Clean Water Act discharge permit · NPDES AZI107553

NELSON ENGINEERING CO, Phoenix, AZ: NPDES AZI107553 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
5Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

NELSON ENGINEERING CO, held by Nelson Engineering Co., holds NPDES permit AZI107553, which discharges to Salt River | Tempe Town Lake Dam - I-10 Bridge. EPA’s file records it issued January 16, 2025 and expiring January 15, 2030.

NELSON ENGINEERING CO, Phoenix, Arizona: Coverage under a general permit AZI107553, held by Nelson Engineering Co.; Industrial stormwater; Effective; issued January 16, 2025, term to January 15, 2030, by ADEQ; discharges to Salt River | TEMPE TOWN LAKE DAM - I-10 BRIDGE.

Nitrite + Nitrate total [as N]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Chromium, total dry weight [as Cr]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Iron, total [as Fe]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Zinc, total [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
Hardness, total [as CaCO3]: 2 limits, 0 violations of any kind, 0 effluent exceedances.

Arizona holds 720 Industrial stormwater coverages of this permit type in EPA’s file; 8 were issued before AZI107553. Nelson Engineering Co. holds 2 permits in Arizona.

Other permits held by Nelson Engineering Co.

NELSON ENGINEERING CO, Phoenix: AZMS81009, issued February 25, 2020

Coverages issued nearest AZI107553

January 16, 2025: RE DARLING CO INC, Tucson, AZI107535, held by R. E. Darling Co., Inc.
January 16, 2025: BIRD ACQUISITION, LLC, D/B/A AEROGUARD FLIGHT TRAINING CENTER, Phoenix, AZI107536, held by Bird Acquisition Llc Dba Aeroguard Flight Training Center
January 16, 2025: ERMC AVIATION LLC - PHX, Phoenix, AZI107539, held by Ermc Aviation Llc
January 16, 2025: SA RECYCLING-MIRACLE MILE, Tucson, AZI107549, held by Sa Recycling Llc
January 16, 2025: RS WARBIRDS LLC, Phoenix, AZI107550, held by Rsw Group Llc
January 16, 2025: CEMEX - 20TH STREET READY MIX PLANT, Yuma, AZI107554, held by Cemex Construction Materials South, Llc
January 16, 2025: CEMEX - SIERRA VISTA PLANT, Sierra Vista, AZI107557, held by Cemex Construction Materials South, Llc
January 16, 2025: CEMEX - NUGGET PLANT, Globe, AZI107561, held by Cemex Construction Materials South, Llc
January 16, 2025: CEMEX - BIXBY RD - GLOBE, Globe, AZI107562, held by Cemex Construction Materials South, Llc
January 16, 2025: UNIFI AVIATION, Phoenix, AZI107565, held by Unifi Aviation, Llc

NELSON ENGINEERING CO among its neighbors

EPA’s permit file holds 542 discharge permits in the City of Phoenix-Salt River subwatershed (HUC 150601060305), AZI107553 among them. Its county holds 618, 31 of them major permits; AZI107553 is a minor permit.

Other permits in the City of Phoenix-Salt River subwatershed (HUC 150601060305)

1-B3 BPS REHABILITATION AND REPLACEMENT, Unknown: AZC099991, minor permit, permit term to June 30, 2025
10TH AND BASELINE MULTIFAMILY, Unknown: AZC116415, minor permit, discharging to Western Canal | Kiwanis Park - 51ST AVE @ 33°, permit term to August 28, 2030
115-30-005, Phoenix: AZI116650, minor permit, discharging to Salt River | TEMPE TOWN LAKE DAM - I-10 BRIDGE, permit term to January 15, 2030
1405 W BROADWAY RD AUTO, Phoenix: AZC114777, minor permit, permit term to August 28, 2030
15TH AVENUE COMMERCIAL PIT, Phoenix: AZI108873, minor permit, discharging to Salt River | I-10 BRIDGE - 23RD AVENUE WWTP @, permit term to January 15, 2030
15TH AVENUE COMMERCIAL PIT, Phoenix: AZMS81150, minor permit, permit term to December 30, 2024
19TH AVENUE HMA PLANT, Phoenix: AZMS67702, minor permit, permit term to December 3, 2020
20423-05 GRAND CANAL MUT INDIAN SCHOOL TO 16TH ST, Unknown: AZC116185, minor permit, discharging to Grand Canal | CROSS CUT CANAL - 67TH AVENUE @, permit term to August 28, 2030
23RD AVENUE WASTEWATER TREATMENT PLANT, Phoenix: AZMS66154, minor permit, permit term to June 6, 2016
2600-04 PSHIA T3 N2, Unknown: AZC116232, minor permit, discharging to Salt River | TEMPE TOWN LAKE DAM - I-10 BRIDGE, permit term to August 28, 2030

What the register holds for NELSON ENGINEERING CO: its NPDES ID, its permit type and status, its dates, its address in Phoenix, Arizona, its receiving water, and 5 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES AZI107553.

Identity

Facility as filed	NELSON ENGINEERING CO
Permittee as filed	Nelson Engineering Co.
NPDES ID	AZI107553
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	January 16, 2025
Expiration date	January 15, 2030
Issuing agency	ADEQ
Address	Phoenix, AZ 85034
Receiving water	Salt River \| TEMPE TOWN LAKE DAM - I-10 BRIDGE
Subwatershed	City of Phoenix-Salt River (HUC 150601060305)
SIC	3444 – Sheet Metal Work

Effluent limits and exceedances

5Pollutants on file
5Under a numeric limit
0With a violation of any kind
0With 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
Nitrite + Nitrate total [as N]	3	0	0
Chromium, total dry weight [as Cr]	3	0	0
Iron, total [as Fe]	3	0	0
Zinc, total [as Zn]	3	0	0
Hardness, total [as CaCO3]	2	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES AZI107553.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES AZI107553.

Inspections

EPA’s inspection file holds no inspection for NPDES AZI107553.

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 AZI107553.

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Nearby on the register

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

This public-records page covers NPDES permit AZI107553, held by Nelson Engineering Co. in Phoenix, Arizona, which discharges to Salt River | Tempe Town Lake Dam - I-10 Bridge under an industrial stormwater program. The permit is listed as effective and was issued January 16, 2025, expiring January 15, 2030, with 0 pollutants under a numeric limit shown.