CITY OF LAKE MILLS

NPDES permit IA0027448 · Minor POTW · effective, expires 2027-05-31 · 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

28values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (16), Oxygen, dissolved [DO] (7), pH (4).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (140)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001pH30DA AVG report only all year
001pHDAILY MX report only all year
001Solids, total suspended30DA AVG <= 80 mg/L all year
001Solids, total suspended7 DA AVG <= 120 mg/L all year
001Solids, total suspended30DA AVG <= 500 lb/d all year
001Solids, total suspended7 DA AVG <= 751 lb/d all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Nitrogen, total [as N]30DA AVG <= 153.7 lb/d all year
001Nitrogen, total [as N]DAILY MX <= 251.6 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 4 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 2.3 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 1.6 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 1.5 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 2.5 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1.7 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 1.3 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 4.7 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 19.9 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 24.7 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 14.5 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 6.3 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 9.7 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 6 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 9.5 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 21.3 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 15.5 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 10.9 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 8.2 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 6.6 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 21.3 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 52.6 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 16.6 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 20 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 16.6 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 16.6 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 29.5 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 24.3 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 24.3 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 20 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 20 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 16.6 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 124.4 lb/d Jan
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Cyanide, total [as CN]30DA AVG <= .0052 mg/L all year
001Cyanide, total [as CN]DAILY MX <= .022 mg/L all year
001Cyanide, total [as CN]30DA AVG <= .03253 lb/d all year
001Cyanide, total [as CN]DAILY MX <= .1376 lb/d all year
001Chromium, hexavalent [as Cr]30DA AVG <= .01143 mg/L all year
001Chromium, hexavalent [as Cr]DAILY MX <= .01629 mg/L all year
001Chromium, hexavalent [as Cr]30DA AVG <= .07152 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= .1019 lb/d all year
001Copper, total [as Cu]30DA AVG <= .01687 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0269 mg/L all year
001Copper, total [as Cu]30DA AVG <= .1055 lb/d all year
001Copper, total [as Cu]DAILY MX <= .1683 lb/d all year
001Silver, total [as Ag]30DA AVG <= .01247 mg/L all year
001Silver, total [as Ag]DAILY MX <= .01247 mg/L all year
001Silver, total [as Ag]30DA AVG <= .07798 lb/d all year
001Silver, total [as Ag]DAILY MX <= .07798 lb/d all year
001E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Oct
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jun
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jul
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Feb
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Sep
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Aug
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L May
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jan
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Mar
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jun
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jul
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Feb
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Sep
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Aug
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L May
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Jan
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L Mar
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Apr
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Oct
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Jun
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Nov
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Jul
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Feb
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Sep
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Aug
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d May
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Jan
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 156 lb/d Mar
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Apr
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Jun
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Nov
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Jul
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Feb
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Sep
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Aug
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d May
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Jan
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 250 lb/d Mar

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