Clean Water Act discharge permit · NPDES IA0072443

PORTSMOUTH CITY OF STP, Portsmouth, IA: NPDES IA0072443 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
6Pollutants under a numeric limit
3Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

PORTSMOUTH CITY OF STP, held by CITY OF PORTSMOUTH STP, holds NPDES permit IA0072443. EPA’s file records it issued February 1, 2020 and expiring January 31, 2025.

PORTSMOUTH CITY OF STP, Portsmouth, Iowa: Individual permit IA0072443, held by CITY OF PORTSMOUTH STP; 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.

pH: 2 limits, 12 violations of any kind, 6 effluent exceedances, latest November 30, 2021.
Flow, in conduit or thru treatment plant: 0 limits, 6 violations of any kind, 6 effluent exceedances, latest October 31, 2007, largest 105% over the limit.
Solids, total suspended: 5 limits, 5 violations of any kind, 1 effluent exceedance, latest November 30, 2019, largest 23% over the limit.
BOD, carbonaceous [5 day, 20 C]: 5 limits, 4 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 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; 503 were issued before IA0072443.

Coverages issued nearest IA0072443

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: ALLISON CITY OF STP, Allison, IA0042731, held by CITY OF ALLISON
February 1, 2020: BOYDEN CITY OF STP, Boyden, IA0042838, held by CITY OF BOYDEN
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
March 1, 2020: BANCROFT CITY OF STP, Bancroft, IA0057762, held by CITY OF BANCROFT
March 1, 2020: GRANDVIEW CITY OF STP, Grandview, IA0062901, held by CITY OF GRANDVIEW

PORTSMOUTH CITY OF STP among its neighbors

EPA’s permit file holds 3 discharge permits in the Village of Portsmouth-Mosquito Creek subwatershed (HUC 102300060402), IA0072443 among them. Its county holds 11, 1 of them major permits; IA0072443 is a minor permit.

Other permits in the Village of Portsmouth-Mosquito Creek subwatershed (HUC 102300060402)

PANAMA CITY OF STP, Panama: IA0071455, minor permit, permit term to September 30, 2029
PANAMA CITY OF WTP, Panama: IA0082856, minor permit, permit term to June 30, 2020

Identity

Facility as filed	PORTSMOUTH CITY OF STP
Permittee as filed	CITY OF PORTSMOUTH STP
NPDES ID	IA0072443
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	Portsmouth, IA 51565
Subwatershed	Village of Portsmouth-Mosquito Creek (HUC 102300060402)

Effluent limits and exceedances

7Pollutants on file
6Under a numeric limit
4With 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
pH	2	12	6	November 30, 2021
Flow, in conduit or thru treatment plant	0	6	6	October 31, 2007	105% over the limit
Solids, total suspended	5	5	1	November 30, 2019	23% over the limit
BOD, carbonaceous [5 day, 20 C]	5	4	0
Nitrogen, ammonia total [as N]	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 IA0072443.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0072443.

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 IA0072443.

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

This public-records page covers NPDES permit IA0072443, held by CITY OF PORTSMOUTH STP for PORTSMOUTH CITY OF STP in Portsmouth, IA, with its status shown as administratively continued and its program listed as publicly owned treatment works. The page lists 7 pollutants on file, 6 under a numeric limit, 4 with a violation of any kind, and 3 with an effluent exceedance.