Clean Water Act discharge permit · NPDES IA0004103

MIDAMERICAN ENERGY - NEAL NORTH ENERGY CENTER, Sergeant Bluff, IA: NPDES IA0004103 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MajorDischarger class
8Pollutants under a numeric limit
5Pollutants with an effluent exceedance

MIDAMERICAN ENERGY - NEAL NORTH ENERGY CENTER, held by MIDAMERICAN ENERGY COMPANY, holds NPDES permit IA0004103. EPA’s file records it issued April 1, 2024 and expiring March 31, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	MIDAMERICAN ENERGY - NEAL NORTH ENERGY CENTER
Permittee as filed	MIDAMERICAN ENERGY COMPANY
NPDES ID	IA0004103
Permit status	Effective
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	April 1, 2024
Expiration date	March 31, 2029
Issuing agency	STA
Address	Sergeant Bluff, IA 51054
Receiving water impaired	303(D) Listed
Subwatershed	Bacon Creek-Missouri River (HUC 102300010305)
NAICS	221112 – Fossil Fuel Electric Power Generation
SIC	4911 – Electric Services

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

9Pollutants on file
8Under a numeric limit
7With a violation of any kind
5With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
pH	4	35	1	March 31, 2003
Solids, total suspended	4	35	1	May 31, 2002	17% over the limit
Toxicity [acute], Ceriodaphnia dubia	1	19	1	October 31, 2009	100% over the limit
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	19	1	August 31, 2021	100% over the limit
Flow, in conduit or thru treatment plant	0	1	1	October 31, 2001	4% over the limit
Iron, total [as Fe]	2	68	0
Oil & Grease	4	38	0
Temperature, water deg. fahrenheit	12	0	0
Copper, total [as Cu]	2	0	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0004103.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IA0004103.

Start the watch

How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IA0004103 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act NPDES permit IA0004103, held by MIDAMERICAN ENERGY COMPANY for the MIDAMERICAN ENERGY - NEAL NORTH ENERGY CENTER in Sergeant Bluff, IA, with permit status recorded as Effective and a Major discharger class. The page lists 8 pollutants under a numeric limit and 5 pollutants with an effluent exceedance, based on EPA's permit file as loaded on October 14, 2026.