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National Drinking Water Database


Total haloacetic acids (HAAs) in Arizona


Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid. [read more]

The Most Polluted Communities in Arizona

186 water utilities reported detecting Total haloacetic acids (HAAs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Total haloacetic acids (HAAs) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Usfs-Knf-Tusayan Admin
Williams, AZ
802 of 241.05 ppb
(6 to 76.1 ppb)
2Mohawk Utility Co
Wellton, AZ
2501 of 134.2 ppb
(34.2 ppb)
3City of Flagstaff
Flagstaff, AZ
41,20014 of 2031.46 ppb
(0 to 115 ppb)
4Ehrenberg Improvement Assn
Ehrenberg, AZ
1,6501 of 122.6 ppb
(22.6 ppb)
5Cave Creek Water Co
Cave Creek, AZ
3,90021 of 2921.16 ppb
(0 to 137.8 ppb)
6Marina Village
Bakersfield, AZ
5542 of 419.83 ppb
(0 to 54.1 ppb)
7City of Tolleson
Tolleson, AZ
4,43812 of 1819.37 ppb
(0 to 88.33 ppb)
8City of Tempe
Tempe, AZ
160,00013 of 2018.64 ppb
(0 to 58 ppb)
9Far West Water Co
Yuma, AZ
32,42535 of 3718.55 ppb
(0 to 56 ppb)
10City of Chandler
Chandler, AZ
180,00013 of 1818.39 ppb
(0 to 46.69 ppb)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.70 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.450 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb

Violation Summary for Total haloacetic acids (HAAs) in Arizona

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Arizona since 2004

Violation TypeNumber of Violations
Monitoring and Reporting Disinfection Byproduct Rule1,002
Over maximum contaminant level, Average13