Clean Water Act discharge permit · NPDES IA0023485

HANCOCK CITY OF STP, Hancock, IA: NPDES IA0023485 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
6Pollutants under a numeric limit
4Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

HANCOCK CITY OF STP, held by CITY OF HANCOCK, holds NPDES permit IA0023485. EPA’s file records it issued August 1, 2019 and expiring July 31, 2024.

HANCOCK CITY OF STP, Hancock, Iowa: Individual permit IA0023485, held by CITY OF HANCOCK; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued August 1, 2019, term to July 31, 2024, by STA; Sewage Treatment Facilities.

Flow, in conduit or thru treatment plant: 0 limits, 16 violations of any kind, 16 effluent exceedances, latest July 31, 2008, largest 352% over the limit.
BOD, carbonaceous [5 day, 20 C]: 7 limits, 6 violations of any kind, 6 effluent exceedances, latest May 31, 2026, largest 62% over the limit.
Solids, total suspended: 7 limits, 3 violations of any kind, 3 effluent exceedances, latest May 31, 2026, largest 29% over the limit.
pH: 2 limits, 2 violations of any kind, 2 effluent exceedances, latest May 31, 2025.
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; 459 were issued before IA0023485.

Coverages issued nearest IA0023485

July 1, 2019: STORM LAKE CITY OF STP, Storm Lake, IA0032484, held by CITY OF STORM LAKE
July 1, 2019: PRAIRIE CITY, CITY OF STP, Prairie City, IA0033073, held by CITY OF PRAIRIE CITY
July 1, 2019: DOWS CITY OF STP, Dows, IA0042811, held by CITY OF DOWS
July 1, 2019: READLYN, CITY OF STP, Readlyn, IA0044440, held by CITY OF READLYN
July 1, 2019: PILOT MOUND CITY OF STP, Pilot Mound, IA0058530, held by CITY OF PILOT MOUND
August 1, 2019: FAIRFAX CITY OF STP, Fairfax, IA0030694, held by CITY OF FAIRFAX
August 1, 2019: CEDAR FALLS CITY OF STP, Cedar Falls, IA0036633, held by CITY OF CEDAR FALLS
August 1, 2019: BRIGHTON CITY OF STP, Brighton, IA0047911, held by CITY OF BRIGHTON
August 1, 2019: BOONE CITY OF STP, Boone, IA0058076, held by CITY OF BOONE
August 1, 2019: FREDERIKA CITY OF STP, Frederika, IA0058939, held by CITY OF FREDERIKA

HANCOCK CITY OF STP among its neighbors

Its county holds 37, 2 of them major permits; IA0023485 is a minor permit.

Other permits in the county

AVOCA CITY OF STP, Avoca: IA0030708, minor permit, permit term to May 31, 2025
BUCKEYE TERMINALS, LLC - COUNCIL BLUFFS TERMINAL, Council Bluffs: IA0071234, minor permit, permit term to June 30, 2024
CARSON CITY OF STP, Carson: IA0042901, minor permit, permit term to February 28, 2022
CARSON FEEDERS, Carson: IA0080144, minor permit, permit term to August 31, 2026
CARTER LAKE, CITY OF MS4, Carter Lake: IA0078891, minor permit, permit term to June 30, 2021
CHAPTERS COUNCIL BLUFFS OPCO, LLC (DBA CHAPTERS LIVING OF COUNCIL BLUFFS), Council Bluffs: IA0071269, minor permit, permit term to November 30, 2024
COUNCIL BLUFFS CITY OF STP, Council Bluffs: IA0036641, major permit, permit term to November 30, 2025
COUNCIL BLUFFS NARROWS TREATMENT PLANT, Council Bluffs: IA0077470, minor permit, permit term to December 31, 2018
COUNCIL BLUFFS, CITY OF MS4, Council Bluffs: IA0078271, minor permit, permit term to January 2, 2018
COUNCIL POINT WATER PURIFICATION PLANT, Council Bluffs: IA0082074, minor permit, permit term to August 31, 2022

Identity

Facility as filed	HANCOCK CITY OF STP
Permittee as filed	CITY OF HANCOCK
NPDES ID	IA0023485
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	August 1, 2019
Expiration date	July 31, 2024
Issuing agency	STA
Address	Hancock, IA 51536
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

7Pollutants on file
6Under a numeric limit
4With 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
Flow, in conduit or thru treatment plant	0	16	16	July 31, 2008	352% over the limit
BOD, carbonaceous [5 day, 20 C]	7	6	6	May 31, 2026	62% over the limit
Solids, total suspended	7	3	3	May 31, 2026	29% over the limit
pH	2	2	2	May 31, 2025
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 IA0023485.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0023485.

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 IA0023485.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IA0023485.

Start the watch

How we handle your data → Privacy

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES IA0023485 for HANCOCK CITY OF STP in Hancock, IA, held by CITY OF HANCOCK, a minor discharger classed as a publicly owned treatment works. The permit is listed as administratively continued, with issue and expiration dates of August 1, 2019 and July 31, 2024, and the file shows 7 pollutants on file, 6 under a numeric limit, and 4 with an effluent exceedance.