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Sewage treatment plant, major discharger, Mentor, Ohio. NPDES permit OH0043559, in force until Mar 31, 2027. Last 12 months: over a limit 13 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Phosphorus, total [as P], monthly average | 1.65 | ≤ 1 mg/L | 65% |
| October 2025 | Phosphorus, total [as P], monthly average | 119 | ≤ 75.7 kg/d | 57% |
| October 2025 | Phosphorus, total [as P], weekly maximum | 1.69 | ≤ 1.5 mg/L | 13% |
| October 2025 | Phosphorus, total [as P], weekly maximum | 140 | ≤ 114 kg/d | 23% |
| November 2025 | Phosphorus, total [as P], monthly average | 1.21 | ≤ 1 mg/L | 21% |
| November 2025 | Phosphorus, total [as P], weekly maximum | 1.65 | ≤ 1.5 mg/L | 10% |
| February 2026 | Mercury, total low level, monthly average | .000136 | ≤ .000129 kg/d | 5% |
| February 2026 | Phosphorus, total [as P], monthly average | 1.11 | ≤ 1 mg/L | 11% |
| February 2026 | Phosphorus, total [as P], weekly maximum | 1.88 | ≤ 1.5 mg/L | 25% |
| February 2026 | Phosphorus, total [as P], weekly maximum | 175 | ≤ 114 kg/d | 54% |
| June 2026 | Phosphorus, total [as P], monthly average | 1.13 | ≤ 1 mg/L | 13% |
| June 2026 | Phosphorus, total [as P], weekly maximum | 1.86 | ≤ 1.5 mg/L | 24% |
| August 2026 | Phosphorus, total [as P], weekly maximum | 1.62 | ≤ 1.5 mg/L | 8% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 18 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 27 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1370 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 2050 kg/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 13.1 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 13.6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 19.6 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 20.4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 992 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1030 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1490 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1550 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | weekly maximum | ≤ 1.5 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 75.7 kg/d | all year | 001 |
| Phosphorus, total [as P] | weekly maximum | ≤ 114 kg/d | all year | 001 |
| Phosphate, ortho, dissolved [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphate, ortho, dissolved [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Silver total recoverable | daily maximum | ≤ 4.3 ug/L | all year | 001 |
| Silver total recoverable | daily maximum | ≤ .326 kg/d | all year | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | May–Oct | 001 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 284 MPN/100mL | May–Oct | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | May–Oct | 001 |
| Mercury, total low level | monthly average | ≤ 1.7 ng/L | all year | 001 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | all year | 001 |
| Mercury, total low level | monthly average | ≤ .000129 kg/d | all year | 001 |
| Mercury, total low level | daily maximum | ≤ .129 kg/d | all year | 001 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 001 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Jun | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Jun | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | monthly average | report only (tox chronic) | Jun | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (tox chronic) | Jun | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Jun | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Jun | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox chronic) | Jun | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox chronic) | Jun | 001 |
| pH, maximum | daily maximum | ≤ 9 SU | all year | 001 |
| pH, minimum | daily minimum | ≥ 6.5 SU | all year | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 14 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 21 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1060 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 1590 kg/d | all year | 001 |
| Overflows | monthly average | report only (occur/mo) | all year | 300 |
| Overflows | daily maximum | report only (occur/mo) | all year | 300 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 586 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 586 |
| Sludge weight, dry | monthly average | report only (dry ton) | Dec | 588 |
| Sludge weight, dry | daily maximum | report only (dry ton) | Dec | 588 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 601 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 601 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 601 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 601 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Molybdenum, total [as Mo] | monthly average | report only (ug/L) | all year | 601 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 601 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 601 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 601 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 601 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 601 |
| pH, maximum | daily maximum | report only (SU) | all year | 601 |
| pH, minimum | daily minimum | report only (SU) | all year | 601 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 601 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 601 |
Cited limits by parameter: Ohio's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/OH0043559 · MCP: https://passage-data.com/mcp