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Midamerican Energy Company

Electric Services, major discharger, Salix, Iowa. NPDES permit IA0061859, in force until Jan 31, 2029. Last 12 months: over a limit once (last July 2026), 6 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (2 values), outfall 004 form A monthly (10 values), outfall 005 form A monthly (6 values), outfall 007 form A monthly (2 values), outfall 008 form A monthly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 60 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimit
July 2026pH, daily maximum9.67≤ 9 SU

Limits in force (74)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheit30-day average≤ 105.1 deg FSep001
Temperature, water deg. fahrenheit30-day average≤ 68.7 deg FDec001
Temperature, water deg. fahrenheit30-day average≤ 105.1 deg FJul001
Temperature, water deg. fahrenheit30-day average≤ 66 deg FFeb001
Temperature, water deg. fahrenheit30-day average≤ 60.6 deg FJan001
Temperature, water deg. fahrenheit30-day average≤ 78.6 deg FNov001
Temperature, water deg. fahrenheit30-day average≤ 102 deg FJun001
Temperature, water deg. fahrenheit30-day average≤ 105.1 deg FAug001
Temperature, water deg. fahrenheit30-day average≤ 80.6 deg FMar001
Temperature, water deg. fahrenheit30-day average≤ 87.6 deg FApr001
Temperature, water deg. fahrenheit30-day average≤ 97.7 deg FMay001
Temperature, water deg. fahrenheit30-day average≤ 90.3 deg FOct001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FSep001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FDec001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FJul001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FFeb001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FJan001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FNov001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FJun001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FAug001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FMar001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FApr001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FMay001
Temperature, water deg. fahrenheitdaily maximum≤ 105.1 deg FOct001
pHdaily minimum≥ 6 SUall year004
pHdaily maximum≤ 9 SUall year004
Solids, total suspended30-day average≤ 30 mg/Lall year004
Solids, total suspendeddaily maximum≤ 100 mg/Lall year004
Solids, total suspended30-day averagereport only (mg/L)all year004
Solids, total suspendeddaily maximumreport only (mg/L)all year004
Oil & Grease30-day average≤ 15 mg/Lall year004
Oil & Greasedaily maximum≤ 20 mg/Lall year004
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year004
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year004
pHdaily minimum≥ 6 SUall year005
pHdaily maximum≤ 9 SUall year005
Solids, total suspended30-day average≤ 30 mg/Lall year005
Solids, total suspendeddaily maximum≤ 100 mg/Lall year005
Oil & Grease30-day average≤ 15 mg/Lall year005
Oil & Greasedaily maximum≤ 20 mg/Lall year005
Temperature, water deg. fahrenheit30-day average≤ 67.9 deg FJan007
Temperature, water deg. fahrenheit30-day average≤ 105 deg FMay007
Temperature, water deg. fahrenheit30-day average≤ 85.9 deg FNov007
Temperature, water deg. fahrenheit30-day average≤ 112.1 deg FJul007
Temperature, water deg. fahrenheit30-day average≤ 97.6 deg FOct007
Temperature, water deg. fahrenheit30-day average≤ 112.1 deg FAug007
Temperature, water deg. fahrenheit30-day average≤ 112.1 deg FSep007
Temperature, water deg. fahrenheit30-day average≤ 94.9 deg FApr007
Temperature, water deg. fahrenheit30-day average≤ 87.9 deg FMar007
Temperature, water deg. fahrenheit30-day average≤ 76 deg FDec007
Temperature, water deg. fahrenheit30-day average≤ 109.3 deg FJun007
Temperature, water deg. fahrenheit30-day average≤ 73.3 deg FFeb007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FJan007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FMay007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FNov007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FJul007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FOct007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FAug007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FSep007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FApr007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FMar007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FDec007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FJun007
Temperature, water deg. fahrenheitdaily maximum≤ 112.1 deg FFeb007
pHdaily minimum≥ 6 SUall year008
pHdaily maximum≤ 9 SUall year008
Solids, total suspended30-day average≤ 30 mg/Lall year008
Solids, total suspendeddaily maximum≤ 100 mg/Lall year008
Oil & Grease30-day average≤ 15 mg/Lall year008
Oil & Greasedaily maximum≤ 20 mg/Lall year008
Copper, total [as Cu]30-day average≤ 1 mg/Lall year008
Copper, total [as Cu]daily maximum≤ 1 mg/Lall year008
Iron, total [as Fe]30-day average≤ 1 mg/Lall year008
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year008

How strict are these limits?

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

Same industry: the 14 Electric Services permits in Iowa.

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Your permit document is the final word. As JSON: /api/v1/permits/IA0061859 · MCP: https://passage-data.com/mcp