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Plants facing new discharge limits — by state and pollutant

In Ohio, for Toxicity [acute], Ceriodaphnia dubia: 12 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Jan 1, 2031 (19 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 · OH 12 · IN 8 · MO 1 · NE 1

By pollutant: all · Nitrogen, ammonia total [as N] 40 · Solids, total suspended 23 · BOD, carbonaceous [5 day, 20 C] 20 · Mercury, total low level 19 · E. coli, MTEC-MF 18 · Copper, total recoverable 17 · Cyanide, free available 17 · Chlorine, total residual 16 · pH 15 · Phosphorus, total [as P] 12 · Toxicity [acute], Ceriodaphnia dubia 12 · Solids, total dissolved- 180 deg. C 11 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 11 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 10 · Zinc, total recoverable 10 · Toxicity [chronic], Ceriodaphnia dubia 9 · Selenium, total recoverable 8 · Chromium, hexavalent dissolved [as Cr] 7 · Cadmium, total recoverable 6 · Di[2-ethylhexyl] phthalate [DEHP] 6 · Lead, total recoverable 6 · Silver total recoverable 4 · Carcinogen additivity factor 2 · Nitrogen, inorganic total 2 · Oil and grease, hexane extr method 2

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
Perrysburg, City ofOH0021008OHSewage plant, major8 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Jun, Oct), newJan 1, 2027under 3 values—
Ohio Valley Coal CoOH0012661OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newMay 1, 2027under 3 values—
Ohio Valley Coal CoOH0012661OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newMay 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Aug, Dec), newAug 1, 2027under 3 values—
Church and Dwight Co IncOH0058882OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Sep), newAug 1, 2027under 3 values—
Republic Steel - Lorain PlantOH0001562OHIndustrial, major—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Sep, Dec), newAug 1, 2027under 3 values—
City of Johnstown WWTPOH0020508OHSewage plant1.2 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Jun, Aug), newSep 1, 2027under 3 values—
Boardman WWTPOH0037249OHSewage plant, major5 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Jun, Sep, Dec), newDec 1, 2027under 3 values—
city of SunburyOH0055093OHSewage plant2 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Mar, Sep), newJan 1, 2028under 3 values—
American II Wastewater Treatment PlantOH0037338OHSewage plant, major1.2 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Apr, Oct), newAug 1, 2028under 3 values—
Morton Salt, Inc.OH0000515OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Sep), newMar 1, 2029under 3 values—
Bedford Wastewater Treatment PlantOH0024040OHSewage plant, major3.2 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Jun, Dec), newMay 1, 2029under 3 values—
Austin Powder CompanyOH0006173OHIndustrial—Toxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute (Jun, Dec), newJan 1, 2031under 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