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Plants facing new discharge limits — by state and pollutant

In Pennsylvania, for Cadmium, total [as Cd]: 4 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Sep 1, 2027 and Oct 1, 2028 (18 limits); 0 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 · PA 4 · LA 2 · SC 2 · IA 1 · NY 1 · OK 1

By pollutant: all · Chlorine, total residual 70 · Copper, total [as Cu] 48 · Nitrogen, ammonia total [as N] 45 · Cyanide, free available 13 · Zinc, total [as Zn] 12 · Aluminum, total [as Al] 11 · Selenium, total [as Se] 10 · Chloroform 9 · Di[2-ethylhexyl] phthalate [DEHP] 9 · Thallium, total [as Tl] 9 · Temperature, water deg. fahrenheit 8 · BOD, carbonaceous [5 day, 20 C] 7 · Dichlorobromomethane 7 · Iron, total [as Fe] 7 · Lead, total [as Pb] 7 · Manganese, total [as Mn] 7 · Solids, total suspended 7 · Arsenic, total [as As] 6 · Mercury, total [as Hg] 6 · Boron, total [as B] 5 · Cadmium, total [as Cd] 4 · Chlorodibromomethane 4 · Iron, dissolved [as Fe] 4 · Phosphorus, total [as P] 4 · Antimony, total [as Sb] 3

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]daily maximum 0.22 ug/L, newSep 1, 2027under 3 values—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]monthly average 0.2 ug/L, newSep 1, 2027under 3 values—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]daily maximum 0.23 ug/L, newSep 1, 2027under 3 values—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]monthly average 0.2 ug/L, newSep 1, 2027under 3 values—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]daily maximum 0.2 ug/L, newSep 1, 20270.15 ug/L (3 values, 3 below detection)—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]monthly average 0.2 ug/L, newSep 1, 20270.15 ug/L (3 values, 3 below detection)—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]daily maximum 0.2 ug/L, newSep 1, 2027under 3 values—
CURTISS WRIGHT CORPPA0001228PAIndustrial.55 MGDCadmium, total [as Cd]monthly average 0.2 ug/L, newSep 1, 2027under 3 values—
CONEMAUGH TWP SOMERSET CNTYPA0216399PAIndustrial.643 MGDCadmium, total [as Cd]daily maximum 1.11 ug/L, newJan 1, 2028under 3 values—
CONEMAUGH TWP SOMERSET CNTYPA0216399PAIndustrial.643 MGDCadmium, total [as Cd]monthly average 0.71 ug/L, newJan 1, 2028under 3 values—
CONEMAUGH TWP SOMERSET CNTYPA0216399PAIndustrial.643 MGDCadmium, total [as Cd]daily maximum 2.36 ug/L, newJan 1, 2028under 3 values—
CONEMAUGH TWP SOMERSET CNTYPA0216399PAIndustrial.643 MGDCadmium, total [as Cd]monthly average 1.51 ug/L, newJan 1, 2028under 3 values—
MARY D COMM ASSNPA0062855PAIndustrial.002 MGDCadmium, total [as Cd]monthly average 0.0003 mg/L, newSep 1, 20280.0002 mg/L (10 values, 4 below detection)0.667×
MARY D COMM ASSNPA0062855PAIndustrial.002 MGDCadmium, total [as Cd]monthly average 0.000004 lb/d, newSep 1, 20280.000002495 lb/d (10 values, 2 below detection)0.624×
MARY D COMM ASSNPA0062855PAIndustrial.002 MGDCadmium, total [as Cd]daily maximum 0.000007 lb/d, newSep 1, 20280.000004006 lb/d (10 values, 1 below detection)0.572×
MARY D COMM ASSNPA0062855PAIndustrial.002 MGDCadmium, total [as Cd]daily maximum 0.0004 mg/L, newSep 1, 20280.0002 mg/L (10 values, 4 below detection)0.5×
PA AMER WATER COPA0026492PAIndustrial, major20 MGDCadmium, total [as Cd]daily maximum 0.85 ug/L, newOct 1, 20280.4 ug/L (9 values, 9 below detection)—
PA AMER WATER COPA0026492PAIndustrial, major20 MGDCadmium, total [as Cd]monthly average 0.55 ug/L, newOct 1, 20280.4 ug/L (9 values, 9 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=PA&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