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Rapidan Service Authority

Sewage treatment plant, major discharger, Locust Grove, Virginia. NPDES permit VA0083411, in force until Sep 30, 2027. 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 (24 values), form Q1 quarterly (4 values), form A1 yearly
Renewal application due
Apr 3, 2027 · 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 17 reports late

Limits in force (48)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6.5 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, May, Dec
Solids, total suspendedmonthly average≤ 8 mg/LJun–Nov
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Dec
Solids, total suspendedweekly average≤ 12 mg/LJun–Nov
Solids, total suspendedmonthly average≤ 150 kg/dJan, Feb, Mar, Apr, May, Dec
Solids, total suspendedmonthly average≤ 61 kg/dJun–Nov
Solids, total suspendedweekly average≤ 230 kg/dJan, Feb, Mar, Apr, May, Dec
Solids, total suspendedweekly average≤ 91 kg/dJun–Nov
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly average≤ 3 mg/LJun–Nov
Nitrogen, Kjeldahl, total [as N]monthly average≤ 7 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, Kjeldahl, total [as N]weekly average≤ 4.5 mg/LJun–Nov
Nitrogen, Kjeldahl, total [as N]weekly average≤ 10 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, Kjeldahl, total [as N]monthly average≤ 23 kg/dJun–Nov
Nitrogen, Kjeldahl, total [as N]monthly average≤ 53 kg/dJan, Feb, Mar, Apr, May, Dec
Nitrogen, Kjeldahl, total [as N]weekly average≤ 34 kg/dJun–Nov
Nitrogen, Kjeldahl, total [as N]weekly average≤ 76 kg/dJan, Feb, Mar, Apr, May, Dec
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]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]maximumreport only (mg/L)all year
Zinc, total recoverablemonthly average≤ 65 ug/Lall year
Zinc, total recoverableweekly average≤ 65 ug/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ 2 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .009 mg/Lall year
Chlorine, total residualweekly average≤ .01 mg/Lall year
Chlorine, total residualminimum≥ .6 mg/Lall year
E. coligeometric mean≤ 126 #/100mLall year
Nitrogen, Total As Nannual average≤ 3 mg/Lall year
Phosphorus, Total As Pannual average≤ .3 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8 mg/LJun–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 12 mg/LJun–Nov
BOD, carbonaceous [5 day, 20 C]weekly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 61 kg/dJun–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 150 kg/dJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 91 kg/dJun–Nov
BOD, carbonaceous [5 day, 20 C]weekly average≤ 230 kg/dJan, Feb, Mar, Apr, May, Dec
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 dubiamaximumreport only (tox chronic)all year
TU Static Renewal 7-Day Chronic Pimphales promelasmaximumreport only (tox chronic)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/VA0083411 · MCP: https://passage-data.com/mcp