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National Drinking Water Database


Trichloroacetic acid in Washington


Trichloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.

The Most Polluted Communities in Washington

358 water utilities reported detecting Trichloroacetic acid in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Trichloroacetic acid 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 1251.88 ppb
(23 to 93 ppb)
2Eatonville Water Dept
Eatonville, WA
2,01215 of 1751.43 ppb
(0 to 147.5 ppb)
3Rainier School
Buckley, WA
45013 of 1346.39 ppb
(6.6 to 98.3 ppb)
4Raymond Water Department
Raymond, WA
2,97011 of 1139.55 ppb
(21.2 to 63.9 ppb)
5Cumberland Coop Water System
Enumclaw, WA
1521 of 139.5 ppb
(39.5 ppb)
6Roche Harbor Water System Inc
Friday Harbor, WA
32925 of 2537.94 ppb
(19.9 to 69.8 ppb)
7Buckley Water
Buckley, WA
4,53533 of 3335.36 ppb
(2.6 to 78.9 ppb)
8Hoquiam Water Department
Hoquiam, WA
9,00012 of 1233.03 ppb
(22.9 to 45.4 ppb)
9Mcneil Island Water
Steilacoom, WA
1,70016 of 1632.93 ppb
(16.5 to 55.9 ppb)
10Evergreen Retreat Mhp
Visalia, WA
391 of 131 ppb
(31 ppb)

Health Based Limits for Trichloroacetic acid

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.20 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.20 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
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.1000 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.3000 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.3000 ppb

Violation Summary for Trichloroacetic acid in Washington

There are no violations reported for this contaminant in Washington