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Clarksville Town

Sewage treatment plant, Clarksville, Virginia. NPDES permit VA0020168, in force until Feb 28, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (16 values), form S1 twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (20)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 29 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 43 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 59.5 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 89 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≤ 29 mg/Lall year
Solids, total suspendedweekly average≤ 43 mg/Lall year
Solids, total suspendedmonthly average≤ 59.5 kg/dall year
Solids, total suspendedweekly average≤ 89 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LApr–Nov
Nitrogen, ammonia total [as N]weekly average≤ 12 mg/LApr–Nov
Flow, in conduit or thru treatment plantmonthly average≤ .55 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD) (alert, not enforceable)all year
BOD, percent removal [total]monthly average minimum≥ 85 %all year
E. colimonthly average≤ 126 #/100mLall 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/VA0020168 · MCP: https://passage-data.com/mcp