# Polacca: health-based drinking water violation (groundwater rule) in First Mesa Consolidated Villages, AZ

**Score:** 75/100

| Field | Value |
|---|---|
| Water system | Polacca |
| PWSID | 090400106 |
| System type | Community water system |
| Owner type | Tribal Government |
| Population served | 3890 |
| Location | First Mesa Consolidated Villages, AZ |
| Contaminant | Groundwater Rule |
| Rule group | Microbial (coliform, E. coli, treatment technique) |
| Compliance period | 2026-06-05 |
| Status | Open |
| Public notice tier | 2 |

## Why this score
- Not yet returned to compliance.
- Serves 3,890 people.
- Community water system.

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) via Envirofacts and EPA ECHO (https://echo.epa.gov/detailed-facility-report?fid=110012930230). Last refreshed: 2026-11-04T06:06:47.254Z.
From EPA SDWIS federal data, which lags state records by up to a quarter. A violation is a regulatory finding about a water system, not a statement about current water quality. Verify with the state drinking water program.