Know Your Environment. Protect Your Health.

Trichloroacetic acid

Harris County Municipal Utility District 344

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.325 ppb41ND - 1.30 ppb
20191.000 ppb42ND - 2.20 ppb
2020ND40ND
20210.500 ppb41ND - 2.00 ppb
20221.31 ppb86ND - 2.50 ppb
20230.713 ppb83ND - 2.30 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
2018-02-26AE153561.30 ppb
2018-06-08AE29203ND
2018-09-12AE39763ND
2018-11-27AE46973ND
2019-02-11AE537541.80 ppb
2019-06-19AE712752.20 ppb
2019-08-26AE80573ND
2019-12-09AE91649ND
2020-02-12AE98099ND
2020-05-11AF10339ND
2020-09-03AF26438ND
2020-11-09AF33694ND
2021-03-04AF45339ND
2021-06-04AF56634ND
2021-08-12AF661712.00 ppb
2021-11-03AF75555ND
2022-02-07AF832431.80 ppb
2022-02-07AF832691.90 ppb
2022-05-13AF969162.20 ppb
2022-05-13AF969172.50 ppb
2022-09-15AG13188ND
2022-09-15AG13217ND
2022-12-22AG227181.10 ppb
2022-12-22AG227191.000 ppb
2023-03-09Q23095660031.70 ppb
2023-03-09Q23095660041.70 ppb
2023-04-27AG38407ND
2023-04-27AG38408ND
2023-07-25AG49991ND
2023-07-25AG499962.30 ppb
2023-11-13AG63339ND
2023-11-13AG63342ND