Know Your Environment. Protect Your Health.

Trichloroacetic acid

Chehalis Water Department

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

74

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201831.0 ppb161624.9 ppb - 39.0 ppb
201931.7 ppb161624.0 ppb - 40.0 ppb
2020N/A00N/A
202125.6 ppb1615ND - 44.0 ppb
202216.9 ppb161611.0 ppb - 26.7 ppb
202313.2 ppb1611ND - 28.0 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
2018-01-1839.0 ppb
2018-01-1834.0 ppb
2018-01-1829.0 ppb
2018-01-1830.0 ppb
2018-04-1834.0 ppb
2018-04-1834.0 ppb
2018-04-1837.0 ppb
2018-06-1425.0 ppb
2018-07-1226.0 ppb
2018-07-1225.9 ppb
2018-07-1228.0 ppb
2018-07-1224.9 ppb
2018-10-1833.2 ppb
2018-10-1835.8 ppb
2018-10-1830.3 ppb
2018-10-1830.5 ppb
2019-01-1024.0 ppb
2019-01-1025.0 ppb
2019-01-1033.0 ppb
2019-01-1040.0 ppb
2019-04-1837.0 ppb
2019-04-1833.0 ppb
2019-04-1835.0 ppb
2019-04-1838.0 ppb
2019-07-1634.0 ppb
2019-07-1633.0 ppb
2019-07-1630.0 ppb
2019-07-1630.0 ppb
2019-10-1626.0 ppb
2019-10-1634.0 ppb
2019-10-1626.0 ppb
2019-10-1629.0 ppb
2021-01-07406066344.0 ppb
2021-01-07406066534.0 ppb
2021-01-07406066637.0 ppb
2021-01-07406066437.0 ppb
2021-04-20410947917.0 ppb
2021-04-20410948115.0 ppb
2021-04-20410947817.0 ppb
2021-04-20410948015.0 ppb
2021-07-15414638019.0 ppb
2021-07-15414637824.0 ppb
2021-07-15414637921.0 ppb
2021-07-154146381ND
2021-10-29420723635.0 ppb
2021-10-29420723433.0 ppb
2021-10-29420723529.0 ppb
2021-10-29420723333.0 ppb
2022-01-10423358926.7 ppb
2022-01-10423359225.0 ppb
2022-01-10423359025.9 ppb
2022-01-10423359124.5 ppb
2022-04-06426635616.0 ppb
2022-04-06426635516.0 ppb
2022-04-06426635716.0 ppb
2022-04-06426635418.0 ppb
2022-07-20431161813.0 ppb
2022-07-20431162113.0 ppb
2022-07-20431161912.0 ppb
2022-07-20431161712.0 ppb
2022-10-12436843414.0 ppb
2022-10-12436843511.0 ppb
2022-10-12436843314.0 ppb
2022-10-12436843214.0 ppb
2023-01-0544002335.70 ppb
2023-01-05440023116.0 ppb
2023-01-054400232ND
2023-01-05440023028.0 ppb
2023-04-104445054ND
2023-04-104445048ND
2023-04-104445050ND
2023-04-104445052ND
2023-07-14449232520.0 ppb
2023-07-14449232720.0 ppb
2023-07-14449232619.0 ppb
2023-07-14449232815.0 ppb
2023-10-06453309922.0 ppb
2023-10-06453309822.0 ppb
2023-10-06453309722.0 ppb
2023-10-06453309622.0 ppb