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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Dona Ana MDWCA

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
20150.0485 ppb204ND - 0.340 ppb
2016ND160ND
20170.230 ppb122ND - 1.90 ppb
20180.504 ppb128ND - 1.80 ppb
20191.06 ppb1612ND - 4.30 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
2014-03-311404055-001BND
2014-03-311404081-001BND
2014-03-311404082-001BND
2014-03-311404083-001BND
2014-08-201408C36-001AND
2014-08-201408C34-001AND
2014-08-201408C16-001AND
2014-09-241409C74-001BND
2014-12-161412987-001BND
2014-12-161412985-001BND
2014-12-161412984-001BND
2014-12-161412986-001BND
2015-03-241503C67-001AND
2015-03-241503C16-001BND
2015-03-241503C16-001AND
2015-03-241503C69-001BND
2015-03-241503C69-001AND
2015-03-241503C68-001BND
2015-03-241503C68-001AND
2015-03-241503C67-001BND
2015-06-102015017184ND
2015-06-102015017185ND
2015-06-102015017187ND
2015-06-1020150171860.160 ppb
2015-09-0120150261990.140 ppb
2015-09-012015026200ND
2015-09-012015026201ND
2015-09-0120150262020.330 ppb
2015-12-1420150365850.340 ppb
2015-12-142015036582ND
2015-12-142015036584ND
2015-12-142015036583ND
2016-03-082016006833ND
2016-03-082016006832ND
2016-03-082016006834ND
2016-03-082016006835ND
2016-06-092016016465ND
2016-06-092016016462ND
2016-06-092016016463ND
2016-06-092016016464ND
2016-09-142016026974ND
2016-09-142016026973ND
2016-09-142016026971ND
2016-09-142016026972ND
2016-12-062016035276ND
2016-12-062016035279ND
2016-12-062016035278ND
2016-12-062016035277ND
2017-03-302017009211ND
2017-03-302017009210ND
2017-03-302017009213ND
2017-03-302017009212ND
2017-06-1320170173190.860 ppb
2017-06-132017017317ND
2017-06-132017017318ND
2017-06-222017018392ND
2017-09-062017025773ND
2017-09-062017025772ND
2017-09-062017025771ND
2017-09-1220170264401.90 ppb
2018-03-0720180067880.920 ppb
2018-03-072018006787ND
2018-03-072018006786ND
2018-03-072018006785ND
2018-06-1220180163241.80 ppb
2018-06-122018016321ND
2018-06-1220180163220.490 ppb
2018-06-1220180163230.600 ppb
2018-12-0420180336130.510 ppb
2018-12-0420180336140.770 ppb
2018-12-0420180336150.530 ppb
2018-12-0420180336270.430 ppb
2019-03-0620190056321.10 ppb
2019-03-062019005633ND
2019-03-062019005634ND
2019-03-0620190056370.700 ppb
2019-06-0520190155550.640 ppb
2019-06-0520190155560.850 ppb
2019-06-0520190155572.10 ppb
2019-06-0520190155581.50 ppb
2019-09-0920190253160.960 ppb
2019-09-092019025318ND
2019-09-0920190253170.470 ppb
2019-09-0920190253152.70 ppb
2019-12-1220190351354.30 ppb
2019-12-1220190351340.620 ppb
2019-12-1220190351331.000 ppb
2019-12-122019035132ND