In Arkansas, for Chlorine, total residual: 45 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Nov 1, 2026 and Aug 1, 2029 (46 limits); 32 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 · LA 78 · PA 70 · AR 45 · IA 20 · OH 16 · SC 8 · OR 6 · GA 4 · NY 4 · IL 3 · MS 3 · TN 3 · MI 2 · MO 2 · VA 2 · CO 1 · ME 1 · MN 1 · NE 1 · PR 1 · UT 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×
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×
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×
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×
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×
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×
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×
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	—
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×
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	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	May 1, 2027	under 3 values	—
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	—
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×
Maverick Tube Corporation	AR0046523	AR	Industrial	—	Chlorine, total residual	instantaneous maximum 0.011 mg/L, new	Oct 1, 2028	under 3 values	—
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	—
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×

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