MIDAMERICAN ENERGY COMPANY

NPDES permit IA0004103 · Major NON-POTW · effective, expires 2029-03-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 33 forms filed late

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

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 (30)

OutfallParameterStatisticLimitMonths
009Temperature, water deg. fahrenheit30DA AVG <= 125.1 deg F Jul
009Temperature, water deg. fahrenheit30DA AVG <= 107.2 deg F Apr
009Temperature, water deg. fahrenheit30DA AVG <= 84.4 deg F Mar
009Temperature, water deg. fahrenheit30DA AVG <= 69.3 deg F Jan
009Temperature, water deg. fahrenheit30DA AVG <= 68.5 deg F Dec
009Temperature, water deg. fahrenheit30DA AVG <= 86.2 deg F Nov
009Temperature, water deg. fahrenheit30DA AVG <= 100.6 deg F Oct
009Temperature, water deg. fahrenheit30DA AVG <= 115.9 deg F May
009Temperature, water deg. fahrenheit30DA AVG <= 68.9 deg F Feb
009Temperature, water deg. fahrenheit30DA AVG <= 123.3 deg F Aug
009Temperature, water deg. fahrenheit30DA AVG <= 118.8 deg F Sep
009Temperature, water deg. fahrenheit30DA AVG <= 121.5 deg F Jun
016pHDAILY MN >= 6 SU all year
016pHDAILY MX <= 9 SU all year
016Solids, total suspended30DA AVG <= 30 mg/L all year
016Solids, total suspendedDAILY MX <= 100 mg/L all year
016Oil & Grease30DA AVG <= 15 mg/L all year
016Oil & GreaseDAILY MX <= 20 mg/L all year
016Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 N=0;Y=1 all year
016Toxicity [acute], Pimephales promelas [Fathead Minnow]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 suspendedDAILY MX <= 100 mg/L all year
017Oil & Grease30DA AVG <= 15 mg/L all year
017Oil & GreaseDAILY MX <= 20 mg/L all year
017Copper, total [as Cu]30DA AVG <= 1 mg/L all year
017Copper, total [as Cu]DAILY MX <= 1 mg/L all year
017Iron, total [as Fe]30DA AVG <= 1 mg/L all year
017Iron, total [as Fe]DAILY MX <= 1 mg/L 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