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Frederick-Winchester Service Authority

Sewage treatment plant, major discharger, Winchester, Virginia. NPDES permit VA0065552, in force until Aug 31, 2031. Last 12 months: over a limit 3 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (20 values), form A1 yearly, form Q1 quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 13 reports late

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

Period endingParameterReportedLimitOver by
July 2026Nitrogen, ammonia total [as N], maximum weekly average2.35≤ 1.7 mg/L38%
August 2026Chlorine, total residual, monthly average.013≤ .0089 mg/L46%
August 2026Chlorine, total residual, maximum weekly average.027≤ .0095 mg/L184%

Limits in force (28)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 7.1 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 7 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 207 kg/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 480 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 29 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 44 mg/Lall year
Solids, total suspendedmonthly average≤ 1400 kg/dall year
Solids, total suspendedmaximum weekly average≤ 2100 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.4 mg/Lall year
Chloride [as Cl]monthly average≤ 415 mg/Lall year
Chloride [as Cl]maximum weekly average≤ 415 mg/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ 12.6 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .0087 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .0092 mg/Lall year
BOD, percent removal [total]monthly average minimum≥ 85 %all year
E. coligeometric mean≤ 122 #/100mLall year
Nitrogen, Total As Nannual average≤ 3 mg/Lall year
Phosphorus, Total As Pannual average≤ .3 mg/Lall year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamaximum≤ 1.82 tox chronicall year
TU Static Renewal 7-Day Chronic Pimphales promelasmaximum≤ 1.82 tox chronicall 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/VA0065552 · MCP: https://passage-data.com/mcp