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Des Moines Metropolitan Wra

Sewage treatment plant, major discharger, Des Moines, Iowa. NPDES permit IA0044130, in force until Feb 28, 2030. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (50 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (94)

ParameterStatisticLimitMonths
Streamflow30-day averagereport only (cfs)all year
Streamflowdaily maximumreport only (cfs)all year
Nitrogen, ammonia per cfs of streamflow30-day average≤ 12.4 lb/CFS/dMar
Nitrogen, ammonia per cfs of streamflow30-day average≤ 5.3 lb/CFS/dSep
Nitrogen, ammonia per cfs of streamflow30-day average≤ 12.4 lb/CFS/dOct
Nitrogen, ammonia per cfs of streamflow30-day average≤ 7.2 lb/CFS/dMay
Nitrogen, ammonia per cfs of streamflow30-day average≤ 5.8 lb/CFS/dJul
Nitrogen, ammonia per cfs of streamflow30-day average≤ 25.1 lb/CFS/dJan
Nitrogen, ammonia per cfs of streamflow30-day average≤ 18.6 lb/CFS/dDec
Nitrogen, ammonia per cfs of streamflow30-day average≤ 8.6 lb/CFS/dApr
Nitrogen, ammonia per cfs of streamflow30-day average≤ 15.7 lb/CFS/dNov
Nitrogen, ammonia per cfs of streamflow30-day average≤ 4.6 lb/CFS/dJun
Nitrogen, ammonia per cfs of streamflow30-day average≤ 28.6 lb/CFS/dFeb
Nitrogen, ammonia per cfs of streamflow30-day average≤ 5.3 lb/CFS/dAug
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 30.7 lb/CFS/dMar
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 30.1 lb/CFS/dSep
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 29.2 lb/CFS/dOct
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 26.4 lb/CFS/dMay
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 30.7 lb/CFS/dJul
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 34.5 lb/CFS/dJan
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 29.5 lb/CFS/dDec
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 27 lb/CFS/dApr
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 25.8 lb/CFS/dNov
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 25.5 lb/CFS/dJun
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 37.3 lb/CFS/dFeb
Nitrogen, ammonia per cfs of streamflowdaily maximum≤ 27.2 lb/CFS/dAug
Oxygen, dissolved [DO]daily minimum≥ 3 mg/Lall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pH30-day averagereport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 50040 lb/dall year
Solids, total suspended7-day average≤ 75060 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 58800 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 100678 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 44430 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 115139 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 30827 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 29292 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 27790 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 50807 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 68403 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 72701 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 38335 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 45668 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 281500 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 282987 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 271315 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 289919 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 177692 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 131202 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 121814 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 276472 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 271463 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 310893 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 191326 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 306658 lb/dOct
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]30-day averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]30-day averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Chlorine, total residual30-day average≤ .528 mg/Lall year
Chlorine, total residualdaily maximum≤ .622 mg/Lall year
Chlorine, total residual30-day average≤ 848 lb/dall year
Chlorine, total residualdaily maximum≤ 1023 lb/dall year
Chlorine, total residual30-day average≤ .514 mg/Lall year
Chlorine, total residualdaily maximum≤ .634 mg/Lall year
Chlorine, total residual30-day average≤ 574 lb/dall year
Chlorine, total residualdaily maximum≤ 708 lb/dall year
E. coligeometric mean≤ 126 #/100mLMar–Nov
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 41700 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 66720 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0044130 · MCP: https://passage-data.com/mcp