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Nelson County Service Authority

Sewage treatment plant, Piney River, Virginia. NPDES permit VA0089729, in force until May 31, 2028. Last 12 months: over a limit 17 times (last August 2026), 4 required values missing, 1 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (19 values), form Q1 quarterly (1 value), form A1 yearly, form S1 twice a year
Renewal application due
Dec 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
32 values over a limit, 0 required values missing, 3 of 19 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 17 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average1.93≤ .44 mg/L339%
October 2025Nitrogen, ammonia total [as N], weekly average3.28≤ .59 mg/L456%
November 2025Solids, total suspended, monthly average33≤ 30 mg/L10%
December 2025Solids, suspended percent removal, monthly average minimum78.6≥ 85 %43%
December 2025pH, minimum2.32≥ 6 SU—
February 2026Nitrogen, ammonia total [as N], monthly average2.83≤ 1.8 mg/L57%
February 2026Nitrogen, ammonia total [as N], maximum weekly average8.1≤ 2.5 mg/L224%
July 2026BOD, carbonaceous [5 day, 20 C], monthly average9.64≤ 7 mg/L38%
July 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average18.2≤ 10 mg/L82%
July 2026Nitrogen, ammonia total [as N], monthly average4.14≤ .44 mg/L841%
July 2026Nitrogen, ammonia total [as N], weekly average10.1≤ .59 mg/L1612%
July 2026Oxygen, dissolved [DO], instantaneous minimum6.9≥ 7 mg/L1%
July 2026Solids, total suspended, monthly average44≤ 30 mg/L47%
July 2026pH, maximum9.27≤ 9 SU—
August 2026Nitrogen, ammonia total [as N], monthly average1.83≤ .44 mg/L316%
August 2026Nitrogen, ammonia total [as N], weekly average7.03≤ .59 mg/L1092%
August 2026Oxygen, dissolved [DO], instantaneous minimum6.8≥ 7 mg/L3%

Limits in force (31)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 25 kg/dall year
Solids, total suspendedweekly average≤ 37 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]monthly average≤ .44 mg/LJun–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.5 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]weekly average≤ .59 mg/LJun–Nov
Hardness, total [as CaCO3]minimum≥ 100 mg/Lall year
Copper, total recoverablemaximum weekly averagereport only (ug/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .22 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≤ .011 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .012 mg/Lall year
Chlorine, total residualinstantaneous minimum≥ .6 mg/Lall year
E. coligeometric mean≤ 126 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7 mg/LJun–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10 mg/LJun–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 21 kg/dJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 kg/dJun–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 33 kg/dJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 8.3 kg/dJun–Nov
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

New limits from May 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Copper, total recoverable, maximum weekly average15 ug/Lnew19.6 ug/L (3 values)1.31×
Copper, total recoverable, monthly average15 ug/Lnew——

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/VA0089729 · MCP: https://passage-data.com/mcp