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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Dover Water Department

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

 

64

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
20160.163 ppb162ND - 1.30 ppb
20170.0750 ppb161ND - 1.20 ppb
20180.131 ppb162ND - 1.10 ppb
2019ND160ND

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
2016-02-10B600643002ND
2016-02-10B600643003ND
2016-02-10B6006430041.30 ppb
2016-02-10B600643001ND
2016-05-17B602906001ND
2016-05-17B602906002ND
2016-05-17B602906003ND
2016-05-17B602906004ND
2016-08-16B6075670021.30 ppb
2016-08-16B607567004ND
2016-08-16B607567003ND
2016-08-16B607567001ND
2016-11-14B610194001ND
2016-11-14B610194002ND
2016-11-14B610194003ND
2016-11-14B610194004ND
2017-02-15B700692002ND
2017-02-15B700692004ND
2017-02-15B700692003ND
2017-02-15B700692001ND
2017-05-16B702573001ND
2017-05-16B7025730021.20 ppb
2017-05-16B702573003ND
2017-05-16B702573004ND
2017-08-14B707045001ND
2017-08-14B707045002ND
2017-08-14B707045003ND
2017-08-14B707045004ND
2017-11-15B709894001ND
2017-11-15B709894002ND
2017-11-15B709894003ND
2017-11-15B709894004ND
2018-02-12B8005580011.000 ppb
2018-02-12B800558004ND
2018-02-12B800558002ND
2018-02-12B800558003ND
2018-05-17B802601001ND
2018-05-17B802601002ND
2018-05-17B802601003ND
2018-05-18B802643001ND
2018-08-15B806955001ND
2018-08-15B806955002ND
2018-08-15B806955003ND
2018-08-15B806955004ND
2018-11-15B809631001ND
2018-11-15B809631002ND
2018-11-15B809631003ND
2018-11-15B8096310041.10 ppb
2019-02-11B900756002ND
2019-02-11B900756004ND
2019-02-11B900756003ND
2019-02-11B900756001ND
2019-05-15B902880001ND
2019-05-15B902880002ND
2019-05-15B902880003ND
2019-05-15B902880004ND
2019-08-13B907249001ND
2019-08-13B907249002ND
2019-08-13B907249003ND
2019-08-13B907249004ND
2019-11-14B910096001ND
2019-11-14B910096002ND
2019-11-14B910096003ND
2019-11-14B910096004ND