Frederick-Winchester Service Authority

NPDES permit VA0075191 · Major POTW · effective, expires 2027-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

3values over a limit
0required values missing, on 0 form(s)
1of 16 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (2), TU Static Renewal 7-Day Chronic Ceriodaphnia dubia (1).

Reporting

Reports are due about 10 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (27)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 7.1 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9.5 SU all year
001Solids, total suspendedMO AVG <= 12 mg/L all year
001Solids, total suspendedMX WK AV <= 18 mg/L all year
001Solids, total suspendedMO AVG <= 230 kg/d all year
001Solids, total suspendedMX WK AV <= 340 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, May, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .57 mg/L Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 1.3 mg/L Jan, Feb, Mar, Apr, May, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= .72 mg/L Jun, Jul, Aug, Sep, Oct, Nov
001Chloride [as Cl]MO AVG report only all year
001Chloride [as Cl]MX WK AV report only all year
001Flow, in conduit or thru treatment plantMO AVG <= 5 MGD (alert) all year
001Flow, in conduit or thru treatment plantDAILY MX report only (alert) all year
001E. coliGEO MEAN <= 126 #/100mL all year
001Nitrogen, Total As NMO AVG <= 4 mg/L all year
001Phosphorus, Total As PMO AVG <= .3 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 7 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 11 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 140 kg/d all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 210 kg/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMAXIMUM <= 1.61 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