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Halifax County Public Schools

Sewage treatment plant, Alton, Virginia. NPDES permit VA0091804, in force until Dec 31, 2030. Last 12 months: over a limit 2 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (22 values), form A1 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], monthly average3.7≤ 2 mg/L85%
February 2026Nitrogen, ammonia total [as N], maximum weekly average6.6≤ 2 mg/L230%

Limits in force (27)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 7 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 1.4 kg/dall year
Solids, total suspendedmaximum weekly average≤ 2 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 2 mg/Lall year
Nitrogen, Kjeldahl, total [as N]monthly average≤ 7 mg/Lall year
Nitrogen, Kjeldahl, total [as N]maximum weekly average≤ 10.5 mg/Lall year
Nitrogen, Kjeldahl, total [as N]monthly average≤ .3 kg/dall year
Nitrogen, Kjeldahl, total [as N]maximum weekly average≤ .5 kg/dall year
Flow, in conduit or thru treatment plantmonthly average≤ .012 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≤ 8 ug/Lall year
Chlorine, total residualmaximum weekly average≤ 9.8 ug/Lall year
Chlorine, total residualminimum≥ .6 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 18 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ .5 kg/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ .8 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0091804 · MCP: https://passage-data.com/mcp