LLC	AR0038768	AR	Industrial	1.3 MGD	Copper, total recoverable	daily maximum 25.87 mg/L, new	Jul 1, 2027	0.0041 mg/L (11 values)	0.000158×
Greenbrier, City of - Greenbrier WWTP	AR0036536	AR	Sewage plant	.98 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2027	under 3 values	—
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Cyanide, total recoverable	daily maximum 11.34 ug/L, new	Jul 1, 2027	10 ug/L (11 values, 10 below detection)	—
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Cyanide, total recoverable	monthly average 5.8 ug/L, new	Jul 1, 2027	10 ug/L (11 values, 10 below detection)	—
Lanxess Corporation - Central Plant	AR0001171	AR	Industrial, major	—	Mercury, total recoverable	monthly average 0.0134 ug/L, new	Jul 1, 2027	under 3 values	—
LANXESS Corporation - West Plant	AR0043516	AR	Industrial	—	Mercury, total recoverable	daily maximum 0.0269 ug/L, new	Jul 1, 2027	0.005 ug/L (11 values, 9 below detection)	—
LANXESS Corporation - West Plant	AR0043516	AR	Industrial	—	Mercury, total recoverable	monthly average 0.0134 ug/L, new	Jul 1, 2027	0.005 ug/L (11 values, 9 below detection)	—
Marble Falls Water, Sewer, & Solid Waste Suburban Improvement District No 1 WWTP	AR0034088	AR	Sewage plant	.01 MGD	BOD, carbonaceous [5 day, 20 C]	monthly average 0.8 lb/d, tighter	Jul 1, 2027	under 3 values	—
Marble Falls Water, Sewer, & Solid Waste Suburban Improvement District No 1 WWTP	AR0034088	AR	Sewage plant	.01 MGD	Nitrogen, ammonia total [as N]	monthly average 0.42 lb/d (May–Oct), tighter	Jul 1, 2027	under 3 values	—
Marble Falls Water, Sewer, & Solid Waste Suburban Improvement District No 1 WWTP	AR0034088	AR	Sewage plant	.01 MGD	Solids, total suspended	monthly average 1.3 lb/d, tighter	Jul 1, 2027	under 3 values	—
Woodlawn School District # 6	AR0048569	AR	Industrial	.008 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2027	0.07 mg/L (3 values, 2 below detection)	—
Horseshoe Bend, City of	AR0035254	AR	Sewage plant	.3 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Sep 1, 2027	0 mg/L (11 values)	0×
Arkansas Department of Parks, Heritage and Tourism - Lake Charles State Park	AR0038199	AR	Industrial	.065 MGD	Phosphorus, total [as P]	monthly average 0.54 lb/d, new	Oct 1, 2027	0.01 lb/d (11 values)	0.0185×
Arkansas Department of Parks, Heritage and Tourism - Lake Charles State Park	AR0038199	AR	Industrial	.065 MGD	Phosphorus, total [as P]	daily maximum 0.81 lb/d, new	Oct 1, 2027	0.01 lb/d (11 values)	0.0123×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	Coliform, fecal general	30-day geometric mean 200 #/100mL (May–Sep), new	Jul 1, 2028	162.1 #/100mL (4 values)	0.81×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	Coliform, fecal general	7-day geometric mean 400 #/100mL (May–Sep), new	Jul 1, 2028	245 #/100mL (4 values)	0.613×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	E. coli	7-day geometric mean 410 #/100mL (May–Sep), new	Jul 1, 2028	185 #/100mL (4 values)	0.451×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	E. coli	30-day geometric mean 630 #/100mL (Jan, Feb, Mar, Apr, Oct, Nov, Dec), new	Jul 1, 2028	35.4 #/100mL (7 values)	0.0562×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	E. coli	7-day geometric mean 2050 #/100mL (Jan, Feb, Mar, Apr, Oct, Nov, Dec), new	Jul 1, 2028	97 #/100mL (7 values)	0.0473×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	Coliform, fecal general	7-day geometric mean 2000 #/100mL (Jan, Feb, Mar, Apr, Oct, Nov, Dec), new	Jul 1, 2028	93 #/100mL (7 values)	0.0465×
Georgia-Pacific Crossett LLC-Crossett Paper Operations	AR0001210	AR	Industrial, major	—	Coliform, fecal general	30-day geometric mean 1000 #/100mL (Jan, Feb, Mar, Apr, Oct, Nov, Dec), new	Jul 1, 2028	43.3 #/100mL (7 values)	0.0433×
Maverick Tube Corporation	AR0046523	AR	Industrial	—	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Oct 1, 2028	under 3 values	—
Lakeside Gardens Horizontal Property Regime - Lakeside Gardens WWTP	AR0050644	AR	Industrial	.01 MGD	Phosphorus, total [as P]	monthly average 0.19 lb/d, new	Dec 1, 2028	0.07 lb/d (3 values)	0.368×
Lakeside Gardens Horizontal Property Regime - Lakeside Gardens WWTP	AR0050644	AR	Industrial	.01 MGD	Phosphorus, total [as P]	daily maximum 0.29 lb/d, new	Dec 1, 2028	0.1 lb/d (3 values)	0.345×
Fayetteville, City of - West Side Wastewater Treatment Facility	AR0050288	AR	Sewage plant, major	10 MGD	Nitrogen, nitrate total [as NO3]	7-day average 10 mg/L, new	Jan 1, 2029	4.2 mg/L (8 values)	0.42×
