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Sewage treatment plant, major discharger, Brockton, Massachusetts. NPDES permit MA0101010 expired Mar 31, 2022; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | Apr–Oct |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.3 SU | all year |
| Solids, total suspended | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 5 mg/L | May–Oct |
| Solids, total suspended | weekly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 8 mg/L | May–Oct |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 15 mg/L | May–Oct |
| Solids, total suspended | monthly average | ≤ 2250 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 750 lb/d | May–Oct |
| Solids, total suspended | daily maximum | ≤ 4500 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 2250 lb/d | May–Oct |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | weekly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | monthly average | report only (lb/d) | all year |
| Solids, total suspended | daily maximum | report only (lb/d) | all year |
| Solids, total suspended | weekly average | ≤ 1200 lb/d | May–Oct |
| Solids, total suspended | weekly average | ≤ 3750 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | monthly average | ≤ 450 lb/d | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.3 mg/L | Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.5 mg/L | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.2 mg/L | May |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 1 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.5 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug, Nov |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 150 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 480 lb/d | May |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1426 lb/d | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 946 lb/d | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 225 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 150 lb/d | Jun–Oct |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrite total [as N] | monthly average | report only (lb/d) | May–Oct |
| Nitrogen, nitrite total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, nitrate total [as N] | monthly average | report only (lb/d) | May–Oct |
| Nitrogen, nitrate total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | May–Oct |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | May–Oct |
| Phosphorus, total [as P] | monthly average | ≤ .101 mg/L | Apr–Oct |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ 15.2 lb/d | Apr–Oct |
| Phosphorus, total [as P] | monthly average | ≤ 150 lb/d | Jan, Feb, Mar, Nov, Dec |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Aug, Nov |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | monthly average | ≤ 10.3 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 13.7 ug/L | all year |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Aug, Nov |
| Nickel, total recoverable | daily maximum | report only (mg/L) | all year |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Aug, Nov |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | Aug, Nov |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | all year |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Aug, Nov |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | all year |
| Lead, total recoverable | daily maximum | report only (mg/L) | Aug, Nov |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year |
| Copper, total recoverable | daily maximum | report only (mg/L) | Aug, Nov |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | rolling average | ≤ 18 MGD | 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 | ≤ 11 ug/L | all year |
| Chlorine, total residual | daily maximum | ≤ 19 ug/L | all year |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 126 CFU/100mL | all year |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 409 CFU/100mL | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 8 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 15 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 750 lb/d | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 2250 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 2250 lb/d | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 4500 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (lb/d) | all year |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 1200 lb/d | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 3750 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 5 C] | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 100 % | Aug, Nov |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 100 % | all year |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 98 % | Aug, Nov |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 98 % | all year |
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/MA0101010 · MCP: https://passage-data.com/mcp