Clean Water Act discharge permit · NPDES AZS000002
PIMA COUNTY MS4, AZ: NPDES AZS000002 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
PIMA COUNTY MS4, held by PIMA COUNTY, holds NPDES permit AZS000002. EPA’s file records it issued December 21, 2020 and expiring June 30, 2026. 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 PIMA COUNTY MS4: 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 AZS000002.
Identity
| Facility as filed | PIMA COUNTY MS4 |
|---|---|
| Permittee as filed | PIMA COUNTY |
| NPDES ID | AZS000002 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Large municipal storm sewer systems |
| Issued | December 21, 2020 |
| Expiration date | June 30, 2026 |
| Address | AZ 85743 |
| Subwatershed | West Branch Santa Cruz River (HUC 150503010903) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
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 AZS000002.
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 AZS000002.
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, AZS000002.
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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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 AZS000002 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.