Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Rochester

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.000 ppb43ND - 1.90 ppb
20191.20 ppb42ND - 3.40 ppb
20200.750 ppb42ND - 2.00 ppb
20210.975 ppb43ND - 1.80 ppb
20220.375 ppb41ND - 1.50 ppb
20231.35 ppb441.30 ppb - 1.40 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
2018-03-21Q18118690041.10 ppb
2018-05-30Q18214830061.000 ppb
2018-09-19Q1837646002ND
2018-12-06Q18499690011.90 ppb
2019-03-05Q19092010071.40 ppb
2019-05-21Q19273030023.40 ppb
2019-08-22Q1958554002ND
2019-12-10Q1979531002ND
2020-03-10Q2009554004ND
2020-05-28Q20211720012.00 ppb
2020-09-15Q20365060021.000 ppb
2020-12-02Q2048098001ND
2021-03-09Q2106057004ND
2021-05-20Q21132350061.000 ppb
2021-09-07Q21241700021.80 ppb
2021-11-16Q21320150021.10 ppb
2022-03-02Q2207241003ND
2022-05-24Q2215063006ND
2022-09-07Q2226613001ND
2022-11-15Q22342960021.50 ppb
2023-03-08Q23091870041.30 ppb
2023-05-16Q23184150021.40 ppb
2023-09-06Q23384550021.30 ppb
2023-11-28Q23506050021.40 ppb