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Nelson County Service Authority

Sewage treatment plant, Wintergreen, Virginia. NPDES permit VA0031011, in force until Dec 31, 2028. Last 12 months: over a limit 20 times (last July 2026), 2 of 12 reports late. 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
22 values over a limit, 0 required values missing, 3 of 13 reports late

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

All 20 values over a limit
Period endingParameterReportedLimitOver by
December 2025Hardness, total [as CaCO3], instantaneous minimum116≥ 120 mg/L3%
December 2025Nitrogen, ammonia total [as N], monthly average3.13≤ 1.9 mg/L65%
December 2025Nitrogen, ammonia total [as N], maximum weekly average6.04≤ 2.6 mg/L132%
December 2025Solids, total suspended, monthly average16.6≤ 11 kg/d51%
December 2025Solids, total suspended, monthly average43≤ 10 mg/L330%
December 2025Solids, total suspended, maximum weekly average43≤ 15 mg/L187%
December 2025pH, instantaneous minimum5.79≥ 6 SU—
January 2026Hardness, total [as CaCO3], instantaneous minimum112≥ 120 mg/L7%
January 2026Nitrogen, ammonia total [as N], monthly average28.6≤ 1.9 mg/L1405%
January 2026Nitrogen, ammonia total [as N], maximum weekly average38.5≤ 2.6 mg/L1381%
February 2026Hardness, total [as CaCO3], instantaneous minimum82.7≥ 120 mg/L31%
February 2026Nitrogen, ammonia total [as N], monthly average29.4≤ 1.9 mg/L1447%
February 2026Nitrogen, ammonia total [as N], maximum weekly average37.7≤ 2.6 mg/L1350%
March 2026Nitrogen, ammonia total [as N], monthly average2.27≤ 1.9 mg/L19%
March 2026Nitrogen, ammonia total [as N], maximum weekly average19.5≤ 2.6 mg/L650%
May 2026Nitrogen, ammonia total [as N], maximum weekly average2.7≤ 2.6 mg/L4%
June 2026Nitrogen, ammonia total [as N], monthly average1.22≤ .84 mg/L45%
June 2026Nitrogen, ammonia total [as N], maximum weekly average2.54≤ 1.1 mg/L131%
July 2026Nitrogen, ammonia total [as N], monthly average1.57≤ .84 mg/L87%
July 2026Nitrogen, ammonia total [as N], maximum weekly average4.7≤ 1.1 mg/L327%

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 7.2 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 11 kg/dall year
Solids, total suspendedmaximum weekly average≤ 17 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]monthly average≤ .84 mg/LJun–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.6 mg/LJan, Feb, Mar, Apr, May, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.1 mg/LJun–Nov
Hardness, total [as CaCO3]instantaneous minimum≥ 120 mg/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ .3 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .0075 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .0083 mg/Lall year
E. coligeometric mean≤ 126 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6 mg/LJun–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 18 mg/LJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 9 mg/LJun–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 14 kg/dJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 7 kg/dJun–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 20 kg/dJan, Feb, Mar, Apr, May, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10 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

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/VA0031011 · MCP: https://passage-data.com/mcp