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Fauquier County Water and Sanitation Authority

Sewage treatment plant, Marshall, Virginia. NPDES permit VA0031763, in force until Aug 31, 2028. 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 (14 values), form S1 twice a year
Renewal application due
Mar 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 14 reports late

Limits in force (20)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 18 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 27 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 44 kg/dall year
BOD, 5-day, 20 deg. Cmaximum 7-day geometric mean≤ 65 kg/dall year
BOD, 5-day, 20 deg. Caveragereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 18 mg/Lall year
Solids, total suspendedweekly average≤ 27 mg/Lall year
Solids, total suspendedmonthly average≤ 44 kg/dall year
Solids, total suspendedmaximum 7-day geometric mean≤ 65 kg/dall year
Solids, total suspendedaveragereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]weekly average≤ 2.2 mg/LJan, Feb, Mar, Apr, May, Dec
Flow, in conduit or thru treatment plantmonthly average≤ .64 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD) (alert, not enforceable)all year
BOD, percent removal [total]monthly average minimum≥ 85 %all year
E. colimonthly average≤ 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/VA0031763 · MCP: https://passage-data.com/mcp