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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Juneau

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.47 ppb1610ND - 4.10 ppb
20150.969 ppb165ND - 4.80 ppb
20160.631 ppb163ND - 4.10 ppb
20171.16 ppb168ND - 3.80 ppb
20181.08 ppb167ND - 5.30 ppb
20191.14 ppb165ND - 5.30 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
2014-01-06DB*2014011100412.10 ppb
2014-01-06DB*2014011100421.000 ppb
2014-01-06DB*201401110043ND
2014-01-06DB*2014011100393.20 ppb
2014-04-01DB*201404030460ND
2014-04-01DB*2014040304623.50 ppb
2014-04-01DB*201404030463ND
2014-04-01DB*201404030464ND
2014-07-07H2*30595424.10 ppb
2014-07-07H2*3059544ND
2014-07-07H2*30595431.000 ppb
2014-07-07H2*3059541ND
2014-10-06DH*31204011.40 ppb
2014-10-06DH*31203991.70 ppb
2014-10-06DH*31203973.30 ppb
2014-10-06DH*31203952.20 ppb
2015-01-12DH*3172556ND
2015-01-12DH*31725572.50 ppb
2015-01-12DH*3172558ND
2015-01-12DH*3172559ND
2015-04-06DH*3219942ND
2015-04-06DH*32199443.40 ppb
2015-04-06DH*3219946ND
2015-04-06DH*3219948ND
2015-07-06DH*32757704.80 ppb
2015-07-06DH*3275772ND
2015-07-06DH*3275771ND
2015-07-06DH*3275769ND
2015-10-05DH*3336170ND
2015-10-05DH*3336171ND
2015-10-05DH*33361721.10 ppb
2015-10-05DH*33361693.70 ppb
2016-01-04DH*3382671ND
2016-01-04DH*3382672ND
2016-01-04DH*3382670ND
2016-01-04DH*3382669ND
2016-04-04DH*3426416ND
2016-04-04DH*3426417ND
2016-04-04DH*3426418ND
2016-04-04DH*3426419ND
2016-07-18DH*3499728ND
2016-07-18DH*34997294.10 ppb
2016-07-18DH*3499730ND
2016-07-18DH*3499731ND
2016-10-03DB*3559109ND
2016-10-03DB*3559108ND
2016-10-03DB*35591073.60 ppb
2016-10-03DB*35591062.40 ppb
2017-01-09DH*3619068ND
2017-01-09DH*3619065ND
2017-01-09DH*36190663.10 ppb
2017-01-09DH*3619067ND
2017-04-03DH*3667838ND
2017-04-03DH*36678392.90 ppb
2017-04-03DH*3667840ND
2017-04-03DH*3667841ND
2017-07-03DH*3726831ND
2017-07-03DH*3726830ND
2017-07-03DH*37268293.80 ppb
2017-07-03DH*37268281.30 ppb
2017-10-02DH*37918492.20 ppb
2017-10-02DH*37918503.10 ppb
2017-10-02DH*37918511.10 ppb
2017-10-02DH*37918521.000 ppb
2018-01-08DH*3851252ND
2018-01-08DH*3851253ND
2018-01-08DH*38512513.00 ppb
2018-01-08DH*38512501.10 ppb
2018-04-02DH*3904667ND
2018-04-02DH*3904664ND
2018-04-02DH*39046652.50 ppb
2018-04-02DH*3904666ND
2018-07-09DH*3986722ND
2018-07-09DH*3986721ND
2018-07-09DH*39867205.30 ppb
2018-07-09DH*39867191.90 ppb
2018-10-01DH*40777251.90 ppb
2018-10-01DH*40777261.50 ppb
2018-10-01DH*4077727ND
2018-10-01DH*4077728ND
2019-01-084169971ND
2019-01-0841699742.40 ppb
2019-01-084169976ND
2019-01-084169978ND
2019-04-014248541ND
2019-04-014248544ND
2019-04-014248543ND
2019-04-0142485424.30 ppb
2019-07-0843493625.30 ppb
2019-07-084349366ND
2019-07-084349364ND
2019-07-084349359ND
2019-10-074451139ND
2019-10-074451137ND
2019-10-0744511354.90 ppb
2019-10-0744511331.30 ppb