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Caroline County Public Utilities

Sewage treatment plant, major discharger, Ruther Glen, Virginia. NPDES permit VA0073504, in force until Apr 30, 2029. Last 12 months: over a limit 4 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (20 values), form Q1 quarterly (1 value), form A1 yearly, form Q2 quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 24 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimit
May 2026BOD, 5-day, 20 deg. C, monthly average> 1.22≤ 13 mg/L
May 2026BOD, 5-day, 20 deg. C, monthly average> 2.13≤ 74 kg/d
May 2026BOD, 5-day, 20 deg. C, weekly average> 3.08≤ 20 mg/L
May 2026BOD, 5-day, 20 deg. C, weekly average> 5.15≤ 114 kg/d

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 13 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 74 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 114 kg/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 13 mg/Lall year
Solids, total suspendedweekly average≤ 20 mg/Lall year
Solids, total suspendedmonthly average≤ 74 kg/dall year
Solids, total suspendedweekly average≤ 114 kg/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ .83 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 1.1 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
Chloride [as Cl]monthly averagereport only (mg/L)all year
Zinc, total recoverablemonthly average≤ 110 ug/Lall year
Zinc, total recoverablemonthly average≤ 110 ug/Lall year
Copper, total recoverablemonthly average≤ 20 ug/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ 1.5 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
E. colimonthly geometric mean≤ 126 #/100mLall year
Nitrogen, Total As Nannual average≤ 3 mg/Lall year
Phosphorus, Total As Pannual average≤ .2 mg/Lall year
Phosphorus, Total As Pannual average≤ .2 mg/Lall year
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamaximumreport only (tox chronic)all year
TU Static Renewal 7-Day Chronic Pimphales promelasmaximumreport only (tox chronic)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/VA0073504 · MCP: https://passage-data.com/mcp