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Sewage treatment plant, major discharger, Salisbury, Massachusetts. NPDES permit MA0102873 expired Jan 31, 2021; its limits still apply. Last 12 months: over a limit 8 times (last May 2026), 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 5.3 mg/L | ≤ 5 mg/L | 6% |
| January 2026 | Copper, total [as Cu], monthly average | 32 ug/L | ≤ 25 ug/L | 28% |
| January 2026 | Noael Statre 7Day Chronic Menidia, daily minimum | 50 % | ≥ 100 % | 50% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 5.5 mg/L | ≤ 5 mg/L | 10% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], weekly average | 7.7 mg/L | ≤ 7 mg/L | 10% |
| February 2026 | Copper, total [as Cu], monthly average | 45 ug/L | ≤ 25 ug/L | 80% |
| March 2026 | Solids, total suspended, weekly average | 7.95 mg/L | ≤ 7 mg/L | 14% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 10.5 mg/L | ≤ 10 mg/L | 5% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | Apr–Oct |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | monthly average | ≤ 5 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 7 mg/L | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | monthly average | ≤ 54 lb/d | all year |
| Solids, total suspended | weekly average | ≤ 76 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) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5 mg/L | Jul–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 | ≤ 5 mg/L | May, Jun |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10 mg/L | Jul–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 | ≤ 10 mg/L | May, Jun |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 7 mg/L | Jul–Oct |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 7 mg/L | May, Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jul–Oct |
| 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) | Jan, Apr, Jul, Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | May, Jun |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jul–Oct |
| 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) | May, Jun |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jul–Oct |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | May, Jun |
| Nitrogen, ammonia total [as N] | weekly average | report only (lb/d) | Jul–Oct |
| Nitrogen, ammonia total [as N] | weekly average | report only (lb/d) | May, Jun |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, nitrite total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, nitrate total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Copper, total [as Cu] | monthly average | ≤ 3 ug/L | all year |
| Copper, total [as Cu] | monthly average | ≤ 25 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 3 ug/L | all year |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year |
| Nickel, total [as Ni] | monthly average | ≤ 8.3 ug/L | all year |
| Nickel, total [as Ni] | monthly average | ≤ 13 ug/L | all year |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Lead, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Copper, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | rolling average | ≤ 1.3 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Enterococci | monthly geometric mean | ≤ 35 CFU/100mL | all year |
| Enterococci | daily maximum | ≤ 104 CFU/100mL | all year |
| Coliform, fecal general | monthly geometric mean | ≤ 50 CFU/100mL | all year |
| Coliform, fecal general | weekly geometric mean | ≤ 75 CFU/100mL | all year |
| Coliform, fecal general | daily maximum | ≤ 100 CFU/100mL | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 7 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 | ≤ 54 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 76 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | 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 Menidia | daily minimum | ≥ 100 % | Jan, Apr, Jul, Oct |
| Noael Statre 7Day Chronic Menidia | daily minimum | ≥ 100 % | Jan, Apr, Jul, Oct |
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/MA0102873 · MCP: https://passage-data.com/mcp