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Sewerage Systems, Green Pond, South Carolina. NPDES permit SC0037788, in force until Oct 31, 2029. Last 12 months: no values over a limit, 4 required values missing, 9 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 1 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 60 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 3 lb/d | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 6 lb/d | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 180 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 8 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 16 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | monthly average | ≤ .5 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year |
| Chlorine, total residual | monthly average | ≤ .04 lb/d | all year |
| Chlorine, total residual | daily maximum | ≤ .08 lb/d | all year |
| Enterococci | monthly average | ≤ 35 MPN/100mL | all year |
| Enterococci | daily maximum | ≤ 104 MPN/100mL | all year |
| Enterococci | 30-day geometric mean | ≤ 35 MPN/100mL | all year |
| Enterococci | daily maximum | ≤ 800 MPN/100mL | all year |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year |
| Coliform, fecal general | 30-day geometric mean | ≤ 14 MPN/100mL | all year |
| Coliform, fecal general | daily maximum | ≤ 43 MPN/100mL | all year |
| Coliform, fecal general | 30-day geometric mean | ≤ 14 MPN/100mL | all year |
| Coliform, fecal general | daily maximum | ≤ 200 MPN/100mL | all year |
Cited limits by parameter: South Carolina's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/SC0037788 · MCP: https://passage-data.com/mcp