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Limerick Sewerage District

Sewage treatment plant, Limerick, Maine. NPDES permit ME0100871 expired Oct 31, 2020; its limits still apply. Last 12 months: over a limit once (last November 2025), 5 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (35 values), outfall 002 form A monthly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 4 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Flow, in conduit or thru treatment plant, monthly average.112 MGD≤ .11 MGD2%

Limits in force (42)

ParameterStatisticLimitMonthsOutfall
Depth, max of samplemonthly averagereport only (ft)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 28 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 46 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 41 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 50 mg/Lall year001
Solids, total suspendedmonthly average≤ 28 lb/dall year001
Solids, total suspendeddaily maximum≤ 46 lb/dall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 41 lb/dall year001
Phosphorus, total [as P]monthly averagereport only (ug/L)Jun–Sep001
Phosphorus, total [as P]daily maximumreport only (ug/L)Jun–Sep001
Copper, total [as Cu]daily maximumreport only (ug/L)all year001
Copper, total [as Cu]daily maximum≤ .021 lb/dall year001
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 64 #/100mLMay–Sep001
E. coli, thermotol, MF, MTECdaily maximum≤ 427 #/100mLMay–Sep001
Priority Pollutantsvaluereport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly average≤ .11 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .1 mg/Lall year001
Chlorine, total residualdaily maximum≤ .2 mg/Lall year001
Analytical Chemistryvaluereport only (N=0;Y=1)all year001
Analytical Chemistryvaluereport only (N=0;Y=1)all year001
Mercury, total [as Hg]monthly average≤ 18.6 ng/Lall year001
Mercury, total [as Hg]daily maximum≤ 27.8 ng/Lall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year001
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year001
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimumreport only (%)all year001
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimumreport only (%)all year001
NOAEL Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year001
NOAEL Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year001
NOAEL Static 48Hr Acute Salvel. Salmoniddaily minimumreport only (%)all year001
NOAEL Static 48Hr Acute Salvel. Salmoniddaily minimumreport only (%)all year001
Stream flow, instantaneousdaily maximumreport only (cfs)Jun–Sep002
Phosphorus, total [as P]daily maximumreport only (ug/L)Jun–Sep002

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/ME0100871 · MCP: https://passage-data.com/mcp