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Scarborough Sanitary District

Sewage treatment plant, major discharger, Scarborough, Maine. NPDES permit ME0102059 expired Oct 31, 2024; its limits still apply. Last 12 months: over a limit 2 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (25 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
September 2026Coliform, fecal general, daily maximum41 #/100mL≤ 31 #/100mL32%
September 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum200 #/100mL≤ 54 #/100mL270%

Limits in force (25)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 625 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 1042 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 938 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Solids, total suspendedmonthly average≤ 625 lb/dall year
Solids, total suspendeddaily maximum≤ 1042 lb/dall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 938 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Enterococci: group D, MF trans, M-E, EIAmonthly geometric mean≤ 8 #/100mLApr–Oct
Enterococci: group D, MF trans, M-E, EIAdaily maximum≤ 54 #/100mLApr–Oct
Flow, in conduit or thru treatment plantmonthly average≤ 2.5 MGDall year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
Mercury, total [as Hg]monthly average≤ 82.5 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 123.8 ng/Lall year
Coliform, fecal generalmonthly geometric mean≤ 14 #/100mLall year
Coliform, fecal generaldaily maximum≤ 31 #/100mLall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Maine's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ME0102059 · MCP: https://passage-data.com/mcp