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Clarke County Sanitary Authority

Sewage treatment plant, Boyce, Virginia. NPDES permit VA0085171, in force until Sep 30, 2030. Last 12 months: over a limit 4 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (18 values), form A1 yearly, form S1 twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 13 reports late

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

Period endingParameterReportedLimitOver by
October 2025Chloride [as Cl], monthly average564≤ 420 mg/L34%
October 2025Chloride [as Cl], maximum weekly average564≤ 420 mg/L34%
October 2025Nitrogen, ammonia total [as N], maximum weekly average2.9≤ 2.2 mg/L32%
June 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average12≤ 8 mg/L50%

Limits in force (30)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 7.3 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 22 mg/Lall year
Solids, total suspendedmonthly average≤ 5.6 kg/dall year
Solids, total suspendedmaximum weekly average≤ 8.2 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 4.2 mg/LJan–May
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun–Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 6.2 mg/LJan–May
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.2 mg/LJun–Dec
Chloride [as Cl]monthly average≤ 420 mg/Lall year
Chloride [as Cl]maximum weekly average≤ 420 mg/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ .099 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
E. coligeometric mean≤ 63 #/100mLall year
Nitrogen, Total As Nmonthly average≤ 4 mg/Lall year
Phosphorus, Total As Pmonthly average≤ .3 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6 mg/LJun–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 18 mg/LJan–May
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 8 mg/LJun–Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 27 mg/LJan–May
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2 kg/dJun–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6.7 kg/dJan–May
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 3 kg/dJun–Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10 kg/dJan–May
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/VA0085171 · MCP: https://passage-data.com/mcp