Clean Water Act discharge permit · NPDES IA0042731

ALLISON CITY OF STP, Allison, IA: NPDES IA0042731 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
3Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

ALLISON CITY OF STP, held by CITY OF ALLISON, holds NPDES permit IA0042731. EPA’s file records it issued February 1, 2020 and expiring January 31, 2025.

ALLISON CITY OF STP, Allison, Iowa: Individual permit IA0042731, held by CITY OF ALLISON; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued February 1, 2020, term to January 31, 2025, by STA; Sewage Treatment Facilities.

Nitrogen, ammonia total [as N]: 96 limits, 34 violations of any kind, 34 effluent exceedances, latest July 31, 2025, largest 515% over the limit.
BOD, carbonaceous [5 day, 20 C]: 4 limits, 20 violations of any kind, 12 effluent exceedances, latest February 28, 2025, largest 65% over the limit.
Solids, total suspended: 9 limits, 11 violations of any kind, 1 effluent exceedance, latest October 31, 2020, largest 122% over the limit.
pH: 5 limits, 16 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 2 limits, 5 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 1 limit, 3 violations of any kind, 0 effluent exceedances.
Lead, total [as Pb]: 4 limits, 2 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Silver, total [as Ag]: 4 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.
E. coli: 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; 503 were issued before IA0042731.

Coverages issued nearest IA0042731

February 1, 2020: STANHOPE CITY OF STP, Stanhope, IA0032743, held by CITY OF STANHOPE
February 1, 2020: SHEFFIELD CITY OF STP, Sheffield, IA0036005, held by CITY OF SHEFFIELD
February 1, 2020: MARCUS CITY OF STP, Marcus, IA0036111, held by CITY OF MARCUS
February 1, 2020: BARNUM CITY OF STP, Barnum, IA0041246, held by CITY OF BARNUM
February 1, 2020: STUART CITY OF STP, Stuart, IA0041858, held by CITY OF STUART
February 1, 2020: BOYDEN CITY OF STP, Boyden, IA0042838, held by CITY OF BOYDEN
February 1, 2020: PORTSMOUTH CITY OF STP, Portsmouth, IA0072443, held by CITY OF PORTSMOUTH STP
February 1, 2020: PULASKI, CITY OF STP, Pulaski, IA0074802, held by RATHBUN REGIONAL WATER ASSOCIATION
March 1, 2020: ROLFE CITY OF STP, Rolfe, IA0032310, held by CITY OF ROLFE
March 1, 2020: ALDEN CITY OF STP, Alden, IA0034339, held by CITY OF ALDEN

ALLISON CITY OF STP among its neighbors

EPA’s permit file holds 1 discharge permits in the Feddeke Creek subwatershed (HUC 070802040604), IA0042731 among them. Its county holds 10, 0 of them major permits; IA0042731 is a minor permit.

Identity

Facility as filed	ALLISON CITY OF STP
Permittee as filed	CITY OF ALLISON
NPDES ID	IA0042731
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	February 1, 2020
Expiration date	January 31, 2025
Issuing agency	STA
Address	Allison, IA 50602
Subwatershed	Feddeke Creek (HUC 070802040604)
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
7With a violation of any kind
3With 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
Nitrogen, ammonia total [as N]	96	34	34	July 31, 2025	515% over the limit
BOD, carbonaceous [5 day, 20 C]	4	20	12	February 28, 2025	65% over the limit
Solids, total suspended	9	11	1	October 31, 2020	122% over the limit
pH	5	16	0
Nitrogen, total [as N]	2	5	0
Oxygen, dissolved [DO]	1	3	0
Lead, total [as Pb]	4	2	0
BOD, 5-day, 20 deg. C	5	0	0
Silver, total [as Ag]	4	0	0
Depth of pond or reservoir in feet	3	0	0
E. coli	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0042731.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0042731.

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 IA0042731.

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

This public-records page covers NPDES permit IA0042731 for ALLISON CITY OF STP in Allison, IA, held by CITY OF ALLISON, with a status of administratively continued and a minor discharger class. The page lists 11 pollutants on file, 3 of them under a numeric limit, and 3 with an effluent exceedance.