Fayetteville, City of - West Side Wastewater Treatment Facility	AR0050288	AR	Sewage plant, major	10 MGD	Nitrogen, nitrate total [as NO3]	monthly average 10 mg/L, new	Jan 1, 2029	2.7 mg/L (8 values)	0.27×
Fayetteville, City of - West Side Wastewater Treatment Facility	AR0050288	AR	Sewage plant, major	10 MGD	Nitrogen, nitrate total [as NO3]	monthly average 834 lb/d, new	Jan 1, 2029	184 lb/d (8 values)	0.221×
Sheridan School District #37 -East End Elementary/Intermediate Schools	AR0042862	AR	Industrial	.04 MGD	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jan 1, 2029	under 3 values	—
Hope, City of - Bois D'Arc WWTP	AR0038466	AR	Sewage plant, major	1.2 MGD	Copper, total recoverable	monthly average 10.2 ug/L, tighter	Mar 1, 2029	4.1 ug/L (7 values)	0.402×
Hope, City of - Bois D'Arc WWTP	AR0038466	AR	Sewage plant, major	1.2 MGD	Copper, total recoverable	7-day average 20.4 ug/L, tighter	Mar 1, 2029	4.1 ug/L (7 values)	0.201×
Hope, City of - Bois D'Arc WWTP	AR0038466	AR	Sewage plant, major	1.2 MGD	Copper, total recoverable	monthly average 0.1 lb/d, tighter	Mar 1, 2029	0 lb/d (7 values)	0×
Hope, City of - Bois D'Arc WWTP	AR0038466	AR	Sewage plant, major	1.2 MGD	Zinc, total recoverable	7-day average 193 ug/L, tighter	Mar 1, 2029	under 3 values	—
Hope, City of - Bois D'Arc WWTP	AR0038466	AR	Sewage plant, major	1.2 MGD	Zinc, total recoverable	monthly average 0.96 lb/d, tighter	Mar 1, 2029	under 3 values	—
Hope, City of - Bois D'Arc WWTP	AR0038466	AR	Sewage plant, major	1.2 MGD	Zinc, total recoverable	monthly average 96.4 ug/L, tighter	Mar 1, 2029	under 3 values	—
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	monthly average 10.2 ug/L (Jun–Nov), tighter	Jun 1, 2029	6.4 ug/L (3 values)	0.627×
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	daily maximum 20.4 ug/L (Jun–Nov), tighter	Jun 1, 2029	6.4 ug/L (3 values)	0.314×
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	monthly average 0.0051 lb/d (Jun–Nov), tighter	Jun 1, 2029	0.001 lb/d (3 values)	0.196×
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	daily maximum 0.01 lb/d (Jun–Nov), tighter	Jun 1, 2029	0.001 lb/d (3 values)	0.1×
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	daily maximum 90.7 ug/L (Jan, Feb, Mar, Apr, May, Dec), tighter	Jun 1, 2029	under 3 values	—
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	daily maximum 0.045 lb/d (Jan, Feb, Mar, Apr, May, Dec), tighter	Jun 1, 2029	under 3 values	—
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	monthly average 45.2 ug/L (Jan, Feb, Mar, Apr, May, Dec), tighter	Jun 1, 2029	under 3 values	—
St. Joseph's Utility Operating Company, LLC-St. Joseph's Glenn Subdivision	AR0050181	AR	Industrial	.06 MGD	Copper, total recoverable	monthly average 0.022 lb/d (Jan, Feb, Mar, Apr, May, Dec), tighter	Jun 1, 2029	under 3 values	—
Jesse Ferrel d/b/a Jesse Ferrel Rental Development	AR0049832	AR	Industrial	—	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Jul 1, 2029	0 mg/L (3 values)	0×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	monthly average 31.8 lb/d (May–Oct), tighter	Oct 1, 2029	18.54 lb/d (6 values)	0.583×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	monthly average 2.1 mg/L (Jan, Feb, Mar, Nov, Dec), tighter	Oct 1, 2029	1.036 mg/L (5 values)	0.493×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	7-day average 5.1 mg/L (Jan, Feb, Mar, Nov, Dec), tighter	Oct 1, 2029	2 mg/L (5 values)	0.392×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	monthly average 92.8 lb/d (Jan, Feb, Mar, Nov, Dec), tighter	Oct 1, 2029	33.7 lb/d (5 values)	0.363×
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrite + Nitrate total [as N]	instantaneous maximum 10 mg/L, new	Oct 1, 2029	under 3 values	—
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrite + Nitrate total [as N]	monthly average 442 lb/d, new	Oct 1, 2029	under 3 values	—
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	7-day average 1.9 mg/L (Apr), tighter	Oct 1, 2029	under 3 values	—
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	monthly average 0.76 mg/L (Apr), tighter	Oct 1, 2029	under 3 values	—
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Nitrogen, ammonia total [as N]	monthly average 33.6 lb/d (Apr), tighter	Oct 1, 2029	under 3 values	—
Siloam Springs, City of	AR0020273	AR	Sewage plant, major	5.3 MGD	Phosphorus, total [as P]	rolling average 0.5 mg/L, tighter	Oct 1, 2029	under 3 values	—

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=AR&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