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Sewage treatment plant, major discharger, Marion, Massachusetts. NPDES permit MA0100030 expired Nov 30, 2022; its limits still apply. Last 12 months: no values over a limit, 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 5 mg/L | Jun–Oct |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 9 mg/L | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 13 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 42 lb/d | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 63 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 average | report only (lb/d) | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.3 SU | all year |
| Solids, total suspended | monthly average | ≤ 9 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 13 mg/L | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | monthly average | ≤ 42 lb/d | all year |
| Solids, total suspended | weekly average | ≤ 63 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Apr–Oct |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Apr–Oct |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Apr–Oct |
| Nitrogen, total [as N] | rolling average | ≤ 4 mg/L | Apr–Oct |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Apr–Oct |
| Nitrogen, total [as N] | monthly average | ≤ 19.6 lb/d | Apr–Oct |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.74 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.6 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12.75 lb/d | May |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.53 lb/d | Jun–Oct |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Apr–Oct |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Apr–Oct |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Apr–Oct |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ 200 ug/L | Apr–Oct |
| Phosphorus, total [as P] | monthly average | report only (ug/L) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | monthly average | report only (ug/L) | Apr–Oct |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | Apr–Oct |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | Apr–Oct |
| Phosphorus, total [as P] | monthly average | ≤ .98 lb/d | Apr–Oct |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Apr–Oct |
| Nickel, total recoverable | monthly average | report only (ug/L) | Feb, May, Aug, Nov |
| Zinc, total recoverable | monthly average | report only (ug/L) | Feb, May, Aug, Nov |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Feb, May, Aug, Nov |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Feb, May, Aug, Nov |
| Lead, total recoverable | monthly average | report only (ug/L) | Feb, May, Aug, Nov |
| Copper, total recoverable | monthly average | ≤ 7.9 ug/L | all year |
| Copper, total recoverable | monthly average | ≤ 20 ug/L | all year |
| Copper, total recoverable | monthly average | report only (ug/L) | Feb, May, Aug, Nov |
| Copper, total recoverable | daily maximum | ≤ 113 ug/L | all year |
| Copper, total recoverable | daily maximum | report only (ug/L) | 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 |
| Flow, in conduit or thru treatment plant | rolling average | ≤ .588 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Enterococci | monthly average | ≤ 35 CFU/100mL | all year |
| Enterococci | daily maximum | ≤ 276 CFU/100mL | all year |
| Coliform, fecal general | monthly geometric mean | ≤ 14 CFU/100mL | all year |
| Coliform, fecal general | daily maximum | ≤ 28 CFU/100mL | all year |
| BOD, 5-day, percent removal | daily minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | daily minimum | ≥ 85 % | all year |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 100 % | Feb, May, Aug, Nov |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 100 % | Feb, May, Aug, Nov |
Cited limits by parameter: Massachusetts'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/MA0100030 · MCP: https://passage-data.com/mcp