Frederick-Winchester Service Authority

NPDES permit VA0065552 · Major POTW · effective, expires 2031-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (1).

Reporting

Reports are due about 10 days after each monitoring period ends (the most common figure among VA permits in EPA's filings — check your permit).

Limits in force (28)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 7.1 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 7 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 10 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 207 kg/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 480 kg/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 29 mg/L all year
001Solids, total suspendedMX WK AV <= 44 mg/L all year
001Solids, total suspendedMO AVG <= 1400 kg/d all year
001Solids, total suspendedMX WK AV <= 2100 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.2 mg/L all year
001Nitrogen, ammonia total [as N]MX WK AV <= 1.4 mg/L all year
001Chloride [as Cl]MO AVG <= 415 mg/L all year
001Chloride [as Cl]MX WK AV <= 415 mg/L all year
001Flow, in conduit or thru treatment plantMO AVG <= 12.6 MGD (alert) all year
001Flow, in conduit or thru treatment plantDAILY MX report only (alert) all year
001Chlorine, total residualMO AVG <= .0087 mg/L all year
001Chlorine, total residualMX WK AV <= .0092 mg/L all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001E. coliGEO MEAN <= 122 #/100mL all year
001Nitrogen, Total As NANNL AVG <= 3 mg/L all year
001Phosphorus, Total As PANNL AVG <= .3 mg/L all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMAXIMUM <= 1.82 tox chronic all year
001TU Static Renewal 7-Day Chronic Pimphales promelasMAXIMUM <= 1.82 tox chronic all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states