Know Your Environment. Protect Your Health.

Trichloroacetic acid

North Castle Water District #4

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.820 ppb32ND - 1.41 ppb
20190.407 ppb31ND - 1.22 ppb
20200.333 ppb61ND - 2.00 ppb
20210.630 ppb63ND - 1.68 ppb
20220.185 ppb61ND - 1.11 ppb
20231.19 ppb64ND - 2.52 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
2018-07-23AU15584-DBP2ND
2018-07-23AU15588-DBP21.05 ppb
2018-07-23AU15587-DBP21.41 ppb
2019-07-22AV15320-DBP2ND
2019-07-22AV15319-DBP2ND
2019-07-22AV15321-DBP21.22 ppb
2020-02-25AW03853-DBP2ND
2020-02-25AW03861-DBP2ND
2020-02-25AW03855-DBP2ND
2020-07-13AW13180-DBP2ND
2020-07-22AW13998-DBP22.00 ppb
2020-07-22AW13997-DBP2ND
2021-03-02AX04052-DBP2ND
2021-03-03AX04224-DBP21.000 ppb
2021-03-03AX04226-DBP2ND
2021-07-06AX13097-DBP21.68 ppb
2021-07-23AX14691-DBP2ND
2021-07-23AX14692-DBP21.10 ppb
2022-03-01AY03618-DBP2ND
2022-03-01AY03616-DBP2ND
2022-03-01AY03622-DBP2ND
2022-07-19AY12490-DBP2ND
2022-07-25AY12978-DBP21.11 ppb
2022-07-25AY12977-DBP2ND
2023-03-21AZ05017-DBP21.72 ppb
2023-03-21AZ05015-DBP21.36 ppb
2023-03-22AZ05102-DBP2ND
2023-07-25AZ13484-DBP22.52 ppb
2023-07-25AZ13485-DBP2ND
2023-07-25AZ13469-DBP21.52 ppb