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Louisa County Water Authority

Sewage treatment plant, Gordonsville, Virginia. NPDES permit VA0090743, in force until Oct 31, 2029. Last 12 months: over a limit 7 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (25 values), form A1 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 9 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, Kjeldahl, total [as N], monthly average13.71≤ 7.8 lb/d76%
February 2026Nitrogen, Kjeldahl, total [as N], monthly average8.06≤ 3 mg/L169%
February 2026Nitrogen, Kjeldahl, total [as N], weekly average11.26≤ 4.5 mg/L150%
February 2026Nitrogen, Kjeldahl, total [as N], weekly average19.08≤ 12 lb/d59%
March 2026Nitrogen, Kjeldahl, total [as N], monthly average3.83≤ 3 mg/L28%
March 2026Nitrogen, Kjeldahl, total [as N], weekly average12.92≤ 4.5 mg/L187%
March 2026Nitrogen, Kjeldahl, total [as N], weekly average20.75≤ 12 lb/d73%

Limits in force (34)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedweekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 12 kg/dall year
Solids, total suspendedweekly average≤ 18 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly 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≤ 7.8 lb/dall year
Nitrogen, Kjeldahl, total [as N]weekly average≤ 12 lb/dall year
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
Zinc, total recoverablemonthly averagereport only (ug/L)all year
Copper, total recoverablemonthly averagereport only (ug/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .311 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .009 mg/Lall year
Chlorine, total residualweekly average≤ .011 mg/Lall year
E. coligeometric mean≤ 126 #/100mLall year
Nitrogen, Total As Nannual average≤ 6 mg/Lall year
Phosphorus, Total As Pannual average≤ .6 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 18 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/VA0090743 · MCP: https://passage-data.com/mcp