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City of Vergennes

Sewage treatment plant, Vergennes, Vermont. NPDES permit VT0100404 expired Dec 31, 2009; its limits still apply. Last 12 months: over a limit 12 times (last May 2026), 60 required values missing, 4 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (20 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
12 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
January 2026Phosphorus, total [as P], monthly average.91≤ .8 mg/L14%
February 2026Phosphorus, total [as P], monthly average1.2≤ .8 mg/L50%
February 2026Solids, suspended percent removal, monthly minimum68.5≥ 85 %110%
February 2026Solids, total suspended, daily maximum51≤ 50 mg/L2%
February 2026Solids, total suspended, monthly average51≤ 30 mg/L70%
February 2026Solids, total suspended, weekly average51≤ 45 mg/L13%
March 2026Chlorine, total residual, weekly average1.03≤ 1 mg/L3%
March 2026Chlorine, total residual, weekly average1.03≤ 1 mg/L3%
April 2026Phosphorus, total [as P], monthly average.86≤ .8 mg/L8%
April 2026Solids, suspended percent removal, monthly minimum75≥ 85 %67%
May 2026Chlorine, total residual, weekly average1.18≤ 1 mg/L18%
May 2026Solids, suspended percent removal, monthly minimum79.4≥ 85 %37%

Limits in force (21)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 165 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 248 lb/dall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Solids, total suspendedmonthly average≤ 165 lb/dall year
Solids, total suspendedweekly average≤ 248 lb/dall year
Solids, settleableinstantaneous maximum≤ 1 mL/Lall year
Phosphorus, total [as P]monthly average≤ .8 mg/Lall year
Phosphorus, total [as P]annual total≤ 1369 lb/dDec
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 #/100mLall year
Flow, in conduit or thru treatment plantannual average≤ .75 MGDall year
Chlorine, total residualweekly average≤ 1 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ 2 mg/Lall year
BOD, 5-day, percent removalmonthly minimum≥ 85 %all year
Solids, suspended percent removalmonthly minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Vermont'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/VT0100404 · MCP: https://passage-data.com/mcp