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Sewage treatment plant, Rockingham, Vermont. NPDES permit VT0100609 expired Dec 31, 2022; its limits still apply. Last 12 months: no values over a limit, 11 required values missing, 5 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 50 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 26.3 lb/d | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 39.4 lb/d | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly minimum | ≥ 85 % | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 26.3 lb/d | all year |
| Solids, total suspended | weekly average | ≤ 39.4 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, settleable | instantaneous maximum | ≤ 1 mL/L | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jul–Sep |
| Nitrogen, total [as N] | annual average | ≤ 7 lb/d | Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jul–Sep |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jul–Sep |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| E. coli, thermotol, MF, MTEC | instantaneous maximum | ≤ 77 #/100mL | Apr–Oct |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | annual average | ≤ .105 MGD | Dec |
| BOD, 5-day, percent removal | monthly minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly minimum | ≥ 85 % | all year |
Cited limits by parameter: Vermont'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/VT0100609 · MCP: https://passage-data.com/mcp