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Town of Swanton

Sewage treatment plant, major discharger, Swanton, Vermont. NPDES permit VT0100501 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 4 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (27 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, suspended percent removal, monthly minimum84≥ 85 %7%
January 2026Solids, suspended percent removal, monthly minimum83.6≥ 85 %9%
March 2026Solids, suspended percent removal, monthly minimum80≥ 85 %33%
May 2026Solids, suspended percent removal, monthly minimum57.4≥ 85 %184%

Limits in force (29)

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≤ 225 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 338 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≤ 225 lb/dall year
Solids, total suspendedweekly average≤ 338 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, settleabledaily maximum≤ 1 mL/Lall year
Nitrogen, total [as N]daily maximumreport only (mg/L)Jul–Sep
Nitrogen, total [as N]monthly averagereport only (lb/d)Jul–Sep
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jul–Sep
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jul–Sep
Phosphorus, total [as P]monthly average≤ .8 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]annual totalreport only (lb/d)all year
Phosphorus, total [as P]monthly total≤ 225 lb/dall year
Phosphorus, total [as P]annual total≤ 548 lb/yrDec
E. coli, thermotol, MF, MTECdaily maximum≤ 77 CFU/100mLall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantannual average≤ .9 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/VT0100501 · MCP: https://passage-data.com/mcp