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Skowhegan Town of

Sewage treatment plant, major discharger, Skowhegan, Maine. NPDES permit ME0100625, in force until Apr 30, 2031. Last 12 months: over a limit 18 times (last June 2026), 3 of 40 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (30 values), outfall 001 form B monthly (14 values), outfall 001 form C monthly (12 values), outfall AMB form 1 monthly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
13 values over a limit, 32 required values missing, 4 of 36 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 18 values over a limit
Period endingParameterReportedLimitOver by
January 2026BOD, 5-day, 20 deg. C, daily maximum66 mg/L≤ 50 mg/L32%
January 2026BOD, 5-day, 20 deg. C, weekly average66 mg/L≤ 45 mg/L47%
January 2026Solids, settleable, daily maximum27 mL/L≤ .3 mL/L8900%
January 2026Solids, suspended percent removal, monthly average minimum79 %≥ 85 %40%
January 2026Solids, total suspended, daily maximum119 mg/L≤ 50 mg/L138%
January 2026Solids, total suspended, monthly average52.6 mg/L≤ 30 mg/L75%
January 2026Solids, total suspended, weekly average112.5 mg/L≤ 45 mg/L150%
May 2026BOD, 5-day, 20 deg. C, daily maximum54 mg/L≤ 50 mg/L8%
May 2026BOD, 5-day, 20 deg. C, monthly average40.5 mg/L≤ 30 mg/L35%
May 2026BOD, 5-day, 20 deg. C, weekly average54 mg/L≤ 45 mg/L20%
June 2026BOD, 5-day, 20 deg. C, daily maximum110 mg/L≤ 50 mg/L120%
June 2026BOD, 5-day, 20 deg. C, monthly average86.8 mg/L≤ 30 mg/L189%
June 2026BOD, 5-day, 20 deg. C, weekly average110 mg/L≤ 45 mg/L144%
June 2026BOD, 5-day, percent removal, monthly average minimum70 %≥ 85 %100%
June 2026Solids, suspended percent removal, monthly average minimum72 %≥ 85 %87%
June 2026Solids, total suspended, daily maximum68 mg/L≤ 50 mg/L36%
June 2026Solids, total suspended, monthly average52.7 mg/L≤ 30 mg/L76%
June 2026Solids, total suspended, weekly average68 mg/L≤ 45 mg/L51%

Limits in force (57)

ParameterStatisticLimitMonthsOutfall
Flow rate, instantaneousminimumreport only (gal/min)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 413 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 883 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 619 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximum≤ 50 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 413 lb/dall year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, total suspendedmonthly averagereport only (lb/d)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Solids, total suspendeddaily maximum≤ 2815 lb/dall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 619 lb/dall year001
Solids, settleabledaily maximum≤ .3 mL/Lall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun–Sep001
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–Sep001
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 64 #/100mLApr–Oct001
E. coli, thermotol, MF, MTECdaily maximumreport only (#/100mL)Apr–Oct001
E. coli, thermotol, MF, MTECdaily maximum≤ 236 #/100mLApr–Oct001
E. coli, thermotol, MF, MTECmonthly average≤ 236 #/100mLApr–Oct001
Flow, in conduit or thru treatment plantmonthly average≤ 1.65 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly totalreport only (MGD)all year001
Chlorine, total residualdaily maximumreport only (mg/L)all year001
Chlorine, total residualdaily maximum≤ 1 mg/Lall year001
Chlorine, total residualdaily maximum≤ 1 mg/Lall year001
Mercury, total [as Hg]monthly average≤ 7 ng/Lall year001
Mercury, total [as Hg]daily maximum≤ 10.6 ng/Lall year001
Overflowsmonthly totalreport only (occur/mo)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–SepAMB

How strict are these limits?

Cited limits by parameter: Maine'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/ME0100625 · MCP: https://passage-data.com/mcp