Water Quality Reports > Phoenix AZ Drinking Water Quality Report
Water Quality Score
Phoenix AZ Drinking Water Quality
Water Quality Factors
  • Failed some Health Guidelines
  • Failed some Legal Limits
  • Failed some Reporting and Monitoring Requirements
  • Uses Chlorine disinfectant

Due to the location and climate of Phoenix, the city has developed a diverse portfolio of water sources to meet the cities needs. These sources include the Salt River Project (SRP), Central Arizona Project (CAP), reclaimed water, and groundwater from the cities wells.

The Central Arizona Project (CAP) delivers water 190 miles from Phoenix at Lake Havasu through a system of canals. The CAP system uses a series of pumps and integral storage reservoirs at Lake Pleasant. Over 1.8 million acre-feet of water is carried each year and accounts for 20% of Phoenix’s water. The Salt River Project (SRP) transfers water from the Verde and Salt River watersheds using a system of six dams, 1,300 miles of canals and 255 high-capacity wells. The SRP accounts for 50% of Phoenix’s water. The final 30% of the city's water comes from wells and recycled water.

By insuring Phoenix's water supplies are diversified, the city can plan for future growth and adequately handle shortages. In recent years arsenic and potentially carcinogenic disinfectant byproducts have exceeded health guidelines.

Phoenix, AZ Drinking Water Top Suppliers

Water SupplierWater Supply SourcePopulation ServedService Connections
Phoenix City Of
Attn Randy Gottler200 W Washington 9th Floor Phoenix, AZ 85003
Surface Water 1,533,582 344,522
Data Sources:
EPA 2012 SDWIS Report

Phoenix, AZ Water Quality Recent Violations

There were no health violations for in the 2010-2012 reporting periods

There were 2 other violations found in Phoenix, AZ by the EPA in the 2010-2012 reporting periods. They are listed in the table below.

Drinking Water Rule or ContaminantDate Violation Last Reported Violation TypeViolationNumber of ViolationsAvg ViolationMax ViolationState Standard Unit of MeasureEnforcement Action
Arsenic 2010-05-06 Monitoring or reporting violation Monitoring, Regular 1 0 Compliance Achieved
Nitrates 2010-05-06 Monitoring or reporting violation Monitoring, Regular 1 0 Compliance Achieved
To see the latest EPA monitoring report for visit the EPA at SDWIS Report

Phoenix, AZ Water Quality Historical Violations

Above Health Limits
Below Limits
ContaminantTotal Tests Positive ResultsAbove Health LimitsAbove Legal LimitsEPA RegulatedMax ResultHealth Limit Legal Limit
Arsenic (total) 138 34 27 6 Yes 16.10 2 10
Total trihalomethanes (TTHMs) 16 10 0 2 Yes 167 - 80
Total haloacetic acids (HAAs) 16 10 1 1 Yes 167 70 60
Lead (total) 60 35 34 0 Yes 13 0.20 15
Alpha particle activity (excl radon and uranium) 6 4 0 0 Yes 3.40 15 15
Alpha particle activity (incl. radon & uranium) 4 1 0 0 Yes 2.40 - 15
Barium (total) 38 34 0 0 Yes 361 2000 2000
Chromium (total) 38 17 0 0 Yes 82.10 100 100
Copper 60 47 0 0 Yes 1100 1300 1300
Di(2-ethylhexyl) phthalate 62 2 0 0 Yes 2.20 300 6
Hexachlorocyclopentadiene 62 1 0 0 Yes 0.11 50 50
Mercury (total inorganic) 38 1 0 0 Yes 0.50 2 2
Nitrate 99 67 0 0 Yes 8.20 10 10

70 Water Contaminants were tested for in the Phoenix, AZ area but not found in drinking water between 2004 and 2009.

Data Source: NYTimes.com

The scores and results above reflect a summary of the historical drinking water testing results that has been documented by the EPA and other sources. The color coding of the symbols was developed by WaterFilterComparisions.com as an easy way for individuals to gauge the historical effectiveness of Phoenix water suppliers in meeting legal and health regulations in providing clean drinking water. This should only be used as a guide, and WaterFilterComparisons recommends you contact Phoenix water suppliers to better understand the quality of the drinking water in Phoenix, .