WaterQ

City Water Quality Rankings in Arizona

121 cities ranked by drinking water quality.

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Popular city water quality comparisons

Alpine, AZ vs Sahuarita, AZ Compare → Peridot, AZ vs Tempe, AZ Compare → Happy Jack, AZ vs Littlefield, AZ Compare → Mayer, AZ vs Surprise, AZ Compare →

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#1
Alpine
County, AZ
98 A
#2
Sahuarita
County, AZ
96 A
#3
Peridot
County, AZ
91 A
#4
Tempe
County, AZ
91 A
#5
Happy Jack
County, AZ
90 A
#6
Littlefield
County, AZ
88 B
#7
Mayer
County, AZ
88 B
#8
Surprise
County, AZ
88 B
#9
Sells
County, AZ
87 B
#10
Dewey
County, AZ
84 B
#11
Paulden
County, AZ
84 B
#12
Morenci
County, AZ
83 B
#13
Tonopah
County, AZ
83 B
#14
Clarkdale
County, AZ
82 B
#15
Congress
County, AZ
82 B
#16
Oro Valley
County, AZ
82 B
#17
Benson
County, AZ
81 B
#18
Colorado City
County, AZ
80 B
#19
Lake Havasu City
County, AZ
80 B
#20
Golden Valley
County, AZ
77 B
#21
Petrified Forest
County, AZ
76 B
#22
Avondale
County, AZ
75 B
#23
Maricopa
County, AZ
75 B
#24
Ajo
County, AZ
74 C

Frequently Asked Questions

How are city water quality rankings calculated in Arizona?

WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.

Can I compare two cities in Arizona?

Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.

How often does WaterQ refresh city data?

City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.

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