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Sewage treatment plant, major discharger, Old Town, Maine. NPDES permit ME0100471, in force until Sep 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 50 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 50 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 425 lb/d | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 875 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 874 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 425 lb/d | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 638 lb/d | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 1314 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 1314 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 638 lb/d | Jun–Sep | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jun–Sep | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | Jun–Sep | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 425 lb/d | Jun–Sep | 001 |
| Solids, total suspended | monthly average | ≤ 875 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | Jun–Sep | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jun–Sep | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Jun–Sep | 001 |
| Solids, total suspended | monthly average | ≤ 875 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 425 lb/d | Jun–Sep | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | Jun–Sep | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jun–Sep | 001 |
| Solids, total suspended | weekly average | ≤ 1314 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 638 lb/d | Jun–Sep | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jun–Sep | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 638 lb/d | Jun–Sep | 001 |
| Solids, total suspended | weekly average | ≤ 1314 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, settleable | daily maximum | ≤ .3 mL/L | all year | 001 |
| E. coli, thermotol, MF, MTEC | monthly geometric mean | ≤ 64 #/100mL | Apr–Oct | 001 |
| E. coli, thermotol, MF, MTEC | daily maximum | ≤ 236 #/100mL | Apr–Oct | 001 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 3.5 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ 18.6 ng/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ 27.8 ng/L | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Flow rate | daily maximum | report only (gal/min) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 002 |
| E. coli, thermotol, MF, MTEC | daily maximum | report only (#/100mL) | Apr–Oct | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | 002 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 002 |
| Overflows | monthly total | report only (occur/mo) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 2858 lb/d | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 6683 lb/d | all year | 003 |
| E. coli, thermotol, MF, MTEC | daily maximum | ≤ 236 #/100mL | Apr–Oct | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly total | report only (MGD) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 003 |
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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