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Village of Northfield

Sewage treatment plant, major discharger, Northfield, Vermont. NPDES permit VT0100242 expired Sep 30, 2025; its limits still apply. Last 12 months: over a limit 8 times (last June 2026), 23 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (23 values)
Last report on file
July 2026
Oct 2024 – Sep 2025
7 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
December 2025Copper, total [as Cu], 30-day average.03815≤ .027 mg/L41%
January 2026Copper, total [as Cu], 30-day average.036≤ .027 mg/L33%
February 2026Copper, total [as Cu], 30-day average.03355≤ .027 mg/L24%
February 2026Phosphorus, total [as P], monthly average.87≤ .8 mg/L9%
April 2026Copper, total [as Cu], 30-day average.0345≤ .027 mg/L28%
April 2026E. coli, thermotol, MF, MTEC, instantaneous maximum200≤ 77 #/100mL160%
May 2026Copper, total [as Cu], 30-day average.0285≤ .027 mg/L6%
June 2026Copper, total [as Cu], 30-day average.029≤ .027 mg/L7%

Limits in force (25)

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≤ 250 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 375 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≤ 250 lb/dall year
Solids, total suspendedweekly average≤ 375 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≤ 608 lb/yrDec
Copper, total [as Cu]30-day average≤ .027 mg/Lall year
Copper, total [as Cu]daily maximum≤ .048 mg/Lall year
Copper, total [as Cu]30-day average≤ .23 lb/dall year
Copper, total [as Cu]daily maximum≤ .36 lb/dall year
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 #/100mLall year
Flow, in conduit or thru treatment plantannual average≤ 1 MGDDec
Chlorine, total residualweekly average≤ .06 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .1 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VT0100242 · MCP: https://passage-data.com/mcp