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Frederick County Public Schools

Sewage treatment plant, Winchester, Virginia. NPDES permit VA0071927, in force until Nov 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (16 values), form A1 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (22)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6.7 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ .79 kg/dall year
Solids, total suspendedmaximum weekly average≤ 1.2 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LJun–Dec
Nitrogen, ammonia total [as N]monthly average≤ 4.9 mg/LJan–May
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.9 mg/LJun–Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 4.9 mg/LJan–May
Flow, in conduit or thru treatment plantmonthly average≤ .007 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
E. coligeometric mean≤ 126 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 14 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 21 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ .37 kg/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ .56 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Virginia'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/VA0071927 · MCP: https://passage-data.com/mcp