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Plants facing new discharge limits — by state and pollutant

In California: 5 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Oct 13, 2027 (25 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 · 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

By pollutant: Diazinon + Chlorpyrifos 3 · Mercury, total recoverable 3 · Acute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr P promelas 1 · Aluminum, total recoverable 1 · Copper, total recoverable 1 · Iron, total recoverable 1 · Manganese, total recoverable 1 · Nickel, total recoverable 1 · pH 1 · Zinc, total recoverable 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
State of California Department of Parks and RecreationCA0085332CAIndustrial—Manganese, total recoverablemonthly average 72 ug/L, tighterOct 13, 20271105 ug/L (4 values)15.3×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Manganese, total recoverabledaily maximum 130 ug/L, tighterOct 13, 20271104 ug/L (4 values)8.5×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Aluminum, total recoverablemonthly average 94 ug/L, tighterOct 13, 2027355 ug/L (9 values)3.78×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Iron, total recoverablemonthly average 710 ug/L, tighterOct 13, 20272000 ug/L (9 values)2.82×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Nickel, total recoverablemonthly average 14 ug/L, tighterOct 13, 202738 ug/L (6 values)2.71×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Copper, total recoverablemonthly average 1.3 ug/L, tighterOct 13, 20272.5 ug/L (6 values)1.92×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Nickel, total recoverabledaily maximum 26 ug/L, tighterOct 13, 202738 ug/L (6 values)1.46×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Aluminum, total recoverabledaily maximum 290 ug/L, tighterOct 13, 2027355 ug/L (9 values)1.22×
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDAcute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr P promelasdaily maximum 50 % effect, newJan 1, 2027under 3 values—
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDAcute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr P promelasdaily maximum 0 pass=0;fail=1, newJan 1, 2027under 3 values—
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDAcute Mthd Survival Endpt, %Effect, Median TSTaHo R/nR Pass/Fail, StatR96hr P promelasmonthly median 0 pass=0;fail=1, newJan 1, 2027under 3 values—
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDDiazinon + Chlorpyrifosmonthly average 1 ug/L, newJan 1, 2027under 3 values—
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDDiazinon + Chlorpyrifosweekly average 1 ug/L, newJan 1, 2027under 3 values—
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDMercury, total recoverableannual total 0.18 lb/yr, newJan 1, 2027under 3 values—
Manteca, City ofCA0081558CASewage plant, major9.87 MGDDiazinon + Chlorpyrifosmonthly average 1 ug/L, newJan 1, 2027under 3 values—
Manteca, City ofCA0081558CASewage plant, major9.87 MGDDiazinon + Chlorpyrifosweekly average 1 ug/L, newJan 1, 2027under 3 values—
Regents, University of CaliforniaCA0077895CASewage plant, major3.6 MGDMercury, total recoverableannual total 0.015 lb/yr, newJan 1, 2027under 3 values—
Sacramento Regional County Sanitation DistrictCA0077682CASewage plant, major181 MGDDiazinon + Chlorpyrifosmonthly average 1 ug/L, newJan 1, 2027under 3 values—
Sacramento Regional County Sanitation DistrictCA0077682CASewage plant, major181 MGDDiazinon + Chlorpyrifosweekly average 1 ug/L, newJan 1, 2027under 3 values—
Sacramento Regional County Sanitation DistrictCA0077682CASewage plant, major181 MGDMercury, total recoverableannual total 1043 g/yr, newJan 1, 2027under 3 values—
State of California Department of Parks and RecreationCA0085332CAIndustrial—Iron, total recoverabledaily maximum 2000 ug/L, tighterOct 13, 20272000 ug/L (9 values)1×
State of California Department of Parks and RecreationCA0085332CAIndustrial—pHmaximum 8.5 SU, tighterOct 13, 20277.48 SU (7 values)0.88×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Copper, total recoverabledaily maximum 3.9 ug/L, tighterOct 13, 20272.5 ug/L (6 values)0.641×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Zinc, total recoverablemonthly average 18 ug/L, tighterOct 13, 20277.8 ug/L (4 values)0.433×
State of California Department of Parks and RecreationCA0085332CAIndustrial—Zinc, total recoverabledaily maximum 38 ug/L, tighterOct 13, 20277.8 ug/L (4 values)0.205×

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=CA&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