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Stonebrook Management, LLC

Sewerage Systems, Winchester, Virginia. NPDES permit VA0088722, in force until Oct 31, 2029. Last 12 months: over a limit 3 times (last June 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (15 values), form A1 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
4 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
May 2026Chlorine, total residual, maximum weekly average.37≤ .33 mg/L12%
June 2026Chlorine, total residual, monthly average.56≤ .27 mg/L107%
June 2026Chlorine, total residual, maximum weekly average.56≤ .33 mg/L70%

Limits in force (20)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ .45 kg/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ .68 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ .45 kg/dall year
Solids, total suspendedmaximum weekly average≤ .68 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .004 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .27 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .33 mg/Lall year
Chlorine, total residualinstantaneous minimum≥ .6 mg/Lall year
BOD, percent removal [total]monthly average minimum≥ 85 %all year
E. coligeometric mean≤ 126 #/100mLall 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.

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/VA0088722 · MCP: https://passage-data.com/mcp