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Plants facing new discharge limits — by state and pollutant

In Ohio, for Solids, total dissolved- 180 deg. C: 11 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Dec 1, 2026 and Sep 1, 2029 (30 limits); 5 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 11

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
New Bremen, Village ofOH0020346OHSewage plant.9 MGDSolids, total dissolved- 180 deg. Cmonthly average 1501 mg/L, newDec 1, 20261760 mg/L (11 values)1.17×
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 1684 mg/L, newMar 1, 20271898 mg/L (6 values)1.13×
Ohio Valley Coal CoOH0012661OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newMay 1, 20272295 mg/L (6 values)1.53×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20273480 mg/L (11 values)2.32×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 2232 mg/L, newAug 1, 20275020 mg/L (11 values)2.25×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20272730 mg/L (7 values)1.82×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20272210 mg/L (3 values)1.47×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newAug 1, 20272055 mg/L (6 values)1.37×
Plain City, Village ofOH0027057OHSewage plant1.25 MGDSolids, total dissolved- 180 deg. Cmonthly average 891 mg/L, newSep 1, 20271670 mg/L (11 values)1.87×
New Bremen, Village ofOH0020346OHSewage plant.9 MGDSolids, total dissolved- 180 deg. Cmonthly average 5120 kg/d, newDec 1, 2026under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 1635 mg/L, newMar 1, 20271641 mg/L (4 values)1×
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 1725 mg/L, newMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 11800 kg/d, newMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 14000 kg/d, newMar 1, 2027under 3 values—
Fairfield Co UtilitiesOH0054305OHSewage plant, major—Solids, total dissolved- 180 deg. Cmonthly average 18600 kg/d, newMar 1, 2027under 3 values—
Mt Hope WWTPOH0092282OHSewage plant.1 MGDSolids, total dissolved- 180 deg. Cmonthly average 1577 mg/L (Jan, Mar, May, Jul, Sep, Nov), newApr 1, 20271300 mg/L (5 values)0.824×
Mt Hope WWTPOH0092282OHSewage plant.1 MGDSolids, total dissolved- 180 deg. Cmonthly average 600 kg/d (Jan, Mar, May, Jul, Sep, Nov), newApr 1, 2027under 3 values—
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1720 mg/L, newAug 1, 2027604 mg/L (10 values)0.351×
American Energy CorpOH0059552OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1720 mg/L, newAug 1, 2027under 3 values—
Plain City, Village ofOH0027057OHSewage plant1.25 MGDSolids, total dissolved- 180 deg. Cmonthly average 4215 kg/d, newSep 1, 2027under 3 values—
WTPS - River Transportation TerminalOH0105716OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 57000 mg/L, newNov 1, 202747200 mg/L (8 values)0.828×
WTPS - River Transportation TerminalOH0105716OHIndustrial—Solids, total dissolved- 180 deg. Cdaily maximum 70000 mg/L, newNov 1, 202747200 mg/L (8 values)0.674×
Insource Technologies, IncOH0149560OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 2939 mg/L, newJan 1, 2028under 3 values—
Insource Technologies, IncOH0149560OHIndustrial—Solids, total dissolved- 180 deg. Cweekly maximum 4409 mg/L, newJan 1, 2028under 3 values—
Cadiz PortalOH0011835OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 2254 mg/L, newJun 1, 2028under 3 values—
Cadiz PortalOH0011835OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 2254 mg/L, newJun 1, 2028under 3 values—
Cadiz PortalOH0011835OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newJun 1, 2028under 3 values—
Morton Salt, Inc.OH0000515OHIndustrial—Solids, total dissolved- 180 deg. Cmonthly average 16745 mg/L, newMar 1, 2029335 mg/L (10 values)0.02×
Opalocka WWTPOH0028843OHSewage plant.16 MGDSolids, total dissolved- 180 deg. Cmonthly average 1500 mg/L, newSep 1, 20291406 mg/L (11 values)0.937×
Opalocka WWTPOH0028843OHSewage plant.16 MGDSolids, total dissolved- 180 deg. Cmonthly average 908 kg/d, newSep 1, 2029under 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