CITY OF LAKE MILLS

NPDES permit WI0031194 · Major POTW · expired, expires 2021-09-30 · 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 2021-09-30 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

0values over a limit
6required values missing, on 3 form(s)
15of 24 forms filed late

Last period with anything received: 2026-06-30.

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 (83)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 14 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 14 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CDAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG report only May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 80.9 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 113 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedWKLY AVG <= 14 mg/L Jan, Mar, Dec
001Solids, total suspendedWKLY AVG <= 14 mg/L Apr, Nov
001Solids, total suspendedWKLY AVG <= 14 mg/L Feb
001Solids, total suspendedWKLY AVG <= 10 mg/L May, Jul, Aug, Oct
001Solids, total suspendedWKLY AVG <= 10 mg/L Jun, Sep
001Solids, total suspendedMO AVG <= 14 mg/L Jan, Mar, Dec
001Solids, total suspendedMO AVG <= 14 mg/L Apr, Nov
001Solids, total suspendedMO AVG <= 14 mg/L Feb
001Solids, total suspendedMO AVG <= 10 mg/L May, Jul, Aug, Oct
001Solids, total suspendedMO AVG <= 10 mg/L Jun, Sep
001Solids, total suspendedDAILY MX report only Jan, Mar, Dec
001Solids, total suspendedDAILY MX report only Apr, Nov
001Solids, total suspendedDAILY MX report only Feb
001Solids, total suspendedDAILY MX report only May, Jul, Aug, Oct
001Solids, total suspendedDAILY MX report only Jun, Sep
001Solids, total suspendedMO AVG <= 83.9 lb/d Jan, Mar, Dec
001Solids, total suspendedMO AVG <= 84 lb/d Apr, Nov
001Solids, total suspendedMO AVG <= 92.1 lb/d Feb
001Solids, total suspendedMO AVG <= 83.9 lb/d May, Jul, Aug, Oct
001Solids, total suspendedMO AVG <= 84 lb/d Jun, Sep
001Solids, total suspendedWKLY AVG <= 113 lb/d Jan, Mar, Dec
001Solids, total suspendedWKLY AVG <= 113 lb/d Apr, Nov
001Solids, total suspendedWKLY AVG <= 113 lb/d Feb
001Solids, total suspendedWKLY AVG <= 80.9 lb/d May, Jul, Aug, Oct
001Solids, total suspendedWKLY AVG <= 80.9 lb/d Jun, Sep
001Nitrogen, total [as N]QB report only all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 4.3 mg/L May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]WKLY AVG <= 12 mg/L Apr
001Nitrogen, ammonia total [as N]WKLY AVG <= 11 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 11 mg/L Oct
001Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 4.6 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7.5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 6.8 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L Oct
001Nitrogen, Kjeldahl, total [as N]QB report only all year
001Nitrite + Nitrate total [as N]QB report only all year
001Phosphorus, total [as P]MO AVG <= 1 mg/L Aug, Nov
001Phosphorus, total [as P]MO AVG <= 1 mg/L Dec
001Phosphorus, total [as P]MO AVG <= 1 mg/L Jan, Jul, Oct
001Phosphorus, total [as P]MO AVG <= 1 mg/L Feb
001Phosphorus, total [as P]MO AVG <= 1 mg/L Mar
001Phosphorus, total [as P]MO AVG <= 1 mg/L Apr
001Phosphorus, total [as P]MO AVG <= 1 mg/L May
001Phosphorus, total [as P]MO AVG <= 1 mg/L Jun
001Phosphorus, total [as P]MO AVG <= 1 mg/L Sep
001Phosphorus, total [as P]DAILY MX report only Jun
001Phosphorus, total [as P]MO AVG <= 21.5 lb/d Aug, Nov
001Phosphorus, total [as P]MO AVG <= 19.6 lb/d Dec
001Phosphorus, total [as P]MO AVG <= 22 lb/d Jan, Jul, Oct
001Phosphorus, total [as P]MO AVG <= 28.6 lb/d Feb
001Phosphorus, total [as P]MO AVG <= 25.2 lb/d Mar
001Phosphorus, total [as P]MO AVG <= 26 lb/d Apr
001Phosphorus, total [as P]MO AVG <= 26.1 lb/d May
001Phosphorus, total [as P]MO AVG <= 27.9 lb/d Jun
001Phosphorus, total [as P]MO AVG <= 22.7 lb/d Sep
001Phosphorus, total [as P]DAILY MX report only Jun
001Chlorine, total residualWKLY AVG <= 14 ug/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualMO AVG <= 14 ug/L May, Jun, Jul, Aug, Sep
001Chlorine, total residualDAILY MX <= 38 ug/L May, Jun, Jul, Aug, Sep
001Coliform, fecal generalWKLY AVG <= 780 #/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

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