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Plants facing new discharge limits — by state and pollutant

In Michigan, for Phosphorus, total [as P]: 7 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Sep 1, 2027 and Sep 1, 2029 (13 limits); 1 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 · GA 31 · OH 12 · MN 9 · MI 7 · NJ 7 · IL 6 · IN 6 · AR 4 · PA 4 · SC 3 · ID 2 · MD 2 · MS 2 · NY 2 · TX 2 · UT 2 · CO 1 · NH 1 · OR 1 · VA 1 · VT 1

By pollutant: all · Nitrogen, ammonia total [as N] 33 · Perfluorooctanesulfonate 9 · Phosphorus, total [as P] 7 · Thermal Discharge 3 · Chlorine, total residual 2 · Temperature, water deg. fahrenheit 2 · Arsenic, total [as As] 1 · BOD, carbonaceous [5 day, 20 C] 1 · Cyanide [A] 1 · Mercury, total [as Hg] 1 · Perfluorobutanesulfonic acid (PFBS) 1 · Perfluorohexane Sulfonate 1 · Perfluorononanoic acid (PFNA) 1 · Perfluorooctanoic acid (PFOA) 1 · pH 1 · Solids, total suspended 1 · Sulfide, dissolved, [as S] 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
City of AdrianMI0022152MISewage plant, major—Phosphorus, total [as P]monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighterOct 1, 20280.875 mg/L (6 values)1.09×
City of TrentonMI0021164MISewage plant, major—Phosphorus, total [as P]monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20270.665 mg/L (6 values)0.831×
South Huron Valley Utility AuthorityMI0043800MISewage plant, major—Phosphorus, total [as P]monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20270.65 mg/L (6 values)0.812×
City of RockwoodMI0021181MISewage plant, major—Phosphorus, total [as P]monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20270.55 mg/L (6 values)0.688×
City of TecumsehMI0020583MISewage plant, major—Phosphorus, total [as P]monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20270.491 mg/L (6 values)0.614×
City of TecumsehMI0020583MISewage plant, major—Phosphorus, total [as P]monthly average 11 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20272.62 lb/d (6 values)0.238×
City of TrentonMI0021164MISewage plant, major—Phosphorus, total [as P]monthly average 43 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20279.5 lb/d (6 values)0.221×
South Huron Valley Utility AuthorityMI0043800MISewage plant, major—Phosphorus, total [as P]monthly average 160 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 202733.5 lb/d (6 values)0.209×
City of RockwoodMI0021181MISewage plant, major—Phosphorus, total [as P]monthly average 6.7 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20271.1 lb/d (6 values)0.164×
Michigan Milk Producers AssociationMI0001414MIIndustrial—Phosphorus, total [as P]monthly average 3.3 lb/d, tighterMar 1, 20283.01 lb/d (10 values)0.912×
City of AdrianMI0022152MISewage plant, major—Phosphorus, total [as P]monthly average 47 lb/qtr (Jan, Feb, Mar, Oct, Nov, Dec), tighterOct 1, 202823 lb/qtr (6 values)0.489×
Village of Dundee WWTPMI0020401MISewage plant, major—Phosphorus, total [as P]monthly average 0.8 mg/L (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20290.55 mg/L (6 values)0.688×
Village of Dundee WWTPMI0020401MISewage plant, major—Phosphorus, total [as P]monthly average 10 lb/d (Jan, Feb, Mar, Oct, Nov, Dec), tighterSep 1, 20293.1 lb/d (6 values)0.31×

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=MI&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