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Water Supply, St. Thomas, the U.S. Virgin Islands. NPDES permit VI0040479 expired May 31, 2024; its limits still apply. Last 12 months: no values over a limit, 28 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | ≤ 32 deg C | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 7 SU | all year | 001 |
| pH | maximum | ≤ 8.3 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorous, total organic [as P] | daily maximum | report only (ug/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 | ≤ .12 MGD | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 1 ug/L | all year | 001 |
| Enterococci | daily maximum | ≤ 200 #/100mL | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | ≤ 32 deg C | all year | 002 |
| pH | minimum | ≥ 7 SU | all year | 002 |
| pH | maximum | ≤ 8.3 SU | all year | 002 |
| Salinity | daily maximum | report only (ppk) | all year | 002 |
| Oil & Grease | daily maximum | report only (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 | ≤ .3 MGD | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
Cited limits by parameter: we hold no rule of the U.S. Virgin Islands's own; the federal ones.
Same industry: the 9 Water Supply permits in the U.S. Virgin Islands.
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Your permit document is the final word. As JSON: /api/v1/permits/VI0040479 · MCP: https://passage-data.com/mcp