Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Rule

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.600 ppb83ND - 2.10 ppb
20190.950 ppb85ND - 2.00 ppb
2020ND80ND
2021ND80ND
2022ND80ND
2023ND80ND

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
2018-03-01Q18085950021.000 ppb
2018-03-01Q1808595001ND
2018-05-29Q1821223007ND
2018-05-29Q1821223002ND
2018-09-11Q1835796002ND
2018-09-11Q1835796003ND
2018-11-29Q18487410011.70 ppb
2018-11-29Q18487410022.10 ppb
2019-02-28Q1908748007ND
2019-02-28Q19087480081.20 ppb
2019-05-21Q19273040021.000 ppb
2019-05-21Q19273040032.00 ppb
2019-08-22Q19585550031.50 ppb
2019-08-22Q19585550021.90 ppb
2019-12-10Q1979532002ND
2019-12-10Q1979532003ND
2020-03-02Q2007740003ND
2020-03-02Q2007740004ND
2020-05-28Q2021173001ND
2020-05-28Q2021173003ND
2020-09-01Q2034855002ND
2020-09-01Q2034855003ND
2020-12-02Q2048097001ND
2020-12-02Q2048097002ND
2021-03-09Q2106058004ND
2021-03-09Q2106058005ND
2021-05-20Q2113234006ND
2021-05-20Q2113234007ND
2021-08-25Q2123193002ND
2021-08-25Q2123193003ND
2021-11-15Q2131744002ND
2021-11-15Q2131744003ND
2022-03-03Q2207478003ND
2022-03-03Q2207478004ND
2022-05-25Q2215195006ND
2022-05-25Q2215195007ND
2022-09-08Q2226790002ND
2022-09-08Q2226790003ND
2022-11-29Q2235392002ND
2022-11-29Q2235392003ND
2023-03-14Q2310048002ND
2023-03-14Q2310048003ND
2023-05-17Q2318616004ND
2023-05-17Q2318616005ND
2023-08-24Q2336189002ND
2023-08-24Q2336189003ND
2023-11-16Q2349371002ND
2023-11-16Q2349371003ND