Know Your Environment. Protect Your Health.

Trichloroacetic acid

Tri-water System

Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

64

Samples

0

Samples exceeding legal limit (MCL)

43

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.555 ppb166ND - 1.80 ppb
20190.715 ppb1614ND - 0.950 ppb
20200.878 ppb880.640 ppb - 1.40 ppb
20210.450 ppb84ND - 1.10 ppb
20220.823 ppb87ND - 1.10 ppb
20230.435 ppb84ND - 0.890 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-26353766010010.940 ppb
2018-02-2635376601002ND
2018-02-2635376601002ND
2018-02-26353766010010.940 ppb
2018-05-29353952080021.70 ppb
2018-05-29353952080011.80 ppb
2018-05-29353952080021.70 ppb
2018-05-29353952080011.80 ppb
2018-08-1635412064001ND
2018-08-1635412064002ND
2018-08-1635412064001ND
2018-08-1635412064002ND
2018-11-1935432392001ND
2018-11-1935432392001ND
2018-11-1935432392002ND
2018-11-1935432392002ND
2019-02-25354509600010.950 ppb
2019-02-25354509600020.950 ppb
2019-02-25354509600010.950 ppb
2019-02-25354509600020.950 ppb
2019-05-20354702210010.940 ppb
2019-05-20354702210020.850 ppb
2019-05-20354702210010.940 ppb
2019-05-20354702210020.850 ppb
2019-08-19354924050020.680 ppb
2019-08-1935492405001ND
2019-08-1935492405001ND
2019-08-19354924050020.680 ppb
2019-11-19355140770010.700 ppb
2019-11-19355140770020.650 ppb
2019-11-19355140770020.650 ppb
2019-11-19355140770010.700 ppb
2020-02-18355324540021.40 ppb
2020-02-18355324540011.20 ppb
2020-05-20355519650010.680 ppb
2020-05-20355519650020.700 ppb
2020-08-17355722670010.860 ppb
2020-08-17355722670020.810 ppb
2020-11-09355919220010.730 ppb
2020-11-09355919220020.640 ppb
2021-03-1235618937001ND
2021-03-1235618937002ND
2021-05-17356349800010.780 ppb
2021-05-17356349800020.790 ppb
2021-08-1235655890001ND
2021-08-1235655890002ND
2021-11-29356805430010.930 ppb
2021-11-29356805430021.10 ppb
2022-02-14356982740021.000 ppb
2022-02-14356982740010.920 ppb
2022-05-0235715968002ND
2022-05-02357159680010.630 ppb
2022-08-08357395230010.930 ppb
2022-08-08357395230021.000 ppb
2022-11-07357588670011.000 ppb
2022-11-07357588670021.10 ppb
2023-02-14357806950010.870 ppb
2023-02-14357806950020.890 ppb
2023-05-0135797755001ND
2023-05-0135797755002ND
2023-08-1435821940001ND
2023-08-1435821940002ND
2023-11-06358408610010.880 ppb
2023-11-06358408610020.840 ppb