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Metal Ores, Stony Creek, Virginia. NPDES permit VA0090981, in force until Nov 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 8 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Iron, total recoverable | monthly average | ≤ 1 mg/L | all year | 001 |
| Iron, total recoverable | daily maximum | ≤ 2 mg/L | all year | 001 |
| Selenium, total recoverable | monthly average | ≤ 20 ug/L | all year | 001 |
| Selenium, total recoverable | daily maximum | ≤ 20 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ .5 mg/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | all year | 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 | monthly average | ≤ 16 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 16 ug/L | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 004 |
| pH | daily maximum | ≤ 8 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 004 |
| Iron, total recoverable | monthly average | ≤ 1 mg/L | all year | 004 |
| Iron, total recoverable | daily maximum | ≤ 2 mg/L | all year | 004 |
| Selenium, total recoverable | monthly average | ≤ 20 ug/L | all year | 004 |
| Selenium, total recoverable | daily maximum | ≤ 20 ug/L | all year | 004 |
| Zinc, total recoverable | monthly average | ≤ .5 mg/L | all year | 004 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | 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 | monthly average | ≤ 16 ug/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ 16 ug/L | all year | 004 |
| Turbidity | monthly average | report only (NTU) | all year | 901 |
| Turbidity | daily maximum | report only (NTU) | all year | 901 |
| pH | daily minimum | report only (SU) | all year | 901 |
| pH | daily maximum | report only (SU) | all year | 901 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 901 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 901 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 901 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 901 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 901 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 901 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 901 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 901 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 901 |
| Turbidity | monthly average | report only (NTU) | all year | 902 |
| Turbidity | daily maximum | report only (NTU) | all year | 902 |
| pH | daily minimum | report only (SU) | all year | 902 |
| pH | daily maximum | report only (SU) | all year | 902 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 902 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 902 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 902 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 902 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 902 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 902 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 902 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 902 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 902 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 902 |
Cited limits by parameter: Virginia's rules and the federal ones.
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