DES MOINES METROPOLITAN WRA

NPDES permit IA0044130 · Major POTW · effective, expires 2030-02-28 · 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

0values over a limit
0required values missing, on 0 form(s)
1of 11 forms filed late

Last period with anything received: 2026-07-31.

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 (94)

OutfallParameterStatisticLimitMonths
001Streamflow30DA AVG report only all year
001StreamflowDAILY MX report only all year
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 12.4 lb/CFS/d Mar
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 5.3 lb/CFS/d Sep
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 12.4 lb/CFS/d Oct
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 7.2 lb/CFS/d May
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 5.8 lb/CFS/d Jul
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 25.1 lb/CFS/d Jan
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 18.6 lb/CFS/d Dec
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 8.6 lb/CFS/d Apr
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 15.7 lb/CFS/d Nov
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 4.6 lb/CFS/d Jun
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 28.6 lb/CFS/d Feb
001Nitrogen, ammonia per cfs of streamflow30DA AVG <= 5.3 lb/CFS/d Aug
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 30.7 lb/CFS/d Mar
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 30.1 lb/CFS/d Sep
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 29.2 lb/CFS/d Oct
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 26.4 lb/CFS/d May
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 30.7 lb/CFS/d Jul
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 34.5 lb/CFS/d Jan
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 29.5 lb/CFS/d Dec
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 27 lb/CFS/d Apr
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 25.8 lb/CFS/d Nov
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 25.5 lb/CFS/d Jun
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 37.3 lb/CFS/d Feb
001Nitrogen, ammonia per cfs of streamflowDAILY MX <= 27.2 lb/CFS/d Aug
001Oxygen, dissolved [DO]DAILY MN >= 3 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 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 <= 50040 lb/d all year
001Solids, total suspended7 DA AVG <= 75060 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 <= 58800 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 100678 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 44430 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 115139 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 30827 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 29292 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 27790 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 50807 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 68403 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 72701 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 38335 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 45668 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 281500 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 282987 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 271315 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 289919 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 177692 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 131202 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 121814 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 276472 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 271463 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 310893 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 191326 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 306658 lb/d Oct
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
001Chlorine, total residual30DA AVG <= .528 mg/L all year
001Chlorine, total residualDAILY MX <= .622 mg/L all year
001Chlorine, total residual30DA AVG <= 848 lb/d all year
001Chlorine, total residualDAILY MX <= 1023 lb/d all year
001Chlorine, total residual30DA AVG <= .514 mg/L all year
001Chlorine, total residualDAILY MX <= .634 mg/L all year
001Chlorine, total residual30DA AVG <= 574 lb/d all year
001Chlorine, total residualDAILY MX <= 708 lb/d 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 <= 41700 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 66720 lb/d 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