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Finishing Plants, major discharger, Colrain, Massachusetts. NPDES permit MA0003697 expired Feb 28, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year |
| Flow rate | monthly average | report only (MGD) | all year |
| Flow rate | daily maximum | ≤ .89 MGD | all year |
| Specific conductance | daily maximum | report only (umho/cm) | Jan, Apr, Jul, Oct |
| Specific conductance | daily maximum | report only (umho/cm) | Jan, Apr, Jul, Oct |
| Total production - mass | monthly average | report only (lb/d) | all year |
| Total production - mass | daily maximum | report only (lb/d) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 292 lb/d | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 510 lb/d | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | daily maximum | report only (SU) | Jan, Apr, Jul, Oct |
| pH | daily maximum | report only (SU) | Jan, Apr, Jul, Oct |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Solids, total | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Solids, total suspended | monthly average | ≤ 350 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 510 lb/d | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jan, Apr, Jul, Oct |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Jan, Apr, Jul, Oct |
| 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 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | monthly average | ≤ 1.26 mg/L | May–Oct |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | May–Oct |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Sulfide, total [as S] | monthly average | ≤ 1 lb/d | Jan, Apr, Jul, Oct |
| Sulfide, total [as S] | daily maximum | ≤ 2 lb/d | Jan, Apr, Jul, Oct |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Chromium, total [as Cr] | monthly average | report only (lb/d) | May |
| Chromium, total [as Cr] | daily maximum | ≤ 1.1 lb/d | May |
| Copper, total [as Cu] | monthly average | ≤ 22 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 22 ug/L | all year |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| 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 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Aluminum, 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 |
| 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 |
| 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 |
| Copper, total recoverable | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Phenols | monthly average | report only (lb/d) | Jan, Apr, Jul, Oct |
| Phenols | daily maximum | ≤ 1 lb/d | Jan, Apr, Jul, Oct |
| Chlorine, total residual | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| E. coli | monthly geometric mean | ≤ 126 CFU/100mL | Apr–Oct |
| E. coli | daily maximum | ≤ 409 CFU/100mL | Apr–Oct |
| Solids, total dissolved | daily maximum | report only (mg/L) | Jan, Apr, Jul, Oct |
| Chemical Oxygen Demand [COD] | monthly average | ≤ 3640 lb/d | Jan, Apr, Jul, Oct |
| Chemical Oxygen Demand [COD] | daily maximum | ≤ 7280 lb/d | Jan, Apr, Jul, Oct |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 100 % | Jan, Apr, Jul, Oct |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 7.2 % | 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
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