Clean Water Act discharge permit · NPDES IA0079677

AYRSHIRE, CITY OF STP, Ayrshire, IA: NPDES IA0079677 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

AYRSHIRE, CITY OF STP, held by IOWA LAKES REGIONAL WATER, holds NPDES permit IA0079677. EPA’s file records it issued October 24, 2005 and expiring October 23, 2010.

AYRSHIRE, CITY OF STP, Ayrshire, Iowa: Individual permit IA0079677, held by IOWA LAKES REGIONAL WATER; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 24, 2005, term to October 23, 2010, by STA.

BOD, carbonaceous [5 day, 20 C]: 0 limits, 8 violations of any kind, 8 effluent exceedances, latest May 31, 2025, largest 100% over the limit.

Iowa holds 734 Publicly owned treatment works coverages of this permit type in EPA’s file; 25 were issued before IA0079677. IOWA LAKES REGIONAL WATER holds 9 permits in Iowa.

Other permits held by IOWA LAKES REGIONAL WATER

GRUVER CITY OF, Gruver: IA0077488, issued November 1, 2011
DICKENS WASTEWATER TREATMENT FACILITY, Dickens: IA0080691, issued February 1, 2018
IOWA LAKES REGIONAL WATER OSGOOD PLANT, Graettinger: IA0081183, issued October 1, 2020
DOLLIVER, CITY OF STP, Dolliver: IA0082147, issued November 1, 2020
ARCHER CITY OF STP, Archer: IA0082422, issued December 1, 2016
LU VERNE, CITY OF STP, Lu Verne: IA0082571, issued May 1, 2011
MELVIN CITY OF STP, Melvin: IA0083658, issued June 1, 2011
WEBB, CITY OF STP, Webb: IA0083666, issued June 1, 2018

Coverages issued nearest IA0079677

June 28, 2004: DANVILLE CITY OF STP, Danville, IA0025861, held by CITY OF DANVILLE
September 21, 2004: BANKSTON CITY OF STP, Bankston, IA0071731, held by CITY OF BANKSTON
November 23, 2004: MAHARISHI VEDIC CITY, Fairfield, IA0078417
June 15, 2005: TIPTON CITY OF STP (EAST), Tipton, IA0070581, held by CITY OF TIPTON (EAST)
October 5, 2005: PERRY CITY OF STP, Perry, IA0032379, held by CITY OF PERRY
February 14, 2007: MISSOURI VALLEY CITY OF STP, Missouri Valley, IA0026654, held by CITY OF MISSOURI VALLEY
February 26, 2007: ELLIOTT CITY OF STP, Elliott, IA0034398, held by CITY OF ELLIOTT
July 2, 2007: AVERY, CITY OF STP-(RATHBUN RWA), IA0074713, held by RATHBUN REGIONAL WATER ASSOCIATION
September 7, 2007: STRATFORD CITY OF STP, Stratford, IA0035980, held by CITY OF STRATFORD
September 18, 2007: SHELBY CITY OF STP, Shelby, IA0036579, held by CITY OF SHELBY

AYRSHIRE, CITY OF STP among its neighbors

EPA’s permit file holds 1 discharge permits in the Silver Creek subwatershed (HUC 071000020302), IA0079677 among them. Its county holds 9, 1 of them major permits; IA0079677 is a minor permit.

Identity

Facility as filed	AYRSHIRE, CITY OF STP
Permittee as filed	IOWA LAKES REGIONAL WATER
NPDES ID	IA0079677
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 24, 2005
Expiration date	October 23, 2010
Issuing agency	STA
Address	Ayrshire, IA 50515
Subwatershed	Silver Creek (HUC 071000020302)

Effluent limits and exceedances

1Pollutants on file
0Under a numeric limit
1With a violation of any kind
1With 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]	0	8	8	May 31, 2025	100% over the limit

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0079677.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0079677.

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 IA0079677.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit IA0079677 for the Ayrshire, CITY OF STP facility in Ayrshire, IA, held by IOWA LAKES REGIONAL WATER, with the permit status listed as administratively continued and a discharger class of 0. The facts list 1 pollutant on file, 0 under a numeric limit, and 1 with an effluent exceedance, within the Silver Creek watershed (HUC 071000020302).