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Clean Water Act discharge permit · NPDES AZC110990

MESA SIGNAL BUTTE WATER TREATMENT PLANT, Mesa, AZ: NPDES AZC110990 discharge permit, effluent exceedances, inspections, penalties

MESA SIGNAL BUTTE WATER TREATMENT PLANT, held by McCarthy Building Companies, Inc., holds NPDES permit AZC110990, which discharges to Siphon Draw | Superstition Mountains Wwtp Outf. EPA’s file records it issued August 29, 2025 and expiring August 28, 2030.

MESA SIGNAL BUTTE WATER TREATMENT PLANT, Mesa, Arizona: Coverage under a general permit AZC110990, held by McCarthy Building Companies, Inc.; Effective; issued August 29, 2025, term to August 28, 2030, by ADEQ; discharges to Siphon Draw | SUPERSTITION MOUNTAINS WWTP OUTF.

Other permits held by McCarthy Building Companies, Inc.

MESA SIGNAL BUTTE WATER TREATMENT PLANT among its neighbors

EPA’s permit file holds 42 discharge permits in the Siphon Draw subwatershed (HUC 150501000803), AZC110990 among them. Its county holds 618, 31 of them major permits; AZC110990 is a minor permit.

Other permits in the Siphon Draw subwatershed (HUC 150501000803)

What the register holds for MESA SIGNAL BUTTE WATER TREATMENT PLANT: its NPDES ID, its permit type and status, its dates, its address in Mesa, Arizona, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES AZC110990.

Identity

Facility as filedMESA SIGNAL BUTTE WATER TREATMENT PLANT
Permittee as filedMcCarthy Building Companies, Inc.
NPDES IDAZC110990
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedAugust 29, 2025
Expiration dateAugust 28, 2030
Issuing agencyADEQ
AddressMesa, AZ 85212
Receiving waterSiphon Draw | SUPERSTITION MOUNTAINS WWTP OUTF
SubwatershedSiphon Draw (HUC 150501000803)
Other EPA IDs (FRS)RCRA handler AZR000522177

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES AZC110990.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES AZC110990.

Inspections

EPA’s inspection file holds no inspection for NPDES AZC110990.

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 AZC110990.

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, AZC110990.

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  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
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Nearby on the register

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

What this page shows

The MESA SIGNAL BUTTE WATER TREATMENT PLANT, a Mesa, Arizona general permit coverage under NPDES ID AZC110990 issued to McCarthy Building Companies, Inc., is one of 350 general permit coverages on EPA's register in Maricopa County, and it sits among 42 NPDES permits in the Siphon Draw subwatershed. Of those 350 Maricopa County coverages, 0.0% have a violation on file, and 80.9% of them carry an earlier issue date than this permit's August 29, 2025 issuance.