Clean Water Act discharge permit · NPDES AZC113707

ESPERERO WASH, AZ: NPDES AZC113707 discharge permit, effluent exceedances, inspections, penalties

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

ESPERERO WASH, held by The Ashton Company, Inc., Contractors And Engineers, holds NPDES permit AZC113707, which discharges to Ventana Canyon Wash. EPA’s file records it issued December 1, 2025 and expiring August 28, 2030.

ESPERERO WASH, Arizona: Coverage under a general permit AZC113707, held by The Ashton Company, Inc., Contractors And Engineers; Effective; issued December 1, 2025, term to August 28, 2030, by ADEQ; discharges to Ventana Canyon Wash.

Other permits held by The Ashton Company, Inc., Contractors And Engineers

WINCHESTER SUBSTATION: AZC106483, issued December 11, 2024
NOGALES INTERNATIONAL AIRPORT, Nogales: AZC110381, issued August 5, 2025
RIO RICO SWITCHYARD SUBSTATION, Rio Rico: AZC113449, issued November 10, 2025
REHABILITATE PARK AVE PHASE 1: AZC115945, issued April 24, 2026
KIPPER SUBSTATION AND TRANSMISSION LINE: AZC117085, issued July 24, 2026

ESPERERO WASH among its neighbors

EPA’s permit file holds 7 discharge permits in the Lower Tanque Verde Creek subwatershed (HUC 150503020306), AZC113707 among them.

Other permits in the Lower Tanque Verde Creek subwatershed (HUC 150503020306)

COTTONWOOD VISTAS, Tucson: AZCN92505, minor permit, permit term to June 30, 2025
ESPERERO WASH AT SUNRISE DRIVE CULVERT, Unknown: AZC113953, minor permit, permit term to August 28, 2030
HOUGHTON PI - UNDERGROUND 2025, Unknown: AZC106717, minor permit, permit term to June 30, 2025
SAHUARO HIGH SCHOOL, Tucson: AZC115935, minor permit, discharging to Sabino Creek | Below 32°23'20 /110°47'06 -, permit term to August 28, 2030
TUCSON SPEEDWAY SELF STORAGE, Tucson: AZC105162, minor permit, permit term to June 30, 2025
VENTANA HEIGHTS, Unknown: AZCN84563, minor permit, permit term to June 30, 2025

What the register holds for ESPERERO WASH: its NPDES ID, its permit type and status, its dates, its address, Arizona, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES AZC113707.

Identity

Facility as filed	ESPERERO WASH
Permittee as filed	The Ashton Company, Inc., Contractors And Engineers
NPDES ID	AZC113707
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	December 1, 2025
Expiration date	August 28, 2030
Issuing agency	ADEQ
Address	AZ 85713
Receiving water	Ventana Canyon Wash
Subwatershed	Lower Tanque Verde Creek (HUC 150503020306)

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES AZC113707.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES AZC113707.

Inspections

EPA’s inspection file holds no inspection for NPDES AZC113707.

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 AZC113707.

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Nearby on the register

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

This public-records page covers Clean Water Act NPDES permit AZC113707 for ESPERERO WASH in Arizona, held by The Ashton Company, Inc., Contractors And Engineers and discharging to Ventana Canyon Wash. The listed figures are 0 minor discharger class, 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit issued December 1, 2025 and expiring August 28, 2030.