Clean Water Act discharge permit · NPDES IA0025372

KIMBALLTON CITY OF STP, Kimballton, IA: NPDES IA0025372 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
6Pollutants under a numeric limit
6Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

KIMBALLTON CITY OF STP, held by CITY OF KIMBALLTON, holds NPDES permit IA0025372. EPA’s file records it issued January 1, 2018 and expiring December 31, 2022.

KIMBALLTON CITY OF STP, Kimballton, Iowa: Individual permit IA0025372, held by CITY OF KIMBALLTON; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued January 1, 2018, term to December 31, 2022, by STA; Sewage Treatment Facilities.

BOD, carbonaceous [5 day, 20 C]: 4 limits, 32 violations of any kind, 18 effluent exceedances, latest January 31, 2026, largest 176% over the limit.
Flow, in conduit or thru treatment plant: 0 limits, 18 violations of any kind, 18 effluent exceedances, latest June 30, 2008, largest 70% over the limit.
Solids, total suspended: 9 limits, 27 violations of any kind, 13 effluent exceedances, latest January 31, 2024, largest 100% over the limit.
Nitrogen, ammonia total [as N]: 48 limits, 15 violations of any kind, 7 effluent exceedances, latest March 31, 2025, largest 345% over the limit.
Oxygen, dissolved [DO]: 1 limit, 8 violations of any kind, 6 effluent exceedances, latest January 31, 2026, largest 72% over the limit.
pH: 5 limits, 6 violations of any kind, 4 effluent exceedances, latest July 31, 2025.
BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.

Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 299 were issued before IA0025372.

Coverages issued nearest IA0025372

December 1, 2017: HARVEY CITY OF STP, Harvey, IA0072338, held by CITY OF HARVEY
January 1, 2018: HOLSTEIN CITY OF STP, Holstein, IA0021954, held by CITY OF HOLSTEIN
January 1, 2018: JEWELL CITY OF STP, Jewell, IA0024422, held by CITY OF JEWELL
January 1, 2018: COGGON CITY OF STP, Coggon, IA0024473, held by CITY OF COGGON
January 1, 2018: GLADBROOK CITY OF STP, Gladbrook, IA0025330, held by CITY OF GLADBROOK
January 1, 2018: CALAMUS CITY OF STP, Calamus, IA0028622, held by CITY OF CALAMUS
January 1, 2018: IOWA AMERICAN WATER - DONAHUE STP, Donahue, IA0029017, held by CITY OF DONAHUE
January 1, 2018: PLAINFIELD CITY OF STP, Plainfield, IA0033693, held by CITY OF PLAINFIELD
January 1, 2018: LELAND CITY OF STP, Leland, IA0036528, held by CITY OF LELAND
January 1, 2018: LAKE PARK CITY OF STP, Lake Park, IA0036919, held by CITY OF LAKE PARK

KIMBALLTON CITY OF STP among its neighbors

EPA’s permit file holds 1 discharge permits in the Upper Indian Creek subwatershed (HUC 102400030403), IA0025372 among them. Its county holds 5, 0 of them major permits; IA0025372 is a minor permit.

Identity

Facility as filed	KIMBALLTON CITY OF STP
Permittee as filed	CITY OF KIMBALLTON
NPDES ID	IA0025372
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	January 1, 2018
Expiration date	December 31, 2022
Issuing agency	STA
Address	Kimballton, IA 51543
Subwatershed	Upper Indian Creek (HUC 102400030403)
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

7Pollutants on file
6Under a numeric limit
6With a violation of any kind
6With 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
BOD, carbonaceous [5 day, 20 C]	4	32	18	January 31, 2026	176% over the limit
Flow, in conduit or thru treatment plant	0	18	18	June 30, 2008	70% over the limit
Solids, total suspended	9	27	13	January 31, 2024	100% over the limit
Nitrogen, ammonia total [as N]	48	15	7	March 31, 2025	345% over the limit
Oxygen, dissolved [DO]	1	8	6	January 31, 2026	72% over the limit
pH	5	6	4	July 31, 2025
BOD, 5-day, 20 deg. C	5	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0025372.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0025372.

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 IA0025372.

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

This public-records page covers NPDES permit IA0025372 for the KIMBALLTON CITY OF STP in Kimballton, Iowa, held by CITY OF KIMBALLTON, with a permit status of administratively continued and a minor discharger class. The page lists 6 pollutants under a numeric limit and 6 pollutants with an effluent exceedance, within the Upper Indian Creek watershed (HUC 102400030403).