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Sewage treatment plant, major discharger, Farmington, Maine. NPDES permit ME0101249 expired Jan 31, 2022; its limits still apply. Last 12 months: no values over a limit, 2 required values missing, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jun–Sep |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 33 mg/L | Jun–Sep |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 50 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 150 lb/d | Jun–Sep |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 225 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 250 lb/d | Jun–Sep |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 375 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 30 mg/L | Jun–Sep |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 225 lb/d | Jun–Sep |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 338 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 20 mg/L | Jun–Sep |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 33 mg/L | Jun–Sep |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 150 lb/d | Jun–Sep |
| Solids, total suspended | monthly average | ≤ 225 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 250 lb/d | Jun–Sep |
| Solids, total suspended | daily maximum | ≤ 375 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 30 mg/L | Jun–Sep |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 225 lb/d | Jun–Sep |
| Solids, total suspended | weekly average | ≤ 338 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Solids, settleable | daily maximum | ≤ .3 mL/L | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jun–Sep |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jun–Sep |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jun–Sep |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jun–Sep |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Jun–Sep |
| Phosphorus, total [as P] | monthly average | ≤ 5.2 lb/d | Jun–Sep |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Jun–Sep |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Jun–Sep |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | Jun–Sep |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | Jun–Sep |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year |
| Copper, total [as Cu] | monthly average | ≤ .31 lb/d | all year |
| Copper, total [as Cu] | daily maximum | ≤ .36 lb/d | all year |
| E. coli, thermotol, MF, MTEC | monthly geometric mean | ≤ 64 #/100mL | May–Sep |
| E. coli, thermotol, MF, MTEC | daily maximum | ≤ 427 #/100mL | May–Sep |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .9 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .3 mg/L | all year |
| Analytical Chemistry | value | report only (N=0;Y=1) | all year |
| Analytical Chemistry | value | report only (N=0;Y=1) | all year |
| Mercury, total [as Hg] | monthly average | ≤ 27 ng/L | all year |
| Mercury, total [as Hg] | daily maximum | ≤ 41 ng/L | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 4.9 % | all year |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 4.9 % | all year |
| Noel Statre 10Day Chronic Salvel. Salmonid | daily minimum | report only (%) | all year |
| Noel Statre 10Day Chronic Salvel. Salmonid | daily minimum | report only (%) | all year |
| NOAEL Static 48Hr Acute Ceriodaphnia dubia | daily minimum | report only (%) | all year |
| NOAEL Static 48Hr Acute Ceriodaphnia dubia | daily minimum | report only (%) | all year |
| NOAEL Static 48Hr Acute Salvel. Salmonid | daily minimum | report only (%) | all year |
| NOAEL Static 48Hr Acute Salvel. Salmonid | daily minimum | report only (%) | all year |
Cited limits by parameter: Maine's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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