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Lead And Zinc Ores, major discharger, Boss, Missouri. NPDES permit MO0002003 expired Jun 30, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 65 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 120 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 80 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 002 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 1500 ug/L | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ 750 ug/L | all year | 002 |
| Cadmium, total recoverable | daily maximum | ≤ 100 ug/L | all year | 002 |
| Cadmium, total recoverable | monthly average | ≤ 50 ug/L | all year | 002 |
| Lead, total recoverable | daily maximum | ≤ 67.4 ug/L | all year | 002 |
| Lead, total recoverable | monthly average | ≤ 28.9 ug/L | all year | 002 |
| Copper, total recoverable | daily maximum | ≤ 300 ug/L | all year | 002 |
| Copper, total recoverable | monthly average | ≤ 150 ug/L | all year | 002 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Chloride | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | value | ≤ 1.8 toxic | all year | 002 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | ≤ 1.8 toxic | all year | 002 |
| Mercury, total recoverable | daily maximum | ≤ 2 ug/L | all year | 002 |
| Mercury, total recoverable | monthly average | ≤ 1 ug/L | all year | 002 |
| Precipitation volume | daily maximum | report only (in/d) | all year | 002 |
| Precipitation volume | monthly average | report only (in/d) | all year | 002 |
| Chlorides + Sulfates | daily maximum | ≤ 1000 mg/L | all year | 002 |
Cited limits by parameter: Missouri's rules and the federal ones.
Same industry: the 12 Metal Mining permits in Missouri.
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Your permit document is the final word. As JSON: /api/v1/permits/MO0002003 · MCP: https://passage-data.com/mcp