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Sewage treatment plant, Grafton, Ohio. NPDES permit OH0026140, in force until Apr 30, 2029. Last 12 months: over a limit 2 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Solids, total suspended, weekly maximum | 14.2 | ≤ 13.7 kg/d | 4% |
| May 2026 | Solids, total suspended, weekly maximum | 15 | ≤ 13.7 kg/d | 9% |
| 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 | ≥ 6 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 18 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 9.09 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 13.7 kg/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 2.3 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 8.4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.14 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.24 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.75 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 6.36 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 | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total recoverable | monthly average | ≤ 120 ug/L | Jun, Dec | 001 |
| Nickel, total recoverable | daily maximum | ≤ 1100 ug/L | Jun, Dec | 001 |
| Nickel, total recoverable | monthly average | ≤ .0909 kg/d | Jun, Dec | 001 |
| Nickel, total recoverable | daily maximum | ≤ .833 kg/d | Jun, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Chromium, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Copper, total recoverable | monthly average | ≤ 22 ug/L | Jun, Dec | 001 |
| Copper, total recoverable | daily maximum | ≤ 36 ug/L | Jun, Dec | 001 |
| Copper, total recoverable | monthly average | ≤ .0167 kg/d | Jun, Dec | 001 |
| Copper, total recoverable | daily maximum | ≤ .0273 kg/d | Jun, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | Jun, Dec | 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 |
| Mercury, total low level | monthly average | report only (ng/L) | Jun, Dec | 001 |
| Mercury, total low level | daily maximum | report only (ng/L) | Jun, Dec | 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 | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 7.57 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 11.4 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 |
| Sludge waste from secondary clarifiers | monthly average | report only (gal) | Dec | 588 |
| Sludge waste from secondary clarifiers | daily maximum | report only (gal) | 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 |
| 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 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 602 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 602 |
| Bypass valve | monthly average | report only (occur/mo) | all year | 602 |
| Bypass valve | daily maximum | report only (occur/mo) | all year | 602 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 602 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 602 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Mar, Jun, Sep, Dec | 801 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Sep, Dec | 801 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 801 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 801 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 801 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | Jun–Aug | 801 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | Jun–Aug | 801 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Mar, Jun, Sep, Dec | 901 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Sep, Dec | 901 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 901 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 901 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 901 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | Jun–Aug | 901 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | Jun–Aug | 901 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Chromium, hexavalent dissolved [as Cr], daily maximum | 16 ug/L (Jun, Dec) | new | — | — |
| Chromium, hexavalent dissolved [as Cr], daily maximum | 0.012 kg/d (Jun, Dec) | new | — | — |
| Chromium, hexavalent dissolved [as Cr], monthly average | 11 ug/L (Jun, Dec) | new | — | — |
| Chromium, hexavalent dissolved [as Cr], monthly average | 0.083 kg/d (Jun, Dec) | new | — | — |
| Copper, total recoverable, daily maximum | 0.023 kg/d (Jun, Dec) | tighter | — | — |
| Copper, total recoverable, daily maximum | 30 ug/L (Jun, Dec) | tighter | — | — |
| Copper, total recoverable, monthly average | 0.014 kg/d (Jun, Dec) | tighter | — | — |
| Copper, total recoverable, monthly average | 19 ug/L (Jun, Dec) | tighter | — | — |
| Mercury, total low level, daily maximum | 0.00129 kg/d (Jun, Dec) | new | — | — |
| Mercury, total low level, daily maximum | 1700 ng/L (Jun, Dec) | new | — | — |
| Mercury, total low level, monthly average | 1.3 ng/L (Jun, Dec) | new | — | — |
| Mercury, total low level, monthly average | 0.000001 kg/d (Jun, Dec) | new | — | — |
| Nitrogen, ammonia total [as N], monthly average | 1.06 kg/d (May–Oct) | tighter | 0.049 kg/d (6 values) | 0.0462× |
| Nitrogen, ammonia total [as N], monthly average | 1.4 mg/L (May–Oct) | tighter | 0.1075 mg/L (6 values) | 0.0768× |
| Nitrogen, ammonia total [as N], monthly average | 3.7 mg/L (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.105 mg/L (6 values) | 0.0284× |
| Nitrogen, ammonia total [as N], monthly average | 2.8 kg/d (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.042 kg/d (6 values) | 0.015× |
| Nitrogen, ammonia total [as N], weekly maximum | 1.59 kg/d (May–Oct) | tighter | 0.064 kg/d (6 values) | 0.0403× |
| Nitrogen, ammonia total [as N], weekly maximum | 2.1 mg/L (May–Oct) | tighter | 0.13 mg/L (6 values) | 0.0619× |
| Nitrogen, ammonia total [as N], weekly maximum | 5.6 mg/L (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.125 mg/L (6 values) | 0.0223× |
| Nitrogen, ammonia total [as N], weekly maximum | 4.24 kg/d (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.066 kg/d (6 values) | 0.0156× |
| Zinc, total recoverable, daily maximum | 0.18 kg/d (Jun, Dec) | new | — | — |
| Zinc, total recoverable, daily maximum | 240 ug/L (Jun, Dec) | new | — | — |
| Zinc, total recoverable, monthly average | 240 ug/L (Jun, Dec) | new | — | — |
| Zinc, total recoverable, monthly average | 0.18 kg/d (Jun, Dec) | new | — | — |
Cited limits by parameter: Ohio's rules and the federal ones.
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