# SDWA PWS U.S. Army Garrison Yuma Proving Ground/Material Testing Area (AZ0414363)
> **Administrative - Formal** · FY2010 · — · Unilateral Administrative Order Without Adjudication
## Case
- **Activity ID:** `1800105651`
- **Case Number:** 09-2010-6022
- **Type:** Administrative - Formal
- **Lead:** EPA
- **Outcome:** Unilateral Administrative Order Without Adjudication
- **Penalty assessed:** —
- **Cost recovery:** —
- **Compliance action $:** —
- **Multimedia (multi-env):** —
## Defendants
- U.S. Army Garrison Yuma Proving Ground (settlement)
## Summary

U.S. Army Garrison Yuma Proving Ground Material Testing Area public water system (PWS ID No. AZ0414363) failed to meet the drinking water maximum contaminant level ( MCL ) for arsenic since June 2007. EPA Region 9 administrative order requires the U.S. Army Garrison to provide EPA Region 9 with plans and schedules to meet the arsenic MCL by June 2012.

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*Source: [EPA ECHO](https://echo.epa.gov/) · AI Analytics · CC0 1.0*