Know Your Environment. Protect Your Health.

Trichloroacetic acid

Lacrosse, City of

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.560 ppb110.560 ppb
20190.310 ppb21ND - 0.620 ppb
2020ND40ND
20210.138 ppb41ND - 0.550 ppb
2022ND40ND
2023ND40ND

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
2018-07-1510063250.560 ppb
2019-07-1512036690.620 ppb
2019-10-141259682ND
2020-01-131309750ND
2020-04-201359994ND
2020-07-121438885ND
2020-10-121595131ND
2021-01-181747939ND
2021-04-181820552ND
2021-07-1118803040.550 ppb
2021-10-191997674ND
2022-01-092128874ND
2022-04-102234512ND
2022-07-102299636ND
2022-10-092377344ND
2023-01-162433199ND
2023-04-092480428ND
2023-07-312547461ND
2023-10-092589845ND