Clean Water Act discharge permit · NPDES IA0063860

A.Y. MCDONALD MFG. CO., Dubuque, IA: NPDES IA0063860 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
3Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

A.Y. MCDONALD MFG. CO., held by A.Y. MCDONALD INDUSTRIES, INC., holds NPDES permit IA0063860. EPA’s file records it issued April 1, 2023 and expiring March 31, 2028.

A.Y. MCDONALD MFG. CO., Dubuque, Iowa: Individual permit IA0063860, held by A.Y. MCDONALD INDUSTRIES, INC.; Effective; issued April 1, 2023, term to March 31, 2028, by STA.

pH: 2 limits, 2 violations of any kind, 1 effluent exceedance, latest November 30, 2024.
Iron, total [as Fe]: 4 limits, 4 violations of any kind, 0 effluent exceedances.
Temperature, water deg. fahrenheit: 24 limits, 2 violations of any kind, 0 effluent exceedances.

A.Y. MCDONALD MFG. CO. among its neighbors

EPA’s permit file holds 7 discharge permits in the Catfish Creek subwatershed (HUC 070600050102), IA0063860 among them. Its county holds 57, 3 of them major permits; IA0063860 is a minor permit.

Other permits in the Catfish Creek subwatershed (HUC 070600050102)

ASBURY, CITY OF MS4, Asbury: IA0078905, minor permit, permit term to January 31, 2020
HICKORY ACRES SUBDIVISION, Dubuque: IA0063991, minor permit, permit term to February 28, 2022
SUPER20 MHC LLC, Dubuque: IA0073334, minor permit, permit term to September 30, 2021
TABLE MOUND MHP, Dubuque: IA0064009, minor permit, permit term to November 24, 2007
TWIN RIDGE SUBDIVISION, Dubuque: IA0061298, minor permit, permit term to March 31, 2024
U.S. ARMY RESERVE CENTER STP, Dubuque: IA0064751, minor permit, permit term to April 21, 2013

Identity

Facility as filed	A.Y. MCDONALD MFG. CO.
Permittee as filed	A.Y. MCDONALD INDUSTRIES, INC.
NPDES ID	IA0063860
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	April 1, 2023
Expiration date	March 31, 2028
Issuing agency	STA
Address	Dubuque, IA 52001
Receiving water impaired	303(D) Listed
Subwatershed	Catfish Creek (HUC 070600050102)
Other EPA IDs (FRS)	RCRA handler IAD980688717; ICIS-AIR source IA0000001906100232

Effluent limits and exceedances

3Pollutants on file
3Under a numeric limit
3With a violation of any kind
1With 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
pH	2	2	1	November 30, 2024
Iron, total [as Fe]	4	4	0
Temperature, water deg. fahrenheit	24	2	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0063860.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0063860.

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 IA0063860.

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

This public-records page covers NPDES permit IA0063860, a Clean Water Act discharge permit for A.Y. MCDONALD MFG. CO. in Dubuque, IA, held by A.Y. MCDONALD INDUSTRIES, INC. The permit is listed as Effective with a Minor Discharger class, and the file shows 1 pollutant with an effluent exceedance among 3 pollutants on file, all 3 of which are under a numeric limit. The receiving water is listed as impaired (303(D)) and the subwatershed is Catfish Creek (HUC 070600050102).