Know Your Environment. Protect Your Health.

Trichloroacetic acid

Westbound Water Supply Corporation Cisco Source

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.

 

46

Samples

0

Samples exceeding legal limit (MCL)

37

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201810.4 ppb881.10 ppb - 27.3 ppb
201911.8 ppb882.40 ppb - 71.2 ppb
20204.96 ppb881.000 ppb - 19.0 ppb
20215.35 ppb63ND - 29.0 ppb
202211.6 ppb881.80 ppb - 22.0 ppb
20230.338 ppb82ND - 1.70 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
2018-03-01Q180871800214.4 ppb
2018-03-01Q180871800114.2 ppb
2018-05-24Q182099100227.3 ppb
2018-05-24Q182099100122.3 ppb
2018-08-29Q18347180011.50 ppb
2018-08-29Q18347180021.50 ppb
2018-11-28Q18483120091.10 ppb
2018-11-28Q18483120101.20 ppb
2019-01-17Q19028150013.40 ppb
2019-01-17Q19028150022.60 ppb
2019-05-23Q192816300171.2 ppb
2019-05-23Q19281630025.20 ppb
2019-09-18Q19666150013.10 ppb
2019-09-18Q19666150023.30 ppb
2019-12-17Q19803570102.40 ppb
2019-12-17Q19803570112.90 ppb
2020-03-05Q20084430011.50 ppb
2020-03-05Q20084430021.70 ppb
2020-06-04Q20223590111.20 ppb
2020-06-04Q20223590121.30 ppb
2020-09-14Q20363440011.000 ppb
2020-09-14Q20363440021.000 ppb
2020-11-09Q204363100213.0 ppb
2020-11-09Q204363100119.0 ppb
2021-02-09Q2103863009ND
2021-02-09Q2103863010ND
2021-05-10Q21119010012.10 ppb
2021-05-10Q2111901002ND
2021-09-21Q212579200129.0 ppb
2021-09-21Q21257920021.000 ppb
2022-02-16Q220576501020.8 ppb
2022-02-16Q220576501121.7 ppb
2022-05-03Q221311400121.0 ppb
2022-05-03Q221311400222.0 ppb
2022-08-11Q22233400012.00 ppb
2022-08-11Q22233400021.80 ppb
2022-10-18Q22317450011.80 ppb
2022-10-18Q22317450021.80 ppb
2023-02-07Q2304671004ND
2023-02-07Q2304671005ND
2023-04-18Q2314273001ND
2023-04-18Q2314273002ND
2023-07-12Q2327347012ND
2023-07-12Q2327347013ND
2023-12-05Q23516440011.70 ppb
2023-12-05Q23516440021.000 ppb