Clean Water Act discharge permit · NPDES IA0048330

MINDEN CITY OF STP, Minden, IA: NPDES IA0048330 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
7Pollutants under a numeric limit
4Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

MINDEN CITY OF STP, held by CITY OF MINDEN, holds NPDES permit IA0048330. EPA’s file records it issued October 1, 2015 and expiring September 30, 2020.

MINDEN CITY OF STP, Minden, Iowa: Individual permit IA0048330, held by CITY OF MINDEN; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 1, 2015, term to September 30, 2020, by STA; Sewage Treatment Facilities.

Solids, total suspended: 12 limits, 12 violations of any kind, 8 effluent exceedances, latest October 31, 2025, largest 151% over the limit.
BOD, carbonaceous [5 day, 20 C]: 7 limits, 13 violations of any kind, 7 effluent exceedances, latest November 30, 2025, largest 84% over the limit.
Nitrogen, ammonia total [as N]: 48 limits, 9 violations of any kind, 1 effluent exceedance, latest September 30, 2018, largest 44% over the limit.
pH: 5 limits, 5 violations of any kind, 1 effluent exceedance, latest November 30, 2016.
Oxygen, dissolved [DO]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 5 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; 121 were issued before IA0048330.

Coverages issued nearest IA0048330

September 1, 2015: BLUE GRASS CITY OF STP, Blue Grass, IA0028975, held by CITY OF BLUE GRASS
September 1, 2015: UNION CITY OF STP, Union, IA0034266, held by CITY OF UNION
September 1, 2015: JOICE, CITY OF STP, Joice, IA0052077, held by JOICE, CITY OF
September 1, 2015: MOUNT AUBURN CITY OF STP, Mount Auburn, IA0059153, held by CITY OF MOUNT AUBURN
September 1, 2015: DEEP RIVER, CITY OF STP, Deep River, IA0071943, held by CITY OF DEEP RIVER
October 1, 2015: LORIMOR CITY OF STP, Lorimor, IA0062910, held by CITY OF LORIMOR
November 1, 2015: AURELIA CITY OF STP, Aurelia, IA0028908, held by CITY OF AURELIA
January 1, 2016: MALLARD CITY OF STP, Mallard, IA0023370, held by CITY OF MALLARD
February 1, 2016: EARLING CITY OF STP, Earling, IA0025364, held by CITY OF EARLING
February 1, 2016: GRIMES, CITY OF STP, Grimes, IA0035939, held by City of Grimes

MINDEN CITY OF STP among its neighbors

EPA’s permit file holds 3 discharge permits in the Village of Minden-Keg Creek subwatershed (HUC 102400010102), IA0048330 among them. Its county holds 37, 2 of them major permits; IA0048330 is a minor permit.

Other permits in the Village of Minden-Keg Creek subwatershed (HUC 102400010102)

FEEDLOT SERVICE CO., Neola: IA0053350, minor permit, permit term to April 30, 2027
NORTH RIDGE FEEDLOT, Neola: IA0077666, minor permit, permit term to January 31, 2025

Identity

Facility as filed	MINDEN CITY OF STP
Permittee as filed	CITY OF MINDEN
NPDES ID	IA0048330
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	October 1, 2015
Expiration date	September 30, 2020
Issuing agency	STA
Address	Minden, IA 51553
Receiving water impaired	303(D) Listed
Subwatershed	Village of Minden-Keg Creek (HUC 102400010102)
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

7Pollutants on file
7Under a numeric limit
5With 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
Solids, total suspended	12	12	8	October 31, 2025	151% over the limit
BOD, carbonaceous [5 day, 20 C]	7	13	7	November 30, 2025	84% over the limit
Nitrogen, ammonia total [as N]	48	9	1	September 30, 2018	44% over the limit
pH	5	5	1	November 30, 2016
Oxygen, dissolved [DO]	1	2	0
BOD, 5-day, 20 deg. C	5	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 IA0048330.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0048330.

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 IA0048330.

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

This public-records page covers NPDES permit IA0048330 for the MINDEN CITY OF STP in Minden, IA, held by CITY OF MINDEN, with its status and dates as EPA's permit file stood on October 14, 2026. The page lists a Minor Discharger class of 7, 4 pollutants under a numeric limit, and 4 pollutants with an effluent exceedance, within the Village of Minden-Keg Creek subwatershed (HUC 102400010102).