Clean Water Act discharge permit · NPDES AZI108378
CEMEX - GRAY MOUNTAIN PLANT, AZ: NPDES AZI108378 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 1Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
CEMEX - GRAY MOUNTAIN PLANT, held by Cemex Construction Materials South, Llc, holds NPDES permit AZI108378, which discharges to Mays Wash | Headwaters - Little Colorado River. EPA’s file records it issued January 16, 2025 and expiring January 15, 2030. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for CEMEX - GRAY MOUNTAIN PLANT: its NPDES ID, its permit type and status, its dates, its address, Arizona, its receiving water, and 1 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES AZI108378.
Identity
| Facility as filed | CEMEX - GRAY MOUNTAIN PLANT |
|---|---|
| Permittee as filed | Cemex Construction Materials South, Llc |
| NPDES ID | AZI108378 |
| 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 | AZ 85260 |
| Receiving water | Mays Wash | Headwaters - LITTLE COLORADO RIVER |
| Subwatershed | Rimmy Jim Tank (HUC 150200160804) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 1Pollutants on file
- 1Under 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES AZI108378.
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES AZI108378.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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, AZI108378.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID AZI108378 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.