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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Greendale Waterworks

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)

90

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.98 ppb1611ND - 3.90 ppb
20152.44 ppb1615ND - 3.40 ppb
20162.29 ppb16160.700 ppb - 3.70 ppb
20172.01 ppb16160.750 ppb - 3.20 ppb
20182.22 ppb16160.770 ppb - 3.40 ppb
20191.77 ppb16160.670 ppb - 2.30 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
2014-03-05773319ND
2014-03-05773321ND
2014-03-05773320ND
2014-03-05773318ND
2014-06-037941663.40 ppb
2014-06-037941653.50 ppb
2014-06-037941683.50 ppb
2014-06-037941673.90 ppb
2014-09-028147822.80 ppb
2014-09-028147812.70 ppb
2014-09-028147842.30 ppb
2014-09-028147832.10 ppb
2014-12-028336322.20 ppb
2014-12-02833635ND
2014-12-028336333.10 ppb
2014-12-028336342.20 ppb
2015-03-048464482.00 ppb
2015-03-048464472.00 ppb
2015-03-048464452.30 ppb
2015-03-048464463.20 ppb
2015-06-028631102.90 ppb
2015-06-028631113.20 ppb
2015-06-028631123.20 ppb
2015-06-028631132.90 ppb
2015-09-028806490.670 ppb
2015-09-028806463.40 ppb
2015-09-028806472.90 ppb
2015-09-028806482.60 ppb
2015-12-028962702.30 ppb
2015-12-028962723.00 ppb
2015-12-02896273ND
2015-12-028962712.40 ppb
2016-03-099093821.50 ppb
2016-03-099093802.50 ppb
2016-03-099093812.60 ppb
2016-03-099093792.80 ppb
2016-06-089258743.70 ppb
2016-06-089258733.70 ppb
2016-06-089258753.70 ppb
2016-06-089258723.30 ppb
2016-09-079440090.700 ppb
2016-09-079440061.60 ppb
2016-09-079440071.60 ppb
2016-09-079440081.80 ppb
2016-11-309622670.880 ppb
2016-11-309622652.00 ppb
2016-11-309622662.00 ppb
2016-11-309622642.20 ppb
2017-03-089769581.60 ppb
2017-03-089769562.40 ppb
2017-03-089769552.30 ppb
2017-03-089769571.90 ppb
2017-06-079963192.40 ppb
2017-06-079963182.50 ppb
2017-06-079963203.20 ppb
2017-06-079963212.30 ppb
2017-09-0610163842.40 ppb
2017-09-0610163852.30 ppb
2017-09-0610163822.30 ppb
2017-09-0610163830.750 ppb
2017-12-0610324931.70 ppb
2017-12-0610324941.70 ppb
2017-12-0610324951.70 ppb
2017-12-0610324920.750 ppb
2018-03-0710441592.90 ppb
2018-03-0710441573.20 ppb
2018-03-0710441563.40 ppb
2018-03-0710441583.40 ppb
2018-06-0610596862.30 ppb
2018-06-0610596872.50 ppb
2018-06-0610596842.60 ppb
2018-06-0610596852.70 ppb
2018-09-0510784360.780 ppb
2018-09-0510784372.20 ppb
2018-09-0510784342.10 ppb
2018-09-0510784350.770 ppb
2018-12-0610965101.90 ppb
2018-12-0610965071.90 ppb
2018-12-0610965081.30 ppb
2018-12-0610965091.60 ppb
2019-03-0611082441.80 ppb
2019-03-0611082432.00 ppb
2019-03-0611082462.30 ppb
2019-03-0611082452.30 ppb
2019-06-0511256542.20 ppb
2019-06-0511256522.30 ppb
2019-06-0511256532.20 ppb
2019-06-0511256512.10 ppb
2019-09-0411454220.690 ppb
2019-09-0411454251.40 ppb
2019-09-0411454231.70 ppb
2019-09-0411454241.70 ppb
2019-12-0411635700.670 ppb
2019-12-0411635731.50 ppb
2019-12-0411635721.60 ppb
2019-12-0411635711.80 ppb