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Biddeford City of

Sewage treatment plant, major discharger, Biddeford, Maine. NPDES permit ME0100048 expired Apr 30, 2026; its limits still apply. Last 12 months: over a limit 7 times (last September 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (34 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
June 2026pH, minimum5.83 SU≥ 6 SU—
September 2026BOD, 5-day, 20 deg. C, daily maximum268 mg/L≤ 50 mg/L436%
September 2026BOD, 5-day, 20 deg. C, weekly average62 mg/L≤ 45 mg/L38%
September 2026Enterococci, daily maximum112 #/100mL≤ 94 #/100mL19%
September 2026Solids, suspended percent removal, monthly average minimum84 %≥ 85 %7%
September 2026Solids, total suspended, daily maximum408 mg/L≤ 50 mg/L716%
September 2026Solids, total suspended, weekly average87 mg/L≤ 45 mg/L93%

Limits in force (36)

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≤ 1626 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 2439 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≤ 1626 lb/dall year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 2439 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximum≤ 916 lb/dall year
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 14 MPN/100mLall year
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximum≤ 31 MPN/100mLall year
Di[2-ethylhexyl] phthalate [DEHP]monthly averagereport only (mg/L)all year
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 2.97 lb/dall year
Flow, in conduit or thru treatment plantmonthly average≤ 6.5 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .13 mg/Lall year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Enterococcimonthly average≤ 14 #/100mLApr–Oct
Enterococcidaily maximum≤ 94 #/100mLApr–Oct
Mercury, total [as Hg]average≤ 14.6 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 33.8 ng/Lall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulatavaluereport only (%)all year
NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulatavaluereport only (%)all year
NOAEL Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)valuereport only (%)all year
NOAEL Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)valuereport only (%)all year

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/ME0100048 · MCP: https://passage-data.com/mcp