Fontana Walworth Water Pollution Cont. Comm

NPDES permit WI0036021 · Major POTW · expired, expires 2023-12-31 · 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.

This permit expired on 2023-12-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

7values over a limit
56required values missing, on 20 form(s)
8of 28 forms filed late

Last period with anything received: 2026-06-30. Most often over: Chloride [as Cl] (7).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (73)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 10 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 8.8 mg/L May
001BOD, 5-day, 20 deg. CWKLY AVG <= 7.3 mg/L Jun
001BOD, 5-day, 20 deg. CWKLY AVG <= 7.2 mg/L Jul, Aug
001BOD, 5-day, 20 deg. CWKLY AVG <= 7.9 mg/L Sep
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 8.8 mg/L May
001BOD, 5-day, 20 deg. CMO AVG <= 7.3 mg/L Jun
001BOD, 5-day, 20 deg. CMO AVG <= 7.2 mg/L Jul, Aug
001BOD, 5-day, 20 deg. CMO AVG <= 7.9 mg/L Sep
001BOD, 5-day, 20 deg. CDAILY MX report only Jun
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedWKLY AVG <= 10 mg/L all year
001Solids, total suspendedMO AVG <= 10 mg/L all year
001Solids, total suspendedDAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]QB report only all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 11 mg/L Jan, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 11 mg/L Feb, Mar, Nov
001Nitrogen, ammonia total [as N]WKLY AVG <= 6.9 mg/L Apr
001Nitrogen, ammonia total [as N]WKLY AVG <= 5.2 mg/L May
001Nitrogen, ammonia total [as N]WKLY AVG <= 4 mg/L Jun
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.4 mg/L Jul
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.5 mg/L Aug
001Nitrogen, ammonia total [as N]WKLY AVG <= 4.9 mg/L Sep
001Nitrogen, ammonia total [as N]WKLY AVG <= 9.7 mg/L Oct
001Nitrogen, ammonia total [as N]MO AVG <= 4.5 mg/L Jan, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 4.6 mg/L Feb, Mar, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 2.9 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 2.4 mg/L May
001Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Jun
001Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L Jul
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Aug
001Nitrogen, ammonia total [as N]MO AVG <= 2.3 mg/L Sep
001Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Jan, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Feb, Mar, Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 17 mg/L Oct
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]QB report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]QB report only all year
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Chloride [as Cl]WKLY AVG <= 560 mg/L all year
001Chloride [as Cl]MO AVG report only all year
001Chloride [as Cl]DAILY MX report only all year
001Chloride [as Cl]MO AVG report only all year
001Chloride [as Cl]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableQB report only all year
001Coliform, fecal generalWK GEOMN <= 656 #/100mL May, Jun, Jul, Aug, Sep
001Coliform, fecal generalGEO MEAN <= 400 #/100mL May, Jun, Jul, Aug, Sep
701BOD, 5-day, 20 deg. CMO AVG report only all year
701BOD, 5-day, 20 deg. CDAILY MX report only all year
701Solids, total suspendedMO AVG report only all year
701Solids, total suspendedDAILY MX report only all year
701Flow, in conduit or thru treatment plantMO AVG report only all year
701Flow, in conduit or thru treatment plantDAILY MX report only all year
701Mercury, total recoverableDAILY MX report only all year
701Mercury, total recoverableQB 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