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Vinalhaven Town of

Sewage treatment plant, Vinalhaven, Maine. NPDES permit ME0102491 expired Apr 30, 2023; its limits still apply. Last 12 months: over a limit 6 times (last August 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
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
July 2026Solids, suspended percent removal, monthly average minimum72.1 %≥ 85 %86%
July 2026Solids, total suspended, monthly average35.7 mg/L≤ 30 mg/L19%
August 2026BOD, 5-day, 20 deg. C, daily maximum68 mg/L≤ 50 mg/L36%
August 2026BOD, 5-day, 20 deg. C, monthly average32 mg/L≤ 30 mg/L7%
August 2026BOD, 5-day, 20 deg. C, weekly average68 mg/L≤ 45 mg/L51%
August 2026Coliform, fecal MF, MFC broth, 44.5 C, daily maximum4839 #/100mL≤ 400 #/100mL1110%

Limits in force (26)

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≤ 32 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 54 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 48 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≤ 32 lb/dall year
Solids, total suspendeddaily maximum≤ 54 lb/dall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 48 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximum≤ 400 #/100mLMay–Sep
Flow, in conduit or thru treatment plantmonthly average≤ .129 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all 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≤ 28.3 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 42.4 ng/Lall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Noael Static 48Hr Acute Mysid. Bahiadaily 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/ME0102491 · MCP: https://passage-data.com/mcp