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for Toxicity [acute], Pimephales promelas [Fathead Minnow]: 21 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Jan 1, 2027 and Oct 1, 2032 (28 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: OH 11 · IN 8 · MO 1 · NE 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
| Plant | Permit | State | Type | Design flow | Parameter | New limit | Effective | Today's median | × limit |
|---|---|---|---|---|---|---|---|---|---|
| AMERICAN ELECTRIC POWER, ROCKPORT PLANT | IN0051845 | IN | Industrial, major | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Jan–Mar), new | Jan 1, 2027 | under 3 values | — |
| Bluffton WWTP | OH0020851 | OH | Sewage plant, major | 1.9 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (May, Nov), new | Feb 1, 2027 | under 3 values | — |
| PAOLI MUNICIPAL WWTP | IN0024023 | IN | Sewage plant, major | .8 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Aug), new | Mar 1, 2027 | under 3 values | — |
| AMERICAN ELECTRIC POWER, ROCKPORT PLANT | IN0051845 | IN | Industrial, major | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Mar, Sep), new | Apr 1, 2027 | under 3 values | — |
| PAOLI MUNICIPAL WWTP | IN0024023 | IN | Sewage plant, major | .8 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Sep), new | Apr 1, 2027 | under 3 values | — |
| AMERICAN ELECTRIC POWER, ROCKPORT PLANT | IN0051845 | IN | Industrial, major | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Apr, Oct), new | May 1, 2027 | under 3 values | — |
| Church and Dwight Co Inc | OH0058882 | OH | Industrial | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Sep), new | Aug 1, 2027 | under 3 values | — |
| Republic Steel - Lorain Plant | OH0001562 | OH | Industrial, major | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Mar, Jun, Sep, Dec), new | Aug 1, 2027 | under 3 values | — |
| North Royalton WWTP 'B' | OH0026808 | OH | Sewage plant | 1 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Jun, Aug), new | Nov 1, 2027 | under 3 values | — |
| Boardman WWTP | OH0037249 | OH | Sewage plant, major | 5 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Mar, Jun, Sep, Dec), new | Dec 1, 2027 | under 3 values | — |
| City of Mansfield WWTP | OH0026328 | OH | Sewage plant, major | 24 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Feb, May, Aug, Nov), new | Apr 1, 2028 | under 3 values | — |
| Detrex Corporation, Chemicals Division | OH0001872 | OH | Industrial, major | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Jun, Sep), new | Jun 1, 2028 | under 3 values | — |
| NEORSD Southerly Wastewater Treatment Center | OH0024651 | OH | Sewage plant, major | 175 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Mar, Jun, Sep, Dec), new | Jul 1, 2028 | under 3 values | — |
| NEORSD Westerly Wastewater Treatment Center | OH0024660 | OH | Sewage plant, major | 35 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (May, Nov), new | Jul 1, 2028 | under 3 values | — |
| North Olmsted WWTP | OH0026778 | OH | Sewage plant, major | 7 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Jun, Sep), new | Aug 1, 2028 | under 3 values | — |
| HENDRICKS COUNTY RSD | IN0057614 | IN | Sewage plant, major | 3 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute, new | Sep 1, 2028 | under 3 values | — |
| Vicinity Energy Kansas City, Inc. | MO0004847 | MO | Industrial, major | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1.2 toxic, new | Nov 1, 2028 | under 3 values | — |
| Morton Salt, Inc. | OH0000515 | OH | Industrial | — | Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum 1 tox acute (Sep), new | Mar 1, 2029 | under 3 values | — |
| BROWNSBURG WWTP | IN0021245 | IN | Sewage plant, major | 5.25 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox chronic (Mar), new | Oct 1, 2029 | under 3 values | — |
| BROWNSBURG WWTP | IN0021245 | IN | Sewage plant, major | 5.25 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Apr), new | Nov 1, 2029 | under 3 values | — |
| FLORA MUNICIPAL WWTP | IN0020141 | IN | Sewage plant | .428 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (May), new | Dec 1, 2029 | under 3 values | — |
| LOWELL WASTEWATER TREATMENT PLANT | IN0023621 | IN | Sewage plant, major | 4 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Jun), new | Jan 1, 2030 | under 3 values | — |
| WINFIELD WWTP | IN0058343 | IN | Sewage plant, major | 1.6 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Jun), new | Jan 1, 2030 | under 3 values | — |
| LOWELL WASTEWATER TREATMENT PLANT | IN0023621 | IN | Sewage plant, major | 4 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Jul), new | Feb 1, 2030 | under 3 values | — |
| ROCKPORT NORTH WWTP | IN0061662 | IN | Sewage plant | .3 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 1 tox acute (Sep), new | Apr 1, 2030 | under 3 values | — |
| OMAHA PAPILLION CREEK WWTF | NE0112810 | NE | Sewage plant, major | 55 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 2.86 tox acute (Jun–Oct), tighter | Oct 1, 2032 | under 3 values | — |
| OMAHA PAPILLION CREEK WWTF | NE0112810 | NE | Sewage plant, major | 55 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 2.57 tox acute (Jan, Feb, Nov, Dec), tighter | Oct 1, 2032 | under 3 values | — |
| OMAHA PAPILLION CREEK WWTF | NE0112810 | NE | Sewage plant, major | 55 MGD | Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum 2.14 tox acute (Mar–May), tighter | Oct 1, 2032 | under 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