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Federal facility (Fish Hatcheries And Preserves), Wadmalaw Island, South Carolina. NPDES permit SC0047848 expired Jul 31, 2020; its limits still apply. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Nitrogen, ammonia total [as N], monthly average | 3.2 | ≤ 2 mg/L | 60% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 15 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 30 mg/L | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 135 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 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 |
| Duration of discharge | daily maximum | report only (d/mo) | all year | 001 |
| Turbidity, lab, NTU | monthly average | report only (NTU) | all year | 001 |
| Turbidity, lab, NTU | daily maximum | report only (NTU) | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 15 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 30 mg/L | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 135 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | all year | 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 |
| Duration of discharge | daily maximum | report only (d/mo) | all year | 002 |
| Turbidity, lab, NTU | monthly average | report only (NTU) | all year | 002 |
| Turbidity, lab, NTU | daily maximum | report only (NTU) | all year | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 15 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 30 mg/L | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 135 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Duration of discharge | daily maximum | report only (d/mo) | all year | 003 |
| Turbidity, lab, NTU | monthly average | report only (NTU) | all year | 003 |
| Turbidity, lab, NTU | daily maximum | report only (NTU) | all year | 003 |
Cited limits by parameter: South Carolina's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/SC0047848 · MCP: https://passage-data.com/mcp