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Williamsburg Department Public Works & Utilities

Water Supply, Williamsburg, Virginia. NPDES permit VA0056537, in force until Jul 31, 2030. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (8 values), form Q1 quarterly, form S1 twice a year, form S2 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

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

Period endingParameterReportedLimitOver by
July 2026Chlorine, total residual, maximum.1≤ .011 mg/L809%

Limits in force (13)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 60 mg/Lall year
Carbon, dissolved organic [as C]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Aluminum, total recoverablemonthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmaximum≤ .011 mg/Lall year
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamaximum≤ 1.45 tox chronicall year
TU Static Renewal 7-Day Chronic Pimphales promelasmaximum≤ 1.45 tox chronicall year

How strict are these limits?

Cited limits by parameter: Virginia's rules and the federal ones.

Same industry: the 24 Water Supply permits in Virginia.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0056537 · MCP: https://passage-data.com/mcp