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Dinwiddie County Water Authority

Sewage treatment plant, Dinwiddie, Virginia. NPDES permit VA0081779, in force until Feb 28, 2030. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (18 values), form Q1 quarterly (2 values), form S1 twice a year, form T1 every 2 months
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 20 reports late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, Kjeldahl, total [as N], weekly average11.9≤ 4.5 mg/L164%

Limits in force (28)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 7.5 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 11 kg/dall year
Solids, total suspendedweekly average≤ 17 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly average≤ 3 mg/Lall year
Nitrogen, Kjeldahl, total [as N]weekly average≤ 4.5 mg/Lall year
Nitrogen, Kjeldahl, total [as N]monthly average≤ 11 kg/dall year
Nitrogen, Kjeldahl, total [as N]weekly average≤ 17 kg/dall year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]weekly averagereport only (mg/L)all year
Zinc, total recoverablemonthly average≤ 84 ug/Lall year
Zinc, total recoverableweekly average≤ 84 ug/Lall year
Flow, in conduit or thru treatment plantdaily average≤ .1 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
E. colimonthly geometric mean≤ 126 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 9 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2.3 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 3.4 kg/dall year
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.

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/VA0081779 · MCP: https://passage-data.com/mcp