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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

CTWC - Unionville System

Monochloroacetic 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)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND230ND
2015N/A00N/A
20160.663 ppb162ND - 7.80 ppb
2017ND160ND
20180.1000 ppb162ND - 1.000 ppb
20190.319 ppb166ND - 1.10 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic 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.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-22BG02299HAA5ND
2014-01-23BG02294HAA5ND
2014-01-23BG02295HAA5ND
2014-01-23BG02296HAA5ND
2014-01-23BG02297HAA5ND
2014-01-23BG02298HAA5ND
2014-01-23BG02300HAA5ND
2014-01-31BG06718HAA5ND
2014-01-31BG06717HAA5ND
2014-01-31BG06716HAA5ND
2014-01-31BG06715HAA5ND
2014-04-22BG36625HAA5ND
2014-04-22BG36626HAA5ND
2014-04-22BG36627HAA5ND
2014-04-22BG36628HAA5ND
2014-07-22BG81008HAA5ND
2014-07-22BG81009HAA5ND
2014-07-22BG81010HAA5ND
2014-07-22BG81011HAA5ND
2014-10-22BH31461HAA5ND
2014-10-22BH31460HAA5ND
2014-10-22BH31459HAA5ND
2014-10-22BH31458HAA5ND
2016-01-11BK51264HAA5ND
2016-01-11BK51265HAA5ND
2016-01-11BK51263HAA5ND
2016-01-18BK54312HAA5ND
2016-04-18BN15772HAA5ND
2016-04-18BN15773HAA5ND
2016-04-18BN15774HAA5ND
2016-04-18BN15775HAA5ND
2016-07-12BN71240HAA5ND
2016-07-12BN71241HAA5ND
2016-07-13BN72150HAA57.80 ppb
2016-07-13BN72151HAA5ND
2016-10-04BV35900HAA52.80 ppb
2016-10-04BV35901HAA5ND
2016-10-04BV35905HAA5ND
2016-10-11BV44240HAA5ND
2017-01-17BX30317HAA5ND
2017-01-17BX30318HAA5ND
2017-01-17BX30319HAA5ND
2017-01-17BX30320HAA5ND
2017-04-11BY02322HAA5ND
2017-04-11BY02319HAA5ND
2017-04-11BY02320HAA5ND
2017-04-11BY02321HAA5ND
2017-07-18BY63323HAA5ND
2017-07-18BY63324HAA5ND
2017-07-18BY63325HAA5ND
2017-07-18BY63326HAA5ND
2017-10-24BZ26033HAA5ND
2017-10-24BZ26034HAA5ND
2017-10-24BZ26035HAA5ND
2017-10-24BZ26036HAA5ND
2018-01-16BZ73286HAA5ND
2018-01-16BZ73289HAA5ND
2018-01-16BZ73288HAA5ND
2018-01-16BZ73287HAA5ND
2018-04-27CA37381HAA5ND
2018-04-27CA37382HAA5ND
2018-04-27CA37383HAA5ND
2018-04-27CA37384HAA5ND
2018-07-24CA96737ND
2018-07-24CA96736ND
2018-07-24CA96734ND
2018-07-24CA96735ND
2018-10-02DBP 2005076651.000 ppb
2018-10-02DBP 2005076660.600 ppb
2018-10-02DBP 200507667ND
2018-10-02DBP 200508020ND
2019-01-08DBP 2005181301.10 ppb
2019-01-08DBP 2005181360.600 ppb
2019-01-08DBP 2005181390.800 ppb
2019-01-08DBP 200518143ND
2019-04-09DBP 200527847ND
2019-04-09DBP 200527849ND
2019-04-09DBP 2005278480.800 ppb
2019-04-09DBP 2005278460.900 ppb
2019-07-02DBP 200538986ND
2019-07-02DBP 200538987ND
2019-07-02DBP 200538988ND
2019-07-02DBP 2005389890.900 ppb
2019-10-08DBP 200552012ND
2019-10-08DBP 200552013ND
2019-10-08DBP 200552014ND
2019-10-08DBP 200552015ND