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Limestone Water & Sewer District

Sewage treatment plant, Limestone, Maine. NPDES permit ME0102849 expired Jul 31, 2020; its limits still apply. Last 12 months: over a limit 5 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (37 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 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
November 2025BOD, 5-day, percent removal, monthly average minimum84 %≥ 85 %7%
March 2026BOD, 5-day, percent removal, monthly average minimum83 %≥ 85 %13%
April 2026BOD, 5-day, percent removal, monthly average minimum77 %≥ 85 %53%
May 2026BOD, 5-day, percent removal, monthly average minimum75 %≥ 85 %67%
May 2026Solids, suspended percent removal, monthly average minimum83 %≥ 85 %13%

Limits in force (42)

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≤ 313 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 521 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 469 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≤ 313 lb/dall year
Solids, total suspendeddaily maximum≤ 521 lb/dall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 469 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Copper, total [as Cu]monthly averagereport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Copper, total [as Cu]monthly average≤ .6 lb/dall year
Copper, total [as Cu]daily maximum≤ .69 lb/dall year
Aluminum, total [as Al]monthly averagereport only (mg/L)all year
Aluminum, total [as Al]monthly average≤ 3.1 lb/dall year
E. coli, thermotol, MF, MTECmonthly geometric mean≤ 126 #/100mLMay–Sep
E. coli, thermotol, MF, MTECdaily maximum≤ 949 #/100mLMay–Sep
Di[2-ethylhexyl] phthalate [DEHP]monthly averagereport only (ug/L)all year
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 3.9 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Mercury, total [as Hg]monthly average≤ 4.6 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 6.9 ng/Lall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimumreport only (%)all year
Noel Statre 10Day Chronic Salvel. Salmoniddaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Salvel. Salmoniddaily minimumreport only (%)all year
NOAEL Static 48Hr Acute Salvel. Salmoniddaily minimumreport 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/ME0102849 · MCP: https://passage-data.com/mcp