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Plants facing new discharge limits — by state and pollutant

for Mercury, total recoverable: 7 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Apr 1, 2029 (14 limits); 2 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: CA 3 · AR 2 · IN 1 · NJ 1

By pollutant: all · Nitrogen, ammonia total [as N] 526 · Chlorine, total residual 272 · Phosphorus, total [as P] 106 · E. coli 103 · Copper, total [as Cu] 85 · Copper, total recoverable 63 · Solids, total suspended 60 · Chloride [as Cl] 56 · BOD, carbonaceous [5 day, 20 C] 48 · Zinc, total [as Zn] 39 · Zinc, total recoverable 36 · BOD, 5-day, 20 deg. C 35 · pH 31 · Cyanide, free available 30 · Nitrogen, total [as N] 28 · Iron, total [as Fe] 22 · Mercury, total [as Hg] 22 · Toxicity [acute], Ceriodaphnia dubia 22 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 21 · Selenium, total [as Se] 20 · Di[2-ethylhexyl] phthalate [DEHP] 19 · E. coli, MTEC-MF 19 · Mercury, total low level 19 · Toxicity [chronic], Ceriodaphnia dubia 18 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 18

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
Lanxess Corporation - Central PlantAR0001171ARIndustrial, major—Mercury, total recoverablemonthly average 0.0134 ug/L, newJul 1, 20270.016 ug/L (11 values)1.19×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Mercury, total recoverabledaily maximum 23 ng/L (Feb, Jun, Oct), tighterJan 1, 2029160 ng/L (3 values)6.96×
Lincoln Center Environmental Remediation TrustCA0084255CAIndustrial.25 MGDMercury, total recoverableannual total 0.18 lb/yr, 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 MGDMercury, total recoverableannual total 1043 g/yr, newJan 1, 2027under 3 values—
Lanxess Corporation - Central PlantAR0001171ARIndustrial, major—Mercury, total recoverabledaily maximum 0.0269 ug/L, newJul 1, 20270.016 ug/L (11 values)0.595×
Lanxess Corporation - Central PlantAR0001171ARIndustrial, major—Mercury, total recoverabledaily maximum 0.0269 ug/L, newJul 1, 20270.0099 ug/L (9 values)0.368×
Lanxess Corporation - Central PlantAR0001171ARIndustrial, major—Mercury, total recoverablemonthly average 0.0134 ug/L, newJul 1, 2027under 3 values—
LANXESS Corporation - West PlantAR0043516ARIndustrial—Mercury, total recoverabledaily maximum 0.0269 ug/L, newJul 1, 20270.005 ug/L (11 values, 9 below detection)—
LANXESS Corporation - West PlantAR0043516ARIndustrial—Mercury, total recoverablemonthly average 0.0134 ug/L, newJul 1, 20270.005 ug/L (11 values, 9 below detection)—
VILLAGE OF RIDGEWOODNJ0024791NJSewage plant, major5 MGDMercury, total recoverabledaily maximum 3.05 g/d, newApr 1, 20290.223 g/d (6 values, 6 below detection)—
VILLAGE OF RIDGEWOODNJ0024791NJSewage plant, major5 MGDMercury, total recoverabledaily maximum 0.16 ug/L, newApr 1, 20290.0251 ug/L (6 values, 6 below detection)—
VILLAGE OF RIDGEWOODNJ0024791NJSewage plant, major5 MGDMercury, total recoverablemonthly average 0.09 ug/L, newApr 1, 20290.0251 ug/L (6 values, 6 below detection)—
VILLAGE OF RIDGEWOODNJ0024791NJSewage plant, major5 MGDMercury, total recoverablemonthly average 1.71 g/d, newApr 1, 20290.223 g/d (6 values, 6 below detection)—

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