Clean Water Act discharge permit · NPDES IA0027243

HUDSON CITY OF STP, Hudson, IA: NPDES IA0027243 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
9Pollutants with an effluent exceedance

HUDSON CITY OF STP, held by CITY OF HUDSON, holds NPDES permit IA0027243. EPA’s file records it issued August 1, 2018 and expiring July 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	HUDSON CITY OF STP
Permittee as filed	CITY OF HUDSON
NPDES ID	IA0027243
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, 2018
Expiration date	July 31, 2023
Issuing agency	STA
Address	Hudson, IA 50643
Subwatershed	Wilson Creek-Black Hawk Creek (HUC 070802050601)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

14Pollutants on file
11Under a numeric limit
11With a violation of any kind
9With 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
Chlorine, total residual	4	271	203	April 30, 2026	60,809% over the limit
Nitrogen, ammonia total [as N]	48	162	162	April 30, 2026	1,021% over the limit
pH	5	56	48	November 30, 2022
Flow, in conduit or thru treatment plant	0	44	44	October 31, 2007	360% over the limit
E. coli	0	61	11	April 30, 2018	3,768% over the limit
BOD, carbonaceous [5 day, 20 C]	4	27	11	April 30, 2022	248% over the limit
Nitrogen, total [as N]	2	17	9	December 31, 2015	112% over the limit
Coliform, fecal general	0	7	7	June 30, 2007	880% over the limit
Solids, total suspended	9	30	4	June 30, 2020	141% over the limit
Report due [yrmoda]	1	16	0
Oxygen, dissolved [DO]	1	4	0
BOD, 5-day, 20 deg. C	5	0	0
Nitrogen, Kjeldahl, total [as N]	5	0	0
Phosphorus, total [as P]	5	0	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0027243.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IA0027243 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES IA0027243 for HUDSON CITY OF STP in Hudson, IA, held by CITY OF HUDSON and listed as administratively continued. The register lists 14 pollutants on file, 11 of them under a numeric limit, and 9 with an effluent exceedance.