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National Drinking Water Database


Total haloacetic acids (HAAs) in Washington


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 Washington

502 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)
1Point Roberts Water District NO 4
Point Robert, WA
1,30012 of 1272.67 ppb
(29 to 144 ppb)
2Eatonville Water Dept
Eatonville, WA
2,01214 of 1667.34 ppb
(0 to 169 ppb)
3Roche Harbor Water System Inc
Friday Harbor, WA
32925 of 2567.13 ppb
(48.9 to 124.2 ppb)
4Rainier School
Buckley, WA
45013 of 1367.06 ppb
(12.7 to 129.9 ppb)
5Raymond Water Department
Raymond, WA
2,97011 of 1164.22 ppb
(37.7 to 94.4 ppb)
6Cumberland Coop Water System
Enumclaw, WA
1521 of 162.9 ppb
(62.9 ppb)
7Buckley Water
Buckley, WA
4,53533 of 3352.84 ppb
(4.7 to 115.05 ppb)
8Tamoshan
Olympia, WA
2603 of 350 ppb
(39.8 to 55.3 ppb)
9Hoquiam Water Department
Hoquiam, WA
9,00012 of 1247.47 ppb
(22.9 to 71.9 ppb)
10Boston Harbor
Olympia, WA
8801 of 147 ppb
(47 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 Washington

There are no violations reported for this contaminant in Washington