waterbycounty

Arizona Water Quality

Drinking water data for all 15 counties.

Avg Water Score

99.4

State Grade

A

Counties with Data

15

of 15 total

All Arizona Counties

CountyWater Score
Maricopa County100.0
Pima County99.9
Apache County99.8
Coconino County99.8
Graham County99.8
Santa Cruz County99.8
Pinal County99.7
Mohave County99.6
Navajo County99.6
Cochise County99.5
Yavapai County99.3
Gila County99.2
Yuma County99.1
La Paz County98.4
Greenlee County96.8

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Data Source

Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

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