Clean Water Act discharge permit · NPDES IA0031704

NEVADA CITY OF STP, Nevada, IA: NPDES IA0031704 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MajorDischarger class
14Pollutants under a numeric limit
2Pollutants with an effluent exceedance

NEVADA CITY OF STP, held by CITY OF NEVADA, holds NPDES permit IA0031704. EPA’s file records it issued February 1, 2022 and expiring January 31, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	NEVADA CITY OF STP
Permittee as filed	CITY OF NEVADA
NPDES ID	IA0031704
Permit status	Effective
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	February 1, 2022
Expiration date	January 31, 2027
Issuing agency	STA
Address	Nevada, IA 50201
Subwatershed	West Indian Creek (HUC 070801050502)
Program components on file	Biosolids, POTW
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

14Pollutants on file
14Under a numeric limit
7With a violation of any kind
2With 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]	48	4	4	April 30, 2025	60% over the limit
E. coli	1	3	3	October 31, 2024	18,948% over the limit
Solids, total suspended	9	8	0
BOD, carbonaceous [5 day, 20 C]	4	8	0
pH	5	4	0
Oxygen, dissolved [DO]	1	4	0
Copper, total [as Cu]	4	2	0
Chloride [as Cl]	13	0	0
Nitrogen, total [as N]	10	0	0
Phosphorus, total [as P]	10	0	0
BOD, 5-day, 20 deg. C	5	0	0
Nitrogen, Kjeldahl, total [as N]	5	0	0
Toxicity [acute], Ceriodaphnia dubia	1	0	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	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 IA0031704.

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.

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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 IA0031704 there.

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 IA0031704, held by CITY OF NEVADA for the NEVADA CITY OF STP in Nevada, IA, with an effective permit status and a Major Discharger class. The page lists 14 pollutants on file, 14 of them under a numeric limit, and 2 pollutants with an effluent exceedance, with the permit issued February 1, 2022 and expiring January 31, 2027.