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Rapidan Service Authority

Sewage treatment plant, Madison, Virginia. NPDES permit VA0022845, in force until Oct 31, 2030. 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 (19 values), form A1 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 17 reports late

Limits in force (25)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 7 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum 7-day geometric mean≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 9.1 kg/dall year
BOD, 5-day, 20 deg. Cmaximum 7-day geometric mean≤ 14 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum 7-day geometric mean≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 9.1 kg/dall year
Solids, total suspendedmaximum 7-day geometric mean≤ 14 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJun–Nov
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]weekly average≤ 1.7 mg/LJun–Nov
Nitrogen, ammonia total [as N]maximum 7-day geometric mean≤ 22 mg/LJan, Feb, Mar, Apr, May, Dec
Flow, in conduit or thru treatment plantmonthly average≤ .08 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .008 mg/Lall year
Chlorine, total residualweekly average≤ .01 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0022845 · MCP: https://passage-data.com/mcp