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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Ardmore

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

 

100

Samples

0

Samples exceeding legal limit (MCL)

63

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201415.8 ppb16168.13 ppb - 23.7 ppb
201515.6 ppb1615ND - 30.0 ppb
20169.87 ppb1614ND - 37.0 ppb
20170.707 ppb162ND - 6.16 ppb
20182.78 ppb167ND - 7.00 ppb
20196.91 ppb209ND - 42.0 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
2014-02-11140223212.7 ppb
2014-02-11140223112.7 ppb
2014-02-11140223010.9 ppb
2014-02-1114022299.93 ppb
2014-05-13140545819.7 ppb
2014-05-13140545719.7 ppb
2014-05-13140545622.4 ppb
2014-05-13140545523.7 ppb
2014-08-12140838321.9 ppb
2014-08-12140838221.8 ppb
2014-08-12140838119.7 ppb
2014-08-12140838022.5 ppb
2014-11-1314113928.57 ppb
2014-11-1314113899.17 ppb
2014-11-1314113908.13 ppb
2014-11-1314113918.78 ppb
2015-02-10150240514.9 ppb
2015-02-10150240414.5 ppb
2015-02-10150240312.2 ppb
2015-02-10150240212.6 ppb
2015-05-12150544527.5 ppb
2015-05-12150544429.1 ppb
2015-05-12150544330.0 ppb
2015-05-12150544229.0 ppb
2015-08-1115083499.69 ppb
2015-08-1115083469.85 ppb
2015-08-1115083479.59 ppb
2015-08-11150834810.1 ppb
2015-11-17151151214.0 ppb
2015-11-1715115112.04 ppb
2015-11-171511510ND
2015-11-17151150924.7 ppb
2016-02-09160235615.4 ppb
2016-02-09160235516.7 ppb
2016-02-0916023544.22 ppb
2016-02-09160235317.4 ppb
2016-05-10160533914.7 ppb
2016-05-10160533737.0 ppb
2016-05-1016053383.48 ppb
2016-05-10160534017.4 ppb
2016-08-0916082656.76 ppb
2016-08-0916082642.23 ppb
2016-08-091608263ND
2016-08-0916082627.01 ppb
2016-11-0116110776.26 ppb
2016-11-0116110763.46 ppb
2016-11-011611075ND
2016-11-0116110745.85 ppb
2017-02-161702547ND
2017-02-161702546ND
2017-02-161702545ND
2017-02-161702544ND
2017-05-1817055756.16 ppb
2017-05-181705574ND
2017-05-181705573ND
2017-05-181705572ND
2017-08-021708031ND
2017-08-021708030ND
2017-08-0217080295.15 ppb
2017-08-021708028ND
2017-11-141711426ND
2017-11-141711424ND
2017-11-141711425ND
2017-11-141711427ND
2018-02-201802565ND
2018-02-201802564ND
2018-02-201802563ND
2018-02-201802562ND
2018-05-151805482ND
2018-05-151805481ND
2018-05-1518054806.34 ppb
2018-05-1518054795.85 ppb
2018-08-2118081125ND
2018-08-21180811246.34 ppb
2018-08-21180811266.11 ppb
2018-08-21180811277.00 ppb
2018-11-2718116886.65 ppb
2018-11-271811687ND
2018-11-271811686ND
2018-11-2718116856.18 ppb
2019-02-12190239342.0 ppb
2019-02-12190239228.6 ppb
2019-02-121902391ND
2019-02-12190239032.4 ppb
2019-02-2819026925.43 ppb
2019-02-2819026905.61 ppb
2019-02-2819026915.28 ppb
2019-02-2819026935.47 ppb
2019-05-1619055245.65 ppb
2019-05-161905523ND
2019-05-161905522ND
2019-05-161905521ND
2019-08-211908624ND
2019-08-211908623ND
2019-08-211908622ND
2019-08-2119086217.81 ppb
2019-11-191911604ND
2019-11-191911605ND
2019-11-191911606ND
2019-11-191911603ND