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US Federal Emergency Managemen

Federal facility (Sewerage Systems), Loudoun County, Virginia. NPDES permit VA0024759, in force until Mar 31, 2030. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (17 values), form Q1 quarterly (4 values), form S1 twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
0 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
March 2026BOD, 5-day, 20 deg. C, weekly average18≤ 15 mg/L20%

Limits in force (28)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 3.4 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 5.1 kg/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 5 mg/Lall year
Solids, total suspendedweekly average≤ 7.5 mg/Lall year
Solids, total suspendedmonthly average≤ 1.7 kg/dall year
Solids, total suspendedweekly average≤ 2.6 kg/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 1.6 mg/Lall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]maximumreport only (mg/L)all year
Copper, total recoverablemaximumreport only (ug/L)all year
Toluenemaximumreport only (ug/L)all year
Benzenemaximumreport only (ug/L)all year
Ethylbenzenemaximumreport only (ug/L)all year
Naphthalenemaximumreport only (ug/L)all year
Petrol hydrocarbons, total recoverablemaximum≤ 15 mg/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ .09 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD) (alert, not enforceable)all year
E. coligeometric mean≤ 126 #/100mLall year
Xylene [mix of m+o+p]maximumreport only (ug/L)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/VA0024759 · MCP: https://passage-data.com/mcp