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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

CTWC - Unionville System

Dichloroacetic 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
20148.62 ppb2320ND - 18.0 ppb
2015N/A00N/A
20168.93 ppb16163.20 ppb - 16.0 ppb
20176.54 ppb1614ND - 15.0 ppb
201812.1 ppb16162.50 ppb - 18.2 ppb
20198.73 ppb16162.20 ppb - 19.5 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2014-01-22BG02299HAA53.30 ppb
2014-01-23BG02294HAA5ND
2014-01-23BG02295HAA513.0 ppb
2014-01-23BG02296HAA5ND
2014-01-23BG02297HAA53.70 ppb
2014-01-23BG02298HAA5ND
2014-01-23BG02300HAA52.40 ppb
2014-01-31BG06718HAA55.20 ppb
2014-01-31BG06717HAA55.90 ppb
2014-01-31BG06716HAA517.0 ppb
2014-01-31BG06715HAA518.0 ppb
2014-04-22BG36625HAA515.0 ppb
2014-04-22BG36626HAA515.0 ppb
2014-04-22BG36627HAA516.0 ppb
2014-04-22BG36628HAA59.20 ppb
2014-07-22BG81008HAA514.0 ppb
2014-07-22BG81009HAA516.0 ppb
2014-07-22BG81010HAA511.0 ppb
2014-07-22BG81011HAA53.90 ppb
2014-10-22BH31461HAA53.90 ppb
2014-10-22BH31460HAA57.30 ppb
2014-10-22BH31459HAA57.40 ppb
2014-10-22BH31458HAA511.0 ppb
2016-01-11BK51264HAA59.40 ppb
2016-01-11BK51265HAA54.20 ppb
2016-01-11BK51263HAA59.90 ppb
2016-01-18BK54312HAA53.50 ppb
2016-04-18BN15772HAA59.50 ppb
2016-04-18BN15773HAA53.20 ppb
2016-04-18BN15774HAA511.0 ppb
2016-04-18BN15775HAA57.70 ppb
2016-07-12BN71240HAA511.0 ppb
2016-07-12BN71241HAA516.0 ppb
2016-07-13BN72150HAA515.0 ppb
2016-07-13BN72151HAA57.80 ppb
2016-10-04BV35900HAA510.00 ppb
2016-10-04BV35901HAA55.70 ppb
2016-10-04BV35905HAA56.00 ppb
2016-10-11BV44240HAA513.0 ppb
2017-01-17BX30317HAA56.30 ppb
2017-01-17BX30318HAA56.40 ppb
2017-01-17BX30319HAA56.90 ppb
2017-01-17BX30320HAA57.40 ppb
2017-04-11BY02322HAA512.0 ppb
2017-04-11BY02319HAA59.30 ppb
2017-04-11BY02320HAA57.10 ppb
2017-04-11BY02321HAA510.00 ppb
2017-07-18BY63323HAA515.0 ppb
2017-07-18BY63324HAA5ND
2017-07-18BY63325HAA59.00 ppb
2017-07-18BY63326HAA56.10 ppb
2017-10-24BZ26033HAA52.20 ppb
2017-10-24BZ26034HAA52.90 ppb
2017-10-24BZ26035HAA54.00 ppb
2017-10-24BZ26036HAA5ND
2018-01-16BZ73286HAA516.0 ppb
2018-01-16BZ73289HAA512.0 ppb
2018-01-16BZ73288HAA515.0 ppb
2018-01-16BZ73287HAA513.0 ppb
2018-04-27CA37381HAA513.0 ppb
2018-04-27CA37382HAA514.0 ppb
2018-04-27CA37383HAA515.0 ppb
2018-04-27CA37384HAA515.0 ppb
2018-07-24CA967372.50 ppb
2018-07-24CA967368.20 ppb
2018-07-24CA9673416.0 ppb
2018-07-24CA9673518.0 ppb
2018-10-02DBP 20050766518.2 ppb
2018-10-02DBP 2005076669.10 ppb
2018-10-02DBP 2005076673.40 ppb
2018-10-02DBP 2005080205.70 ppb
2019-01-08DBP 20051813019.5 ppb
2019-01-08DBP 20051813610.8 ppb
2019-01-08DBP 20051813913.4 ppb
2019-01-08DBP 2005181434.60 ppb
2019-04-09DBP 2005278474.20 ppb
2019-04-09DBP 2005278495.90 ppb
2019-04-09DBP 20052784815.7 ppb
2019-04-09DBP 2005278468.00 ppb
2019-07-02DBP 20053898611.4 ppb
2019-07-02DBP 2005389873.70 ppb
2019-07-02DBP 2005389886.10 ppb
2019-07-02DBP 20053898915.9 ppb
2019-10-08DBP 2005520125.30 ppb
2019-10-08DBP 20055201310.00 ppb
2019-10-08DBP 2005520142.20 ppb
2019-10-08DBP 2005520152.90 ppb