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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

CTWC - Unionville System

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.

MORE ABOUT THIS CONTAMINANT

 

87

Samples

0

Samples exceeding legal limit (MCL)

82

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201414.1 ppb2320ND - 26.0 ppb
2015N/A00N/A
201611.1 ppb1615ND - 19.0 ppb
20179.11 ppb1615ND - 19.0 ppb
201822.1 ppb161616.0 ppb - 25.7 ppb
201919.5 ppb16162.80 ppb - 32.2 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-22BG02299HAA53.70 ppb
2014-01-23BG02294HAA5ND
2014-01-23BG02295HAA519.0 ppb
2014-01-23BG02296HAA5ND
2014-01-23BG02297HAA517.0 ppb
2014-01-23BG02298HAA5ND
2014-01-23BG02300HAA52.10 ppb
2014-01-31BG06718HAA525.0 ppb
2014-01-31BG06717HAA513.0 ppb
2014-01-31BG06716HAA526.0 ppb
2014-01-31BG06715HAA520.0 ppb
2014-04-22BG36625HAA516.0 ppb
2014-04-22BG36626HAA516.0 ppb
2014-04-22BG36627HAA517.0 ppb
2014-04-22BG36628HAA519.0 ppb
2014-07-22BG81008HAA520.0 ppb
2014-07-22BG81009HAA520.0 ppb
2014-07-22BG81010HAA520.0 ppb
2014-07-22BG81011HAA520.0 ppb
2014-10-22BH31461HAA514.0 ppb
2014-10-22BH31460HAA512.0 ppb
2014-10-22BH31459HAA514.0 ppb
2014-10-22BH31458HAA510.00 ppb
2016-01-11BK51264HAA511.0 ppb
2016-01-11BK51265HAA514.0 ppb
2016-01-11BK51263HAA511.0 ppb
2016-01-18BK54312HAA52.90 ppb
2016-04-18BN15772HAA515.0 ppb
2016-04-18BN15773HAA516.0 ppb
2016-04-18BN15774HAA514.0 ppb
2016-04-18BN15775HAA59.00 ppb
2016-07-12BN71240HAA519.0 ppb
2016-07-12BN71241HAA5ND
2016-07-13BN72150HAA519.0 ppb
2016-07-13BN72151HAA513.0 ppb
2016-10-04BV35900HAA52.70 ppb
2016-10-04BV35901HAA58.70 ppb
2016-10-04BV35905HAA511.0 ppb
2016-10-11BV44240HAA512.0 ppb
2017-01-17BX30317HAA59.50 ppb
2017-01-17BX30318HAA58.10 ppb
2017-01-17BX30319HAA59.20 ppb
2017-01-17BX30320HAA59.70 ppb
2017-04-11BY02322HAA513.0 ppb
2017-04-11BY02319HAA59.10 ppb
2017-04-11BY02320HAA56.00 ppb
2017-04-11BY02321HAA511.0 ppb
2017-07-18BY63323HAA515.0 ppb
2017-07-18BY63324HAA5ND
2017-07-18BY63325HAA519.0 ppb
2017-07-18BY63326HAA518.0 ppb
2017-10-24BZ26033HAA51.30 ppb
2017-10-24BZ26034HAA52.50 ppb
2017-10-24BZ26035HAA513.0 ppb
2017-10-24BZ26036HAA51.40 ppb
2018-01-16BZ73286HAA521.0 ppb
2018-01-16BZ73289HAA525.0 ppb
2018-01-16BZ73288HAA522.0 ppb
2018-01-16BZ73287HAA519.0 ppb
2018-04-27CA37381HAA520.0 ppb
2018-04-27CA37382HAA522.0 ppb
2018-04-27CA37383HAA524.0 ppb
2018-04-27CA37384HAA523.0 ppb
2018-07-24CA9673716.0 ppb
2018-07-24CA9673625.0 ppb
2018-07-24CA9673422.0 ppb
2018-07-24CA9673521.0 ppb
2018-10-02DBP 20050766524.6 ppb
2018-10-02DBP 20050766617.8 ppb
2018-10-02DBP 20050766725.1 ppb
2018-10-02DBP 20050802025.7 ppb
2019-01-08DBP 20051813028.0 ppb
2019-01-08DBP 20051813615.1 ppb
2019-01-08DBP 20051813927.2 ppb
2019-01-08DBP 20051814332.2 ppb
2019-04-09DBP 2005278472.80 ppb
2019-04-09DBP 2005278493.50 ppb
2019-04-09DBP 20052784828.8 ppb
2019-04-09DBP 2005278464.10 ppb
2019-07-02DBP 20053898625.4 ppb
2019-07-02DBP 20053898724.4 ppb
2019-07-02DBP 20053898824.3 ppb
2019-07-02DBP 20053898924.0 ppb
2019-10-08DBP 20055201220.2 ppb
2019-10-08DBP 20055201317.5 ppb
2019-10-08DBP 20055201417.0 ppb
2019-10-08DBP 20055201517.5 ppb