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Town of Orwell

Sewage treatment plant, Orwell, Vermont. NPDES permit VT0100676 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit, 16 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values)
Last report on file
July 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (50)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LOct–Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJul–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan–Mar
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LApr–Jun
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LOct–Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJul–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan–Mar
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LApr–Jun
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LOct–Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LJul–Sep
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LJan–Mar
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LApr–Jun
BOD, 5-day, 20 deg. Cmonthly average≤ 8.3 lb/dOct–Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 8.3 lb/dJul–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 8.3 lb/dJan–Mar
BOD, 5-day, 20 deg. Cmonthly average≤ 8.3 lb/dApr–Jun
BOD, 5-day, 20 deg. Cweekly average≤ 12.4 lb/dOct–Dec
BOD, 5-day, 20 deg. Cweekly average≤ 12.4 lb/dJul–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 12.4 lb/dJan–Mar
BOD, 5-day, 20 deg. Cweekly average≤ 12.4 lb/dApr–Jun
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/LJan–Mar
Solids, total suspendedmonthly average≤ 30 mg/LApr–Jun
Solids, total suspendedmonthly average≤ 30 mg/LOct–Dec
Solids, total suspendedmonthly average≤ 30 mg/LJul–Sep
Solids, total suspendedweekly average≤ 45 mg/LJan–Mar
Solids, total suspendedweekly average≤ 45 mg/LApr–Jun
Solids, total suspendedweekly average≤ 45 mg/LOct–Dec
Solids, total suspendedweekly average≤ 45 mg/LJul–Sep
Solids, total suspendeddaily maximum≤ 50 mg/LJan–Mar
Solids, total suspendeddaily maximum≤ 50 mg/LApr–Jun
Solids, total suspendeddaily maximum≤ 50 mg/LOct–Dec
Solids, total suspendeddaily maximum≤ 50 mg/LJul–Sep
Solids, total suspendedmonthly average≤ 8.3 lb/dJan–Mar
Solids, total suspendedmonthly average≤ 8.3 lb/dApr–Jun
Solids, total suspendedmonthly average≤ 8.3 lb/dOct–Dec
Solids, total suspendedmonthly average≤ 8.3 lb/dJul–Sep
Solids, total suspendedweekly average≤ 12.4 lb/dJan–Mar
Solids, total suspendedweekly average≤ 12.4 lb/dApr–Jun
Solids, total suspendedweekly average≤ 12.4 lb/dOct–Dec
Solids, total suspendedweekly average≤ 12.4 lb/dJul–Sep
Solids, settleabledaily maximum≤ 1 mL/Lall year
Phosphorus, total [as P]annual total≤ 502 lb/yrDec
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLOct
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLApr–Jun
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLJul–Sep
Flow, in conduit or thru treatment plantannual average≤ .033 MGDDec
Chlorine, total residualweekly average≤ 1 mg/LApr, Jun, Jul, Aug, Sep, Oct
Chlorine, total residualinstantaneous maximum≤ 2 mg/LApr, Jun, Jul, Aug, Sep, Oct

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/VT0100676 · MCP: https://passage-data.com/mcp