The Power of Information

National Drinking Water Database


Trichloroacetic acid in Alaska


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 Alaska

150 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)
1Thorne Bay
Thorne Bay, AK
95719 of 19120.79 ppb
(3.7 to 172 ppb)
2Gulkana Village
Gakona, AK
8312 of 13111.75 ppb
(0 to 176 ppb)
3Vallenar View Mobile Home Park
Ketchikan, AK
22515 of 1584.51 ppb
(1.29 to 166 ppb)
4Kake Municipal Water
Kake, AK
83314 of 1467.71 ppb
(24 to 130 ppb)
5Saxman
Ketchikan, AK
45014 of 1567.69 ppb
(0 to 153 ppb)
6Mountain Point Service Area
Ketchikan, AK
97516 of 1866.56 ppb
(0 to 141 ppb)
7Chalkyitsik Village Water
Chalkyitsik, AK
11013 of 1465.86 ppb
(0 to 162 ppb)
8Kasaan
Ketchikan, AK
469 of 965.47 ppb
(21 to 146 ppb)
9Golovin Community Water System
Golovin, AK
1507 of 762.59 ppb
(8.92 to 116 ppb)
10Unalakleet City Water Supply
Unalakleet, AK
75711 of 1155.91 ppb
(14.2 to 93.6 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 Alaska

There are no violations reported for this contaminant in Alaska