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Plants facing new discharge limits — by state and pollutant

for Arsenic, total [as As]: 8 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Dec 1, 2026 and Jul 1, 2030 (20 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: PA 6 · IA 1 · MI 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
GLOBAL ADVANCED METALS USA INCPA0011266PAIndustrial.248 MGDArsenic, total [as As]monthly average 0.109 mg/L, newMar 1, 20270.1335 mg/L (8 values)1.22×
GLOBAL ADVANCED METALS USA INCPA0011266PAIndustrial.248 MGDArsenic, total [as As]monthly average 0.16 lb/d, newMar 1, 20270.1705 lb/d (8 values)1.07×
LBR ACQUISITION CO LLCPA0027481PAIndustrial, major3.715 MGDArsenic, total [as As]daily maximum 0.016 mg/L, newMar 1, 20280.098 mg/L (3 values)6.12×
LBR ACQUISITION CO LLCPA0027481PAIndustrial, major3.715 MGDArsenic, total [as As]quarterly average 0.01 mg/L, newMar 1, 20280.0554 mg/L (3 values)5.54×
HOMER CITY GENERATION LPPA0005037PAIndustrial, major20.541 MGDArsenic, total [as As]daily maximum 0.005 mg/L, newDec 1, 2026under 3 values—
GLOBAL ADVANCED METALS USA INCPA0011266PAIndustrial.248 MGDArsenic, total [as As]daily maximum 0.17 mg/L, newMar 1, 20270.14 mg/L (8 values)0.824×
GLOBAL ADVANCED METALS USA INCPA0011266PAIndustrial.248 MGDArsenic, total [as As]daily maximum 0.25 lb/d, newMar 1, 20270.1805 lb/d (8 values)0.722×
REPUBLIC SVC OF PA LLCPA0046680PAIndustrial.5 MGDArsenic, total [as As]daily maximum 0.042 mg/L, newJul 1, 20270.001 mg/L (9 values, 6 below detection)—
REPUBLIC SVC OF PA LLCPA0046680PAIndustrial.5 MGDArsenic, total [as As]daily maximum 0.18 lb/d, newJul 1, 2027under 3 values—
REPUBLIC SVC OF PA LLCPA0046680PAIndustrial.5 MGDArsenic, total [as As]monthly average 0.027 mg/L, newJul 1, 20270.001 mg/L (9 values, 6 below detection)—
REPUBLIC SVC OF PA LLCPA0046680PAIndustrial.5 MGDArsenic, total [as As]monthly average 0.11 lb/d, newJul 1, 2027under 3 values—
Pfizer IncorporatedMI0002941MIIndustrial, major—Arsenic, total [as As]monthly average 10 ug/L, newSep 1, 20278.6 ug/L (11 values)0.86×
Pfizer IncorporatedMI0002941MIIndustrial, major—Arsenic, total [as As]monthly average 2.5 lb/d, newSep 1, 20270.73 lb/d (11 values)0.292×
MUSCATINE POWER AND WATERIA0001082IAIndustrial, major—Arsenic, total [as As]daily maximum 0.005 mg/L, newJan 1, 2029under 3 values—
WOODGRAIN INCPA0209457PAIndustrial.06 MGDArsenic, total [as As]daily maximum 0.01 lb/d, newAug 1, 20290.0013 lb/d (9 values)0.13×
WOODGRAIN INCPA0209457PAIndustrial.06 MGDArsenic, total [as As]monthly average 29.2 ug/L, newAug 1, 20293.5 ug/L (9 values)0.12×
WOODGRAIN INCPA0209457PAIndustrial.06 MGDArsenic, total [as As]monthly average 0.006 lb/d, newAug 1, 20290.0007 lb/d (9 values)0.117×
WOODGRAIN INCPA0209457PAIndustrial.06 MGDArsenic, total [as As]daily maximum 45.5 ug/L, newAug 1, 20293.9 ug/L (9 values)0.0857×
MONTOUR LLCPA0008443PAIndustrial, major2.76 MGDArsenic, total [as As]daily maximum 11 ug/L, newJul 1, 2030under 3 values—
MONTOUR LLCPA0008443PAIndustrial, major2.76 MGDArsenic, total [as As]quarterly average 8 ug/L, newJul 1, 2030under 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