Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Knox City

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)

36

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.06 ppb881.30 ppb - 3.50 ppb
20191.70 ppb881.000 ppb - 2.90 ppb
20200.863 ppb85ND - 2.00 ppb
20211.46 ppb87ND - 2.80 ppb
20220.863 ppb86ND - 1.40 ppb
20230.288 ppb82ND - 1.20 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
2018-02-13Q18063640022.30 ppb
2018-02-13Q18063640011.80 ppb
2018-05-15Q18197760031.60 ppb
2018-05-15Q18197760011.70 ppb
2018-09-10Q18356530011.30 ppb
2018-09-10Q18356530021.30 ppb
2018-11-19Q18471890013.50 ppb
2018-11-19Q18471890023.00 ppb
2019-03-07Q19098650012.40 ppb
2019-03-07Q19098650022.90 ppb
2019-05-14Q19258100011.80 ppb
2019-05-14Q19258100022.00 ppb
2019-09-10Q19634300031.20 ppb
2019-09-10Q19634300021.20 ppb
2019-11-06Q19759140011.10 ppb
2019-11-06Q19759140021.000 ppb
2020-03-10Q2009548001ND
2020-03-10Q2009548002ND
2020-05-28Q2021181002ND
2020-05-28Q20211810031.90 ppb
2020-09-15Q20365090012.00 ppb
2020-09-15Q20365090021.000 ppb
2020-12-02Q20481010011.000 ppb
2020-12-02Q20481010021.000 ppb
2021-03-01Q21051260011.20 ppb
2021-03-01Q2105126002ND
2021-05-18Q21129650011.30 ppb
2021-05-18Q21129650021.70 ppb
2021-08-24Q21229740022.80 ppb
2021-08-24Q21229740032.40 ppb
2021-11-16Q21320100011.10 ppb
2021-11-16Q21320100021.20 ppb
2022-03-02Q2207235001ND
2022-03-02Q2207235002ND
2022-05-24Q22150580021.40 ppb
2022-05-24Q22150580031.30 ppb
2022-09-07Q22266080011.000 ppb
2022-09-07Q22266080021.000 ppb
2022-11-15Q22343000011.20 ppb
2022-11-15Q22343000021.000 ppb
2023-03-08Q2309182001ND
2023-03-08Q2309182002ND
2023-05-16Q23184090011.10 ppb
2023-05-16Q23184090021.20 ppb
2023-09-05Q2338001002ND
2023-09-05Q2338001003ND
2023-11-28Q2350600001ND
2023-11-28Q2350600002ND