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Gray And Ductile Iron Foundries, Zanesville, Ohio. NPDES permit OH0004901, in force until Dec 31, 2030. Last 12 months: over a limit 4 times (last February 2026), 1 required value missing, 1 of 71 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | Phenolics, total recoverable, daily maximum | 1170 | ≤ 860 ug/L | 36% |
| January 2026 | Phenolics, total recoverable, monthly average | 585 | ≤ 300 ug/L | 95% |
| February 2026 | Phenolics, total recoverable, daily maximum | 1214 | ≤ 860 ug/L | 41% |
| February 2026 | Phenolics, total recoverable, monthly average | 563.7 | ≤ 300 ug/L | 88% |
| 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 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 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 | report only (mg/L) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 002 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 002 |
| Flow rate | monthly average | report only (gal/d) | all year | 003 |
| Flow rate | daily maximum | report only (gal/d) | all year | 003 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar, Jun, Sep, Dec | 003 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Jun, Sep, Dec | 003 |
| pH | daily maximum | ≤ 9 SU | Mar, Jun, Sep, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Mar, Jun, Sep, Dec | 003 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | Mar, Jun, Sep, Dec | 003 |
| Solids, total suspended | monthly average | ≤ .194 kg/d | Mar, Jun, Sep, Dec | 003 |
| Solids, total suspended | daily maximum | ≤ .29 kg/d | Mar, Jun, Sep, Dec | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Turbidity [severity] | monthly average | report only (severity) | all year | 003 |
| Turbidity [severity] | daily maximum | report only (severity) | all year | 003 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | Jun, Sep | 003 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 284 MPN/100mL | Jun, Sep | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Mar, Jun, Sep, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | Mar, Jun, Sep, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ .161 kg/d | Mar, Jun, Sep, Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ .258 kg/d | Mar, Jun, Sep, Dec | 003 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 004 |
| pH | daily minimum | ≥ 6.5 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 004 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 005 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 38 mg/L | all year | 005 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 10 mg/L | Mar, Jun, Sep, Dec | 005 |
| Lead, total [as Pb] | monthly average | ≤ 260 ug/L | all year | 005 |
| Lead, total [as Pb] | daily maximum | ≤ 530 ug/L | all year | 005 |
| Zinc, total [as Zn] | monthly average | ≤ 370 ug/L | all year | 005 |
| Zinc, total [as Zn] | daily maximum | ≤ 430 ug/L | all year | 005 |
| Copper, total recoverable | daily maximum | ≤ 54 ug/L | all year | 005 |
| Phenolics, total recoverable | monthly average | ≤ 300 ug/L | all year | 005 |
| Phenolics, total recoverable | daily maximum | ≤ 860 ug/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| pH, maximum | daily maximum | report only (SU) | all year | 005 |
| pH, minimum | daily minimum | report only (SU) | all year | 005 |
| pH range excursions, > 60 minutes | daily maximum | ≤ 0 occur/d | all year | 005 |
| pH range excursions, monthly total accum | daily maximum | ≤ 446 min | all year | 005 |
| Flow rate | monthly average | report only (gal/d) | Mar, Jun, Sep, Dec | 008 |
| Flow rate | daily maximum | report only (gal/d) | Mar, Jun, Sep, Dec | 008 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 008 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 008 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 008 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 008 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 008 |
| Flow rate | monthly average | report only (gal/d) | Mar, Jun, Sep, Dec | 010 |
| Flow rate | daily maximum | report only (gal/d) | Mar, Jun, Sep, Dec | 010 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 010 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 010 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 010 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 010 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 010 |
| Solids, total suspended | daily maximum | ≤ 1.6787 kg/d | Dec | 092 |
| Oil and grease, hexane extr method | daily maximum | ≤ .8481 kg/d | Dec | 092 |
| Copper, total [as Cu] | daily maximum | ≤ .0236 kg/d | Dec | 092 |
| Lead, total [as Pb] | daily maximum | ≤ .0254 kg/d | Dec | 092 |
| Zinc, total [as Zn] | daily maximum | ≤ .0436 kg/d | Dec | 092 |
| Phenolics, total recoverable | daily maximum | ≤ .0329 kg/d | Dec | 092 |
| Flow, total | monthly average | report only (Mgal) | Dec | 092 |
| Flow, total | daily maximum | report only (Mgal) | Dec | 092 |
| Sludge waste from secondary clarifiers | monthly average | report only (gal) | Dec | 588 |
| Sludge waste from secondary clarifiers | daily maximum | report only (gal) | Dec | 588 |
| 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 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 901 |
| pH | daily maximum | report only (SU) | 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 |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 56 Primary Metal Industries permits in Ohio.
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