Warrenton Town

NPDES permit VA0021172 · Major POTW · effective, expires 2027-08-31 · 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

2values 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: BOD, 5-day, 20 deg. C (1), Nitrogen, 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 (29)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6.5 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 95 kg/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 140 kg/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 10 mg/L all year
001Solids, total suspendedWKLY AVG <= 15 mg/L all year
001Solids, total suspendedMO AVG <= 95 kg/d all year
001Solids, total suspendedWKLY AVG <= 140 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.4 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 1.7 mg/L all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG <= 2.5 MGD (alert) all year
001Flow, in conduit or thru treatment plantDAILY MX report only (alert) all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001E. coliMO AVG <= 126 #/100mL all year
001Nitrogen, Total As NROLL AVG <= 4 mg/L Dec
001Phosphorus, Total As PROLL AVG <= .3 mg/L Dec
001Solids, suspended percent removalMO AV MN >= 85 % all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMAXIMUM report only all year
001TU Static Renewal 7-Day Chronic Pimphales promelasMAXIMUM report only 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