Passage Data · Check a report · Use it from your AI

Louisa County Water Authority

Sewerage Systems, Mineral, Virginia. NPDES permit VA0072079, in force until Apr 30, 2028. Last 12 months: over a limit 12 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (18 values), form A1 yearly
Renewal application due
Nov 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimitOver by
November 2025Nitrogen, ammonia total [as N], monthly average5.76≤ 4.1 mg/L40%
November 2025Nitrogen, ammonia total [as N], weekly average5.76≤ 4.1 mg/L40%
March 2026Solids, total suspended, monthly average68.9≤ 30 mg/L130%
March 2026Solids, total suspended, weekly average68.9≤ 45 mg/L53%
April 2026E. coli, monthly geometric mean> 49≤ 126 #/100mL—
June 2026E. coli, monthly geometric mean> 49≤ 126 #/100mL—
August 2026BOD, 5-day, 20 deg. C, monthly average43≤ 30 mg/L43%
August 2026E. coli, monthly geometric mean170≤ 126 #/100mL35%
August 2026Nitrogen, ammonia total [as N], monthly average29.5≤ 4.1 mg/L620%
August 2026Nitrogen, ammonia total [as N], weekly average29.5≤ 4.1 mg/L620%
August 2026Solids, total suspended, monthly average52≤ 30 mg/L73%
August 2026Solids, total suspended, weekly average52≤ 45 mg/L16%

Limits in force (26)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 2.5 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 3.4 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all 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≤ 2.5 kg/dall year
Solids, total suspendedweekly average≤ 3.4 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 average≤ 4.1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 4.1 mg/Lall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .02 MGD (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .008 mg/Lall year
Chlorine, total residualweekly average≤ .01 mg/Lall year
Chlorine, total residualinstantaneous minimum≥ .6 mg/Lall year
BOD, percent removal [total]minimum≥ 85 %all year
E. colimonthly geometric mean≤ 126 #/100mLall year
Solids, suspended percent removalminimum≥ 77 %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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0072079 · MCP: https://passage-data.com/mcp