Clean Water Act discharge permit · NPDES IA0032662

SHELDON CITY OF STP, Sheldon, IA: NPDES IA0032662 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
15Pollutants under a numeric limit
4Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

SHELDON CITY OF STP, held by CITY OF SHELDON, holds NPDES permit IA0032662. EPA’s file records it issued April 1, 2021 and expiring March 31, 2026.

SHELDON CITY OF STP, Sheldon, Iowa: Individual permit IA0032662, held by CITY OF SHELDON; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued April 1, 2021, term to March 31, 2026, by STA; Sewage Treatment Facilities.

Silver, total [as Ag]: 0 limits, 9 violations of any kind, 9 effluent exceedances, latest July 31, 2017, largest 279% over the limit.
pH: 5 limits, 9 violations of any kind, 6 effluent exceedances, latest March 31, 2025.
Nitrogen, ammonia total [as N]: 48 limits, 5 violations of any kind, 5 effluent exceedances, latest April 30, 2025, largest 155% over the limit.
Copper, total [as Cu]: 4 limits, 9 violations of any kind, 3 effluent exceedances, latest July 31, 2022, largest 59% over the limit.
Solids, total suspended: 9 limits, 6 violations of any kind, 0 effluent exceedances.
Sulfate, total [as SO4]: 4 limits, 6 violations of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 4 limits, 6 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 1 limit, 3 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 10 limits, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 10 limits, 0 violations of any kind, 0 effluent exceedances.
Chloride [as Cl]: 9 limits, 0 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
E. coli: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Toxicity [acute], Ceriodaphnia dubia: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 0 violations of any kind, 0 effluent exceedances.

Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 620 were issued before IA0032662. CITY OF SHELDON holds 2 permits in Iowa.

Other permits held by CITY OF SHELDON

CITY OF SHELDON, Sheldon: IAL032662, issued January 1, 2021

Coverages issued nearest IA0032662

March 1, 2021: DEXTER CITY OF STP, Dexter, IA0058661, held by CITY OF DEXTER
March 1, 2021: URBANA CITY OF STP, Urbana, IA0059072, held by CITY OF URBANA
March 1, 2021: DOUDS/LEANDO,CITY OF(RATHBUN REGIONAL WATER ASSOC), Douds, IA0076031, held by RATHBUN REGIONAL WATER ASSOCIATION
March 1, 2021: HARPER, CITY OF STP, Harper, IA0079359, held by REGIONAL UTILITY SERVICE SYSTEMS
April 1, 2021: CORALVILLE CITY OF STP, Coralville, IA0020788, held by CITY OF CORALVILLE
April 1, 2021: SWISHER CITY OF STP, Swisher, IA0033774, held by CITY OF SWISHER
April 1, 2021: OSKALOOSA CITY OF STP (NORTHEAST), Oskaloosa, IA0038539, held by CITY OF OSKALOOSA
April 1, 2021: REASNOR CITY OF STP, Reasnor, IA0047775, held by CITY OF REASNOR
April 1, 2021: FERTILE CITY OF STP, Fertile, IA0058718, held by CITY OF FERTILE
May 1, 2021: IDA GROVE CITY OF STP, Ida Grove, IA0020761, held by CITY OF IDA GROVE

SHELDON CITY OF STP among its neighbors

EPA’s permit file holds 4 discharge permits in the Engels Creek-Floyd River subwatershed (HUC 102300020303), IA0032662 among them. Its county holds 15, 1 of them major permits; IA0032662 is a major permit.

Other permits in the Engels Creek-Floyd River subwatershed (HUC 102300020303)

AG PROCESSING INC. - SHELDON, Sheldon: IA0063771, minor permit, permit term to March 30, 2005
GRANSTRA LIVESTOCK LLC, Sheldon: IA0080349, minor permit, permit term to September 30, 2022
RITTER CATTLE COMPANY, Sheldon: IA0081230, minor permit, permit term to June 30, 2023

Identity

Facility as filed	SHELDON CITY OF STP
Permittee as filed	CITY OF SHELDON
NPDES ID	IA0032662
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	April 1, 2021
Expiration date	March 31, 2026
Issuing agency	STA
Address	Sheldon, IA 51201
Receiving water impaired	303(D) Listed
Subwatershed	Engels Creek-Floyd River (HUC 102300020303)
Program components on file	Biosolids, POTW
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

16Pollutants on file
15Under a numeric limit
8With a violation of any kind
4With 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
Silver, total [as Ag]	0	9	9	July 31, 2017	279% over the limit
pH	5	9	6	March 31, 2025
Nitrogen, ammonia total [as N]	48	5	5	April 30, 2025	155% over the limit
Copper, total [as Cu]	4	9	3	July 31, 2022	59% over the limit
Solids, total suspended	9	6	0
Sulfate, total [as SO4]	4	6	0
BOD, carbonaceous [5 day, 20 C]	4	6	0
Oxygen, dissolved [DO]	1	3	0
Nitrogen, total [as N]	10	0	0
Phosphorus, total [as P]	10	0	0
Chloride [as Cl]	9	0	0
BOD, 5-day, 20 deg. C	5	0	0
Nitrogen, Kjeldahl, total [as N]	5	0	0
E. coli	1	0	0
Toxicity [acute], Ceriodaphnia dubia	1	0	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0032662.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0032662.

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 IA0032662.

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

This public-records page covers NPDES permit IA0032662, held by CITY OF SHELDON for the SHELDON CITY OF STP in Sheldon, IA, and currently administratively continued as a Major Discharger. The facts list 4 pollutants under a numeric limit and 4 pollutants with an effluent exceedance, with the permit's Engels Creek-Floyd River subwatershed (HUC 102300020303) noted.