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Town of Benson

Sewage treatment plant, Benson, Vermont. NPDES permit VT0100498 expired Jun 30, 2024; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (26 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, 5-day, 20 deg. C, monthly average6.77≤ 4.4 lb/d54%
March 2026BOD, 5-day, 20 deg. C, weekly average6.77≤ 6.6 lb/d3%
March 2026BOD, 5-day, percent removal, monthly minimum52.5≥ 85 %217%
March 2026Solids, total suspended, monthly minimum60≥ 85 %29%
June 2026E. coli, thermotol, MF, MTEC, instantaneous maximum1700≤ 77 CFU/100mL2108%

Limits in force (61)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LApr–Jun
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. Cweekly average≤ 45 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. Cdaily maximum≤ 50 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. Cmonthly average≤ 4.4 lb/dApr–Jun
BOD, 5-day, 20 deg. Cmonthly average≤ 4.4 lb/dOct–Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 4.4 lb/dJul–Sep
BOD, 5-day, 20 deg. Cmonthly average≤ 4.4 lb/dJan–Mar
BOD, 5-day, 20 deg. Cweekly average≤ 6.6 lb/dApr–Jun
BOD, 5-day, 20 deg. Cweekly average≤ 6.6 lb/dOct–Dec
BOD, 5-day, 20 deg. Cweekly average≤ 6.6 lb/dJul–Sep
BOD, 5-day, 20 deg. Cweekly average≤ 6.6 lb/dJan–Mar
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jul–Sep
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 45 mg/LOct–Dec
Solids, total suspendedmonthly average≤ 45 mg/LJul–Sep
Solids, total suspendedmonthly average≤ 45 mg/LApr–Jun
Solids, total suspendedmonthly average≤ 45 mg/LJan–Mar
Solids, total suspendedweekly average≤ 45 mg/LOct–Dec
Solids, total suspendedweekly average≤ 45 mg/LJul–Sep
Solids, total suspendedweekly average≤ 45 mg/LApr–Jun
Solids, total suspendedweekly average≤ 45 mg/LJan–Mar
Solids, total suspendeddaily maximum≤ 50 mg/LOct–Dec
Solids, total suspendeddaily maximum≤ 50 mg/LJul–Sep
Solids, total suspendeddaily maximum≤ 50 mg/LApr–Jun
Solids, total suspendeddaily maximum≤ 50 mg/LJan–Mar
Solids, total suspendedmonthly average≤ 6.6 lb/dOct–Dec
Solids, total suspendedmonthly average≤ 6.6 lb/dJul–Sep
Solids, total suspendedmonthly average≤ 6.6 lb/dApr–Jun
Solids, total suspendedmonthly average≤ 6.6 lb/dJan–Mar
Solids, total suspendedweekly average≤ 6.6 lb/dOct–Dec
Solids, total suspendedweekly average≤ 6.6 lb/dJul–Sep
Solids, total suspendedweekly average≤ 6.6 lb/dApr–Jun
Solids, total suspendedweekly average≤ 6.6 lb/dJan–Mar
Solids, total suspendedmonthly averagereport only (mg/L)Jul–Sep
Solids, total suspendedmonthly minimum≥ 85 %all year
Solids, settleableinstantaneous maximum≤ 1 mL/Lall year
Nitrogen, total [as N]daily maximumreport only (mg/L)Jul–Sep
Nitrogen, total [as N]daily maximumreport only (lb/d)Jul–Sep
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
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 averagereport only (mg/L)Jul–Sep
Phosphorus, total [as P]annual total≤ 268 lb/yrDec
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLOct–Dec
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLApr–Jun
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLJul–Sep
E. coli, thermotol, MF, MTECinstantaneous maximum≤ 77 CFU/100mLJan–Mar
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantannual average≤ .0177 MGDDec
Chlorine, total residualinstantaneous maximum≤ .05 mg/Lall year
BOD, 5-day, 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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