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Plants facing new discharge limits — by state and pollutant

for Silver, total [as Ag]: 4 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jul 1, 2027 and Jul 1, 2028 (14 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: PA 2 · CT 1 · IA 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
SUMMIT CORPORATION OF AMERICACT0001180CTIndustrial, major—Silver, total [as Ag]monthly average 11 ug/L, tighterJul 1, 202715 ug/L (11 values)1.36×
SUMMIT CORPORATION OF AMERICACT0001180CTIndustrial, major—Silver, total [as Ag]monthly average 7.1 g/d, tighterJul 1, 20276.106 g/d (11 values)0.86×
SUMMIT CORPORATION OF AMERICACT0001180CTIndustrial, major—Silver, total [as Ag]daily maximum 31 ug/L, tighterJul 1, 202721 ug/L (11 values)0.677×
SUMMIT CORPORATION OF AMERICACT0001180CTIndustrial, major—Silver, total [as Ag]daily maximum 19 g/d, tighterJul 1, 20278.62 g/d (11 values)0.454×
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDSilver, total [as Ag]daily maximum 0.56 ug/L, newSep 1, 20270.1 ug/L (3 values, 3 below detection)—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDSilver, total [as Ag]monthly average 0.52 ug/L, newSep 1, 20270.1 ug/L (3 values, 3 below detection)—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDSilver, total [as Ag]daily maximum 0.52 ug/L, newSep 1, 2027under 3 values—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDSilver, total [as Ag]monthly average 0.49 ug/L, newSep 1, 2027under 3 values—
CONEMAUGH TWP SOMERSET CNTYPA0216399PAIndustrial.643 MGDSilver, total [as Ag]daily maximum 0.4 ug/L, newJan 1, 2028under 3 values—
CONEMAUGH TWP SOMERSET CNTYPA0216399PAIndustrial.643 MGDSilver, total [as Ag]monthly average 0.4 ug/L, newJan 1, 2028under 3 values—
KINZE MANUFACTURING, INC.IA0076881IAIndustrial—Silver, total [as Ag]30-day average 0.01187 lb/d, newJul 1, 2028under 3 values—
KINZE MANUFACTURING, INC.IA0076881IAIndustrial—Silver, total [as Ag]30-day average 0.01265 mg/L, newJul 1, 2028under 3 values—
KINZE MANUFACTURING, INC.IA0076881IAIndustrial—Silver, total [as Ag]daily maximum 0.01187 lb/d, newJul 1, 2028under 3 values—
KINZE MANUFACTURING, INC.IA0076881IAIndustrial—Silver, total [as Ag]daily maximum 0.01265 mg/L, newJul 1, 2028under 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=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