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Plants facing new discharge limits — by state and pollutant

for Fluoride, total [as F]: 4 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Apr 1, 2027 and Nov 1, 2028 (9 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: IN 1 · NM 1 · OH 1 · WV 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
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Fluoride, total [as F]monthly average 2.2 mg/L, newApr 1, 20272.1 mg/L (11 values)0.955×
TimkenSteel Corp. - Canton WWTPOH0004219OHIndustrial, major—Fluoride, total [as F]monthly average 29.1 kg/d, newApr 1, 2027under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]monthly average 1.9 mg/L, newJun 1, 20280.91 mg/L (11 values)0.479×
CLARKSBURG SANITARY BDWV0023302WVSewage plant, major8 MGDFluoride, total [as F]monthly average 1.4 mg/L, newJun 1, 20280.48 mg/L (11 values)0.343×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]daily maximum 3.3 mg/L, newJun 1, 20281.09 mg/L (11 values)0.33×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]monthly average 1.9 mg/L, newJun 1, 20280.47 mg/L (11 values)0.247×
CLARKSBURG SANITARY BDWV0023302WVSewage plant, major8 MGDFluoride, total [as F]daily maximum 2.6 mg/L, newJun 1, 20280.48 mg/L (11 values)0.185×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]daily maximum 3.3 mg/L, newJun 1, 20280.49 mg/L (11 values)0.148×
GALLUP, CITY OFNM0020672NMIndustrial, major3.5 MGDFluoride, total [as F]30-day average 1512 ug/L, tighterNov 1, 2028930 ug/L (6 values)0.615×

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