Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Arizona Water Quality Reports
Water quality scores for 40 cities in Arizona
Payson
15,929 residents
Bullhead City
41,348 residents
Chandler
275,987 residents
San Luis
35,257 residents
Show Low
11,229 residents
Apache Junction
43,764 residents
Sierra Vista
43,888 residents
Casa Grande
57,318 residents
Maricopa
62,720 residents
Cottonwood
12,284 residents
Lake Havasu City
57,144 residents
Eloy
19,625 residents
Flagstaff
76,831 residents
Tempe
180,587 residents
Peoria
190,985 residents
Florence
26,785 residents
Fountain Hills
25,167 residents
Glendale
248,325 residents
Gilbert
267,918 residents
Somerton
16,301 residents
Yuma
95,548 residents
Douglas
16,094 residents
Coolidge
13,016 residents
Buckeye
85,857 residents
Kingman
32,689 residents
Sahuarita
34,034 residents
Avondale
89,334 residents
Phoenix
1,608,139 residents
Prescott Valley
46,785 residents
Queen Creek
59,519 residents
Marana
51,908 residents
Mesa
504,258 residents
Surprise
143,148 residents
Tucson
542,629 residents
Goodyear
86,840 residents
Prescott
43,376 residents
Paradise Valley
14,502 residents
El Mirage
35,753 residents
Scottsdale
241,361 residents
Nogales
20,103 residents
About Arizona Water Quality
Arizona faces unique water quality challenges due to its desert climate and dependence on limited water resources. The state relies heavily on the Colorado River and groundwater, both of which face quality and quantity concerns. Rapid growth in Phoenix and Tucson areas creates ongoing infrastructure demands.
Based on our analysis of 40 cities in Arizona, the average water quality score is 79/100. 10 cities have water quality scores below 70, indicating potential concerns that residents should be aware of. The highest-rated city is Nogales with a score of 51/100, while Payson has the most room for improvement at 98/100.
Water Sources in Arizona
The Colorado River, delivered through the Central Arizona Project, supplies much of the state. Groundwater from various aquifers supplements surface water. Some communities depend entirely on groundwater. Reclaimed water is increasingly used for non-potable purposes to stretch supplies.
Common Water Contaminants in Arizona
These contaminants have been detected in various Arizona water systems
Arizona Water Regulations
Arizona Department of Environmental Quality oversees drinking water. The state has arsenic standards and has invested in treatment systems for affected communities. Arizona manages water rights and quality through a complex system balancing municipal, agricultural, and environmental needs.
Health Considerations
Arsenic in groundwater is Arizona's most significant natural water quality concern. Some areas have elevated fluoride levels that may cause dental or skeletal fluorosis. Hard water is common throughout the state. Uranium and other naturally occurring radionuclides affect some groundwater sources.
Recommendations for Arizona Residents
Arizona residents in areas with arsenic concerns should use reverse osmosis systems certified for arsenic removal. Consider whole-house softeners for hard water issues. Private well users should test annually for arsenic and other regional contaminants. Stay hydrated but know your water quality.
Frequently Asked Questions About Arizona Water Quality
Is Arizona's tap water safe to drink?
Water quality in Arizona varies by location. Our analysis shows an average score of 79/100 across 40 cities, with 10 cities showing potential concerns. We recommend checking your specific city's water quality report and considering filtration if needed.
What are the main water quality concerns in Arizona?
The most common water quality concerns in Arizona include arsenic (naturally occurring), fluoride (naturally occurring), chromium-6 (natural and industrial). These contaminants can come from natural sources, industrial activities, or aging infrastructure. Review your city's specific report to see which contaminants affect your area.
Should I use a water filter in Arizona?
Whether you need a water filter depends on your specific location and health concerns. With 10 cities in Arizona showing elevated contaminant levels, residents in those areas may benefit from filtration. Look for filters certified by NSF/ANSI to remove the specific contaminants found in your area.
Where can I find my Arizona water quality report?
Public water systems in Arizona are required to provide annual Consumer Confidence Reports (CCRs) to residents. You can usually find your report on your water utility's website, request it by phone, or access it through the EPA's database. Our city-level reports above summarize key information from these official sources.