Washington County Public Schools — NPDES permit VA0026778: limits, due date and EPA's record

Sewage treatment plant, Damascus, Virginia. NPDES permit VA0026778, in force until Oct 31, 2029. Last 12 months: over a limit once (last August 2026). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
August 2026	Chlorine, total residual, monthly average	.06	≤ .056 mg/L	7%

Limits in force (21)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	daily minimum	≥ 5.5 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 24 mg/L	all year
BOD, 5-day, 20 deg. C	weekly average	≤ 36 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ .7 kg/d	all year
BOD, 5-day, 20 deg. C	weekly average	≤ 1.1 kg/d	all year
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	weekly average	≤ 45 mg/L	all year
Solids, total suspended	monthly average	≤ .9 kg/d	all year
Solids, total suspended	weekly average	≤ 1.4 kg/d	all year
Nitrogen, ammonia total [as N]	monthly average	≤ 13 mg/L	Jun–Dec
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	Jan–May
Nitrogen, ammonia total [as N]	maximum	≤ 13 mg/L	Jun–Dec
Nitrogen, ammonia total [as N]	weekly average	report only (mg/L)	Jan–May
Flow, in conduit or thru treatment plant	monthly average	≤ .008 MGD (alert, not enforceable)	all year
Flow, in conduit or thru treatment plant	maximum	report only (MGD) (alert, not enforceable)	all year
Chlorine, total residual	monthly average	≤ .056 mg/L	all year
Chlorine, total residual	weekly average	≤ .07 mg/L	all year
Chlorine, total residual	instantaneous minimum	≥ .6 mg/L	all year
E. coli	geometric mean	≤ 126 #/100mL	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/VA0026778 · MCP: https://passage-data.com/mcp