Know Your Environment. Protect Your Health.

Trichloroacetic acid

Columbia Heights Water District

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.885 ppb440.850 ppb - 0.920 ppb
20190.335 ppb42ND - 0.670 ppb
20200.960 ppb220.930 ppb - 0.990 ppb
2021ND20ND
20221.10 ppb221.10 ppb
20231.05 ppb221.000 ppb - 1.10 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
2018-06-18353998660010.920 ppb
2018-06-18353998660020.850 ppb
2018-06-18353998660010.920 ppb
2018-06-18353998660020.850 ppb
2019-06-03354739280010.670 ppb
2019-06-0335473928002ND
2019-06-03354739280010.670 ppb
2019-06-0335473928002ND
2020-06-23355592170010.930 ppb
2020-06-23355592170020.990 ppb
2021-06-1635641843001ND
2021-06-1635641843002ND
2022-06-20357278380011.10 ppb
2022-06-20357278380021.10 ppb
2023-06-06358063770011.000 ppb
2023-06-06358063770021.10 ppb