Know Your Environment. Protect Your Health.

Trichloroacetic acid

Dean Dale Special Utility District

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)

37

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.15 ppb881.50 ppb - 3.00 ppb
20195.39 ppb882.60 ppb - 9.80 ppb
20201.93 ppb881.40 ppb - 2.40 ppb
20211.46 ppb86ND - 2.30 ppb
20220.350 ppb82ND - 1.40 ppb
20230.725 ppb85ND - 1.30 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
2018-02-28Q18084450062.20 ppb
2018-02-28Q18084450012.20 ppb
2018-05-09Q18191940041.70 ppb
2018-05-09Q18191940021.50 ppb
2018-08-23Q18340010031.80 ppb
2018-08-23Q18340010042.10 ppb
2018-11-13Q18457210012.70 ppb
2018-11-13Q18457210033.00 ppb
2019-01-29Q19044400034.00 ppb
2019-01-29Q19044400084.10 ppb
2019-05-16Q19265630034.70 ppb
2019-05-16Q19265630045.10 ppb
2019-08-20Q19573810043.50 ppb
2019-08-20Q19573810032.60 ppb
2019-11-21Q19777880039.80 ppb
2019-11-21Q19777880049.30 ppb
2020-03-03Q20079780081.50 ppb
2020-03-03Q20079780091.40 ppb
2020-06-09Q20232200022.10 ppb
2020-06-09Q20232200032.40 ppb
2020-09-22Q20375640032.00 ppb
2020-09-30Q20384690012.00 ppb
2020-11-30Q20471890012.00 ppb
2020-11-30Q20471890022.00 ppb
2021-03-10Q21063770032.30 ppb
2021-03-10Q21063770042.00 ppb
2021-06-15Q21156010051.90 ppb
2021-06-15Q21156010061.70 ppb
2021-09-15Q21253220031.80 ppb
2021-09-15Q21253220042.00 ppb
2021-11-02Q2130740003ND
2021-11-02Q2130740004ND
2022-01-20Q2202094007ND
2022-01-20Q2202094008ND
2022-04-12Q22112060011.40 ppb
2022-04-12Q22112060041.40 ppb
2022-07-12Q2219478002ND
2022-07-12Q2219478003ND
2022-10-05Q2230107001ND
2022-10-05Q2230107004ND
2023-02-13Q23055000051.000 ppb
2023-02-13Q2305500006ND
2023-05-10Q23179640031.30 ppb
2023-05-10Q23179640041.20 ppb
2023-08-29Q2337352002ND
2023-08-29Q2337352003ND
2023-10-31Q23465890031.20 ppb
2023-10-31Q23465890041.10 ppb