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Frederick-Winchester Service Authority

Sewage treatment plant, major discharger, Winchester, Virginia. NPDES permit VA0075191, in force until Dec 31, 2027. Last 12 months: over a limit 2 times (last July 2026), 1 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (18 values), form Q1 quarterly (1 value), form A1 yearly
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, ammonia total [as N], maximum weekly average1.72≤ 1.3 mg/L32%
July 2026Nitrogen, ammonia total [as N], maximum weekly average.91≤ .72 mg/L26%

Limits in force (27)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 7.1 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9.5 SUall year
Solids, total suspendedmonthly average≤ 12 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 18 mg/Lall year
Solids, total suspendedmonthly average≤ 230 kg/dall year
Solids, total suspendedmaximum weekly average≤ 340 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]monthly average≤ .57 mg/LJun–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.3 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ .72 mg/LJun–Nov
Chloride [as Cl]monthly averagereport only (mg/L)all year
Chloride [as Cl]maximum weekly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 5 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
Nitrogen, Total As Nmonthly average≤ 4 mg/Lall year
Phosphorus, Total As Pmonthly average≤ .3 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 11 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 140 kg/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 210 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
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamaximum≤ 1.61 tox chronicall year

How strict are these limits?

Cited limits by parameter: Virginia'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/VA0075191 · MCP: https://passage-data.com/mcp