Clean Water Act discharge permit · NPDES IA0058611

OTTUMWA CITY OF STP, Ottumwa, IA: NPDES IA0058611 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
0Pollutants under a numeric limit
3Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

OTTUMWA CITY OF STP, held by CITY OF OTTUMWA, holds NPDES permit IA0058611. EPA’s file records it issued July 1, 2018 and expiring June 30, 2023.

OTTUMWA CITY OF STP, Ottumwa, Iowa: Individual permit IA0058611, held by CITY OF OTTUMWA; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued July 1, 2018, term to June 30, 2023, by STA; Sewage Treatment Facilities.

Solids, total suspended: 0 limits, 7 violations of any kind, 3 effluent exceedances, latest June 30, 2026, largest 287% over the limit.
BOD, carbonaceous [5 day, 20 C]: 0 limits, 6 violations of any kind, 2 effluent exceedances, latest September 30, 2006, largest 230% over the limit.
pH: 0 limits, 1 violation of any kind, 1 effluent exceedance, latest September 30, 2014.
Cyanide, total [as CN]: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Selenium, total [as Se]: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Phenols: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Mercury, total [as Hg]: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 0 limits, 2 violations of any kind, 0 effluent exceedances.
Toxicity [acute], Ceriodaphnia dubia: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Toxicity [acute], Pimephales promelas [Fathead Minnow]: 0 limits, 1 violation of any kind, 0 effluent exceedances.

Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 359 were issued before IA0058611.

Coverages issued nearest IA0058611

July 1, 2018: TERRIL CITY OF STP, Terril, IA0036609, held by CITY OF TERRIL
July 1, 2018: FONTANELLE CITY OF STP, Fontanelle, IA0041840, held by CITY OF FONTANELLE
July 1, 2018: DEFIANCE CITY OF STP, Defiance, IA0042862, held by CITY OF DEFIANCE
July 1, 2018: SPRAGUEVILLE CITY OF STP, Spragueville, IA0050741, held by CITY OF SPRAGUEVILLE
July 1, 2018: BREDA CITY OF STP, Breda, IA0056103, held by CITY OF BREDA
July 1, 2018: MORNING SUN CITY OF STP, Morning Sun, IA0059587, held by CITY OF MORNING SUN
July 1, 2018: MOORHEAD CITY OF STP, Moorhead, IA0062995, held by CITY OF MOORHEAD
July 1, 2018: WODEN CITY OF STP, Woden, IA0084174, held by CITY OF WODEN
August 1, 2018: LAKE CITY CITY OF STP, Lake City, IA0020842, held by CITY OF LAKE CITY
August 1, 2018: DOON CITY OF STP, Doon, IA0023736, held by CITY OF DOON

OTTUMWA CITY OF STP among its neighbors

EPA’s permit file holds 6 discharge permits in the Kettle Creek-Des Moines River subwatershed (HUC 071000090709), IA0058611 among them. Its county holds 17, 3 of them major permits; IA0058611 is a major permit.

Other permits in the Kettle Creek-Des Moines River subwatershed (HUC 071000090709)

OTTUMWA WATER WORKS, CITY OF, Ottumwa: IA0000035, minor permit, permit term to April 30, 2021
OTTUMWA, CITY OF MS4, Ottumwa: IA0078972, minor permit, permit term to February 29, 2020
ROYCE VALLEY VILLAGE LLC, Ottumwa: IA0069663, minor permit, permit term to February 29, 2024
THE AMERICAN BOTTLING COMPANY, Ottumwa: IA0083453, minor permit, permit term to October 31, 2016
WATER POLLUTION CONTROL FACILITY, Ottumwa: IAL058611, minor permit, permit term to December 31, 2025

Identity

Facility as filed	OTTUMWA CITY OF STP
Permittee as filed	CITY OF OTTUMWA
NPDES ID	IA0058611
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	July 1, 2018
Expiration date	June 30, 2023
Issuing agency	STA
Address	Ottumwa, IA 52501
Receiving water impaired	303(D) Listed
Subwatershed	Kettle Creek-Des Moines River (HUC 071000090709)
Program components on file	Biosolids, POTW, Pretreatment
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	RCRA handler IAP000001526; ICIS-AIR source IA0000001917900084

Effluent limits and exceedances

10Pollutants on file
0Under a numeric limit
10With a violation of any kind
3With 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	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	7	3	June 30, 2026	287% over the limit
BOD, carbonaceous [5 day, 20 C]	6	2	September 30, 2006	230% over the limit
pH	1	1	September 30, 2014
Cyanide, total [as CN]	4	0
Selenium, total [as Se]	4	0
Phenols	4	0
Mercury, total [as Hg]	4	0
Nitrogen, ammonia total [as N]	2	0
Toxicity [acute], Ceriodaphnia dubia	1	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0058611.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0058611.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES IA0058611.

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Nearby on the register

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

This public-records page covers the Clean Water Act NPDES permit IA0058611 for the Ottumwa City of STP in Ottumwa, IA, held by the City of Ottumwa, a major discharger and publicly owned treatment works that is administratively continued after its June 30, 2023 expiration. The page lists 0 major dischargers in class, 3 pollutants under a numeric limit, and 3 pollutants with an effluent exceedance, with the permit's status as of October 14, 2026.