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Sewage treatment plant, Danville, Ohio. NPDES permit OH0024872, in force until Oct 31, 2027. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Oxygen, dissolved [DO], daily minimum | 3.2 | ≥ 6 mg/L | 47% |
| 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 | ≤ 65 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 90 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 49.2 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 68.2 kg/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | Mar, Jun, Aug, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .78 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.2 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 5.6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .59 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.81 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .91 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 4.25 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 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 | report only (ug/L) | Jun, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | 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 | report only (ug/L) | Jun, Dec | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | 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 | ≤ 12 ng/L | Jun, Dec | 001 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | Jun, Dec | 001 |
| Mercury, total low level | monthly average | ≤ .0000091 kg/d | Jun, Dec | 001 |
| Mercury, total low level | daily maximum | ≤ .00129 kg/d | Jun, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 20 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 30 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15.1 kg/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 18.9 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 22.7 kg/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 30.3 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 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 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 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Oct | 701 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Oct | 701 |
| Conductivity | monthly average | report only (umho/cm) | Oct | 701 |
| Conductivity | daily maximum | report only (umho/cm) | Oct | 701 |
| pH | daily minimum | report only (SU) | Oct | 701 |
| pH | daily maximum | report only (SU) | Oct | 701 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Oct | 701 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 701 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Oct | 701 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Oct | 701 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Oct | 701 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Oct | 701 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Oct | 701 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Oct | 701 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Oct | 701 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Oct | 701 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Oct | 702 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Oct | 702 |
| Turbidity | monthly average | report only (NTU) | Oct | 702 |
| Turbidity | daily maximum | report only (NTU) | Oct | 702 |
| Conductivity | monthly average | report only (umho/cm) | Oct | 702 |
| Conductivity | daily maximum | report only (umho/cm) | Oct | 702 |
| pH | daily minimum | report only (SU) | Oct | 702 |
| pH | daily maximum | report only (SU) | Oct | 702 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Oct | 702 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 702 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Oct | 702 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Oct | 702 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Oct | 702 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Oct | 702 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Oct | 702 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Oct | 702 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Oct | 702 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Oct | 702 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Apr, Oct | 703 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Apr, Oct | 703 |
| Turbidity | monthly average | report only (NTU) | Apr, Oct | 703 |
| Turbidity | daily maximum | report only (NTU) | Apr, Oct | 703 |
| Conductivity | monthly average | report only (umho/cm) | Apr, Oct | 703 |
| Conductivity | daily maximum | report only (umho/cm) | Apr, Oct | 703 |
| pH | daily minimum | report only (SU) | Apr, Oct | 703 |
| pH | daily maximum | report only (SU) | Apr, Oct | 703 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Apr, Oct | 703 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr, Oct | 703 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Apr, Oct | 703 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Apr, Oct | 703 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Apr, Oct | 703 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Apr, Oct | 703 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Apr, Oct | 703 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Apr, Oct | 703 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Apr, Oct | 703 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Apr, Oct | 703 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Apr, Oct | 704 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Apr, Oct | 704 |
| Turbidity | monthly average | report only (NTU) | Apr, Oct | 704 |
| Turbidity | daily maximum | report only (NTU) | Apr, Oct | 704 |
| Conductivity | monthly average | report only (umho/cm) | Apr, Oct | 704 |
| Conductivity | daily maximum | report only (umho/cm) | Apr, Oct | 704 |
| pH | daily minimum | report only (SU) | Apr, Oct | 704 |
| pH | daily maximum | report only (SU) | Apr, Oct | 704 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Apr, Oct | 704 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr, Oct | 704 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Apr, Oct | 704 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Apr, Oct | 704 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Apr, Oct | 704 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Apr, Oct | 704 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Apr, Oct | 704 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Apr, Oct | 704 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Apr, Oct | 704 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Apr, Oct | 704 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Oct | 705 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Oct | 705 |
| Turbidity | monthly average | report only (NTU) | Oct | 705 |
| Turbidity | daily maximum | report only (NTU) | Oct | 705 |
| Conductivity | monthly average | report only (umho/cm) | Oct | 705 |
| Conductivity | daily maximum | report only (umho/cm) | Oct | 705 |
| pH | daily minimum | report only (SU) | Oct | 705 |
| pH | daily maximum | report only (SU) | Oct | 705 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Oct | 705 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 705 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Oct | 705 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Oct | 705 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Oct | 705 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Oct | 705 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Oct | 705 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Oct | 705 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Oct | 705 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Oct | 705 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Oct | 708 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Oct | 708 |
| Turbidity | monthly average | report only (NTU) | Oct | 708 |
| Turbidity | daily maximum | report only (NTU) | Oct | 708 |
| Conductivity | monthly average | report only (umho/cm) | Oct | 708 |
| Conductivity | daily maximum | report only (umho/cm) | Oct | 708 |
| pH | daily minimum | report only (SU) | Oct | 708 |
| pH | daily maximum | report only (SU) | Oct | 708 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Oct | 708 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 708 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Oct | 708 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Oct | 708 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Oct | 708 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Oct | 708 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Oct | 708 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Oct | 708 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Oct | 708 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Oct | 708 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Oct | 709 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Oct | 709 |
| Turbidity | monthly average | report only (NTU) | Oct | 709 |
| Turbidity | daily maximum | report only (NTU) | Oct | 709 |
| Conductivity | monthly average | report only (umho/cm) | Oct | 709 |
| Conductivity | daily maximum | report only (umho/cm) | Oct | 709 |
| pH | daily minimum | report only (SU) | Oct | 709 |
| pH | daily maximum | report only (SU) | Oct | 709 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Oct | 709 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 709 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Oct | 709 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Oct | 709 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Oct | 709 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Oct | 709 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Oct | 709 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Oct | 709 |
| Depth to water level ft below landsurface | monthly average | report only (ft) | Oct | 709 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | Oct | 709 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Mar, Jun, Aug, Dec | 801 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Aug, Dec | 801 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| pH | daily minimum | report only (SU) | Mar, Jun, Aug, Dec | 801 |
| pH | daily maximum | report only (SU) | Mar, Jun, Aug, Dec | 801 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Aug, 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, Aug, Dec | 901 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Aug, Dec | 901 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| pH | daily minimum | report only (SU) | Mar, Jun, Aug, Dec | 901 |
| pH | daily maximum | report only (SU) | Mar, Jun, Aug, Dec | 901 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Aug, 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 |
Cited limits by parameter: Ohio's rules and the federal ones.
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