CITY OF OTTUMWA

NPDES permit IA0058611 · Major POTW · effective, expires 2031-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

1values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, total suspended (1).

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 (146)

OutfallParameterStatisticLimitMonths
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 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 <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 2502 lb/d all year
001Solids, total suspended7 DA AVG <= 3753 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 report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG <= 21.4 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 42.3 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 62.8 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 17.5 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 115.2 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 62.6 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 28.1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 101.3 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 84.6 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 94.7 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 57.9 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 45.1 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 69.7 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 84.4 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 83 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 75.3 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 255.8 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 138.6 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 92.2 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 162.9 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 235.6 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 180.2 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 111.8 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 141.5 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 1625 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 3174 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 4690 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1336 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 8610 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 4693 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 2116 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 7557 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 6338 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 7093 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 4328 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 3396 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 5404 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 6501 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 6330 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5684 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 19224 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 10448 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 6857 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 12253 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 17778 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 13607 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 8533 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 10714 lb/d Jul
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
001E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 N=0;Y=1 all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1 N=0;Y=1 all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 2085 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 3336 lb/d all year
001Report due [yrmoda]DAILY MX <= 1 N=0;Y=1 all year
017pHDAILY MN >= 6 SU all year
017pHDAILY MX <= 9 SU all year
017Solids, total suspended30DA AVG <= 30 mg/L all year
017Solids, total suspended7 DA AVG <= 45 mg/L all year
017Solids, total suspended30DA AVG <= 2502 lb/d all year
017Solids, total suspended7 DA AVG <= 3753 lb/d all year
017Nitrogen, ammonia total [as N]30DA AVG <= 55.2 mg/L Nov
017Nitrogen, ammonia total [as N]30DA AVG <= 75.3 mg/L Jan
017Nitrogen, ammonia total [as N]30DA AVG <= 158.8 mg/L Mar
017Nitrogen, ammonia total [as N]30DA AVG <= 23 mg/L Sep
017Nitrogen, ammonia total [as N]30DA AVG <= 82.2 mg/L Dec
017Nitrogen, ammonia total [as N]30DA AVG <= 191.3 mg/L May
017Nitrogen, ammonia total [as N]30DA AVG <= 27.9 mg/L Oct
017Nitrogen, ammonia total [as N]30DA AVG <= 151.8 mg/L Apr
017Nitrogen, ammonia total [as N]30DA AVG <= 70.4 mg/L Jul
017Nitrogen, ammonia total [as N]30DA AVG <= 37 mg/L Aug
017Nitrogen, ammonia total [as N]30DA AVG <= 83.8 mg/L Feb
017Nitrogen, ammonia total [as N]30DA AVG <= 141.4 mg/L Jun
017Nitrogen, ammonia total [as N]DAILY MX <= 107.5 mg/L Nov
017Nitrogen, ammonia total [as N]DAILY MX <= 149.6 mg/L Jan
017Nitrogen, ammonia total [as N]DAILY MX <= 225.9 mg/L Mar
017Nitrogen, ammonia total [as N]DAILY MX <= 84.9 mg/L Sep
017Nitrogen, ammonia total [as N]DAILY MX <= 104.1 mg/L Dec
017Nitrogen, ammonia total [as N]DAILY MX <= 376.5 mg/L May
017Nitrogen, ammonia total [as N]DAILY MX <= 85.7 mg/L Oct
017Nitrogen, ammonia total [as N]DAILY MX <= 258.7 mg/L Apr
017Nitrogen, ammonia total [as N]DAILY MX <= 197 mg/L Jul
017Nitrogen, ammonia total [as N]DAILY MX <= 108.2 mg/L Aug
017Nitrogen, ammonia total [as N]DAILY MX <= 188.2 mg/L Feb
017Nitrogen, ammonia total [as N]DAILY MX <= 350.4 mg/L Jun
017Nitrogen, ammonia total [as N]30DA AVG <= 4126 lb/d Nov
017Nitrogen, ammonia total [as N]30DA AVG <= 5612 lb/d Jan
017Nitrogen, ammonia total [as N]30DA AVG <= 11801 lb/d Mar
017Nitrogen, ammonia total [as N]30DA AVG <= 1745 lb/d Sep
017Nitrogen, ammonia total [as N]30DA AVG <= 6119 lb/d Dec
017Nitrogen, ammonia total [as N]30DA AVG <= 14227 lb/d May
017Nitrogen, ammonia total [as N]30DA AVG <= 2110 lb/d Oct
017Nitrogen, ammonia total [as N]30DA AVG <= 11315 lb/d Apr
017Nitrogen, ammonia total [as N]30DA AVG <= 5268 lb/d Jul
017Nitrogen, ammonia total [as N]30DA AVG <= 2777 lb/d Aug
017Nitrogen, ammonia total [as N]30DA AVG <= 6241 lb/d Feb
017Nitrogen, ammonia total [as N]30DA AVG <= 10539 lb/d Jun
017Nitrogen, ammonia total [as N]DAILY MX <= 8213 lb/d Nov
017Nitrogen, ammonia total [as N]DAILY MX <= 11327 lb/d Jan
017Nitrogen, ammonia total [as N]DAILY MX <= 16903 lb/d Mar
017Nitrogen, ammonia total [as N]DAILY MX <= 6393 lb/d Sep
017Nitrogen, ammonia total [as N]DAILY MX <= 7892 lb/d Dec
017Nitrogen, ammonia total [as N]DAILY MX <= 28143 lb/d May
017Nitrogen, ammonia total [as N]DAILY MX <= 6388 lb/d Oct
017Nitrogen, ammonia total [as N]DAILY MX <= 19405 lb/d Apr
017Nitrogen, ammonia total [as N]DAILY MX <= 14666 lb/d Jul
017Nitrogen, ammonia total [as N]DAILY MX <= 8038 lb/d Aug
017Nitrogen, ammonia total [as N]DAILY MX <= 14075 lb/d Feb
017Nitrogen, ammonia total [as N]DAILY MX <= 26260 lb/d Jun
017E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
017Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 N=0;Y=1 all year
017Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1 N=0;Y=1 all year
017BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
017BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
017BOD, carbonaceous [5 day, 20 C]30DA AVG <= 2085 lb/d all year
017BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 3336 lb/d all year
017Report due [yrmoda]DAILY MX <= 1 N=0;Y=1 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