Clean Water Act discharge permit · NPDES IA0041866

GUTHRIE CENTER CITY OF STP, Guthrie Center, IA: NPDES IA0041866 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
8Pollutants under a numeric limit
5Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

GUTHRIE CENTER CITY OF STP, held by CITY OF GUTHRIE CENTER, holds NPDES permit IA0041866. EPA’s file records it issued August 1, 2022 and expiring July 31, 2027.

GUTHRIE CENTER CITY OF STP, Guthrie Center, Iowa: Individual permit IA0041866, held by CITY OF GUTHRIE CENTER; Publicly owned treatment works; Effective; issued August 1, 2022, term to July 31, 2027, by STA; Sewage Treatment Facilities.

Flow, in conduit or thru treatment plant: 0 limits, 41 violations of any kind, 38 effluent exceedances, latest July 31, 2010, largest 354% over the limit.
BOD, carbonaceous [5 day, 20 C]: 5 limits, 18 violations of any kind, 3 effluent exceedances, latest May 31, 2023, largest 44% over the limit.
Solids, total suspended: 10 limits, 20 violations of any kind, 2 effluent exceedances, latest June 30, 2012, largest 88% over the limit.
Nitrogen, ammonia total [as N]: 48 limits, 2 violations of any kind, 2 effluent exceedances, latest May 31, 2026, largest 96% over the limit.
pH: 5 limits, 13 violations of any kind, 1 effluent exceedance, latest April 30, 2005.
Nitrogen, Kjeldahl, total [as N]: 10 limits, 16 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.
E. coli: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Depth of pond or reservoir in feet: 3 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; 689 were issued before IA0041866.

Coverages issued nearest IA0041866

May 1, 2022: RUNNELLS CITY OF STP, Runnells, IA0063355, held by CITY OF RUNNELLS
June 1, 2022: ARMSTRONG CITY OF STP, Armstrong, IA0028517, held by CITY OF ARMSTRONG
June 1, 2022: SOLON CITY OF STP, Solon, IA0036978, held by CITY OF SOLON
July 1, 2022: FARRAGUT CITY OF STP, Farragut, IA0023493, held by CITY OF FARRAGUT
August 1, 2022: CORNING CITY OF STP, Corning, IA0027375, held by CITY OF CORNING
August 1, 2022: WALKER CITY OF STP, Walker, IA0059081, held by CITY OF WALKER
August 1, 2022: HARPERS FERRY, CITY OF STP, Harpers Ferry, IA0070564, held by CITY OF HARPERS FERRY
September 1, 2022: CARROLL, CITY OF STP, Carroll, IA0021377, held by CITY OF CARROLL
September 1, 2022: INDIANOLA WATER RESOURCE RECOVERY FACILITY, Indianola, IA0053405, held by CITY OF INDIANOLA
October 1, 2022: HOMESTEAD SANITARY DISTRICT, Homestead, IA0023591

GUTHRIE CENTER CITY OF STP among its neighbors

Its county holds 16, 0 of them major permits; IA0041866 is a minor permit.

Other permits in the county

BAYARD CITY OF STP, Bayard: IA0061468, minor permit, permit term to October 31, 2021
CASEY, CITY OF STP, Casey: IA0027197, minor permit, permit term to March 8, 2006
COON RAPIDS CITY OF STP, Coon Rapids: IA0028983, minor permit, permit term to January 31, 2024
DIAMONDHEAD LAKE, Dexter: IA0068381, minor permit, permit term to April 30, 2024
DNR SPRINGBROOK STATE PARK, Guthrie Center: IA0075272, minor permit, permit term to August 31, 2023
FIREFLY CREEK RANCH, Guthrie Center: IA0076465, minor permit, permit term to April 30, 2027
FLINT HILLS RESOURCES MENLO (NOW POET BIOREFINING - MENLO), Menlo: IA0081311, minor permit, permit term to January 14, 2013
GUTHRIE CENTER EGG FARM, Guthrie Center: IA0075361, minor permit, permit term to September 30, 2024
LAKE PANORAMA ASSOCIATION WTP, Panora: IA0084212, minor permit, permit term to December 31, 2022
LINDEN CITY OF STP, Linden: IA0081973, minor permit, permit term to May 31, 2023

Identity

Facility as filed	GUTHRIE CENTER CITY OF STP
Permittee as filed	CITY OF GUTHRIE CENTER
NPDES ID	IA0041866
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	August 1, 2022
Expiration date	July 31, 2027
Issuing agency	STA
Address	Guthrie Center, IA 50115
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

9Pollutants on file
8Under a numeric limit
6With 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
Flow, in conduit or thru treatment plant	0	41	38	July 31, 2010	354% over the limit
BOD, carbonaceous [5 day, 20 C]	5	18	3	May 31, 2023	44% over the limit
Solids, total suspended	10	20	2	June 30, 2012	88% over the limit
Nitrogen, ammonia total [as N]	48	2	2	May 31, 2026	96% over the limit
pH	5	13	1	April 30, 2005
Nitrogen, Kjeldahl, total [as N]	10	16	0
BOD, 5-day, 20 deg. C	5	0	0
E. coli	3	0	0
Depth of pond or reservoir in feet	3	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0041866.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0041866.

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 IA0041866.

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

This public-records page covers Clean Water Act discharge permit NPDES IA0041866, held by CITY OF GUTHRIE CENTER for the GUTHRIE CENTER CITY OF STP in Guthrie Center, IA, an individual minor discharger permit with a status of Effective. The page lists 9 pollutants on file, 8 under a numeric limit, 6 with a violation of any kind, and 5 with an effluent exceedance.