Chatham Town - Sewage Treatmen

NPDES permit VA0020524 · Minor POTW · effective, expires 2029-03-31 · 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

1values over a limit
0required values missing, on 0 form(s)
1of 13 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 (read off this permit's own late-day counts in EPA's filings).

Limits in force (26)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 7 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 77.8 kg/d all year
001Solids, total suspendedWKLY AVG <= 116.7 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 6.3 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 20 mg/L all year
001Nitrogen, Kjeldahl, total [as N]MO AVG <= 15 mg/L all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG <= 22.5 mg/L all year
001Nitrogen, Kjeldahl, total [as N]MO AVG <= 38.9 kg/d all year
001Nitrogen, Kjeldahl, total [as N]WKLY AVG <= 58.3 kg/d all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]WKLY AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG <= .685 MGD (alert) all year
001Flow, in conduit or thru treatment plantWKLY AVG report only (alert) all year
001E. coliGEO MEAN <= 126 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 37.5 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 64.8 kg/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 97.2 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

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