Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dichloroacetic acid

Lahaina

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

 

84

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
20152.63 ppb2416ND - 8.30 ppb
20169.57 ppb1211ND - 18.0 ppb
20174.86 ppb16161.40 ppb - 8.20 ppb
20185.39 ppb1614ND - 9.40 ppb
20196.68 ppb16162.30 ppb - 12.0 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
2015-01-14201501160204ND
2015-01-14201501160205ND
2015-01-14201501160206ND
2015-01-14201501160207ND
2015-01-142015011602085.00 ppb
2015-01-14201501160203ND
2015-04-10201504150970ND
2015-04-102015041509695.80 ppb
2015-04-102015041509685.60 ppb
2015-04-102015041509676.10 ppb
2015-04-102015041509668.30 ppb
2015-04-132015041509815.50 ppb
2015-07-022015070705004.40 ppb
2015-07-022015070705014.00 ppb
2015-07-02201507070502ND
2015-07-022015070705031.40 ppb
2015-07-022015070705041.10 ppb
2015-07-022015070705054.90 ppb
2015-10-092015101306421.90 ppb
2015-10-092015101306472.00 ppb
2015-10-092015101306462.30 ppb
2015-10-092015101306452.80 ppb
2015-10-09201510130644ND
2015-10-092015101306431.90 ppb
2016-01-072.90 ppb
2016-01-0718.0 ppb
2016-01-071.70 ppb
2016-01-0718.0 ppb
2016-01-0717.0 ppb
2016-01-07ND
2016-04-147.30 ppb
2016-04-146.40 ppb
2016-07-2112.0 ppb
2016-07-2113.0 ppb
2016-10-068.70 ppb
2016-10-069.80 ppb
2017-01-125.60 ppb
2017-01-125.10 ppb
2017-01-233.80 ppb
2017-01-231.40 ppb
2017-04-065.80 ppb
2017-04-066.40 ppb
2017-04-066.40 ppb
2017-04-062.60 ppb
2017-07-143.90 ppb
2017-07-144.50 ppb
2017-07-144.40 ppb
2017-07-148.20 ppb
2017-10-066.00 ppb
2017-10-063.80 ppb
2017-10-064.10 ppb
2017-10-065.80 ppb
2018-01-11201801170693ND
2018-01-112018011706966.90 ppb
2018-01-11201801170694ND
2018-01-112018011706955.00 ppb
2018-04-052018041100186.50 ppb
2018-04-052018041100206.70 ppb
2018-04-052018041100196.90 ppb
2018-04-052018041100177.00 ppb
2018-07-062018071110339.40 ppb
2018-07-232018072503847.30 ppb
2018-07-232018072503838.40 ppb
2018-07-232018072503828.80 ppb
2018-10-042018100905183.20 ppb
2018-10-042018100905193.30 ppb
2018-10-042018100905213.30 ppb
2018-10-042018100905203.50 ppb
2019-01-042019010800756.60 ppb
2019-01-042019010800769.00 ppb
2019-01-042019010800748.80 ppb
2019-01-0420190108007310.00 ppb
2019-04-022019040403502.40 ppb
2019-04-022019040403512.90 ppb
2019-04-022019040403485.10 ppb
2019-04-022019040403494.80 ppb
2019-07-2620190730031512.0 ppb
2019-07-2620190730031411.0 ppb
2019-07-262019073003162.60 ppb
2019-07-262019073003172.30 ppb
2019-10-032019100806138.50 ppb
2019-10-032019100806127.50 ppb
2019-10-032019100806145.90 ppb
2019-10-032019100806157.40 ppb