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Town of Plainfield

Sewage treatment plant, Plainfield, Vermont. NPDES permit VT0100781 expired Sep 30, 2025; its limits still apply. Last 12 months: over a limit 2 times (last November 2025), 32 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 (22 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 32 required values missing, 8 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025E. coli, thermotol, MF, MTEC, instantaneous maximum260≤ 160 #/100mL63%
November 2025E. coli, thermotol, MF, MTEC, instantaneous maximum260≤ 160 #/100mL63%

Limits in force (24)

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≤ 25 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 37.5 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all 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≤ 25 lb/dall year
Solids, total suspendedweekly average≤ 37.5 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, settleableinstantaneous maximum≤ 1 mL/Lall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]annual total≤ 304 lb/yrDec
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 160 #/100mLall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantannual average≤ .125 MGDDec
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/VT0100781 · MCP: https://passage-data.com/mcp