Clean Water Act discharge permit · NPDES AZC106483
WINCHESTER SUBSTATION, AZ: NPDES AZC106483 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
WINCHESTER SUBSTATION, held by The Ashton Company, Inc., Contractors And Engineers, holds NPDES permit AZC106483. EPA’s file records it issued December 11, 2024 and expiring June 30, 2025.
WINCHESTER SUBSTATION, Arizona: Coverage under a general permit AZC106483, held by The Ashton Company, Inc., Contractors And Engineers; Administratively continued (past its expiration date and still in force until reissued); issued December 11, 2024, term to June 30, 2025.
Other permits held by The Ashton Company, Inc., Contractors And Engineers
- NOGALES INTERNATIONAL AIRPORT, Nogales: AZC110381, issued August 5, 2025
- RIO RICO SWITCHYARD SUBSTATION, Rio Rico: AZC113449, issued November 10, 2025
- ESPERERO WASH: AZC113707, issued December 1, 2025
- REHABILITATE PARK AVE PHASE 1: AZC115945, issued April 24, 2026
- KIPPER SUBSTATION AND TRANSMISSION LINE: AZC117085, issued July 24, 2026
WINCHESTER SUBSTATION among its neighbors
EPA’s permit file holds 1 discharge permits in the Lower Tres Alamos Wash subwatershed (HUC 150502020803), AZC106483 among them.
What the register holds for WINCHESTER SUBSTATION: its NPDES ID, its permit type and status, its dates, its address, Arizona. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES AZC106483.
Identity
| Facility as filed | WINCHESTER SUBSTATION |
|---|---|
| Permittee as filed | The Ashton Company, Inc., Contractors And Engineers |
| NPDES ID | AZC106483 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 11, 2024 |
| Expiration date | June 30, 2025 |
| Address | AZ 85318 |
| Subwatershed | Lower Tres Alamos Wash (HUC 150502020803) |
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 AZC106483.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES AZC106483.
Inspections
EPA’s inspection file holds no inspection for NPDES AZC106483.
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 AZC106483.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, AZC106483.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.