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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Montgomery County MUD 7

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)

61

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
2015ND160ND
201615.3 ppb16168.30 ppb - 20.9 ppb
201713.8 ppb16164.30 ppb - 24.5 ppb
20185.99 ppb16164.00 ppb - 8.50 ppb
20194.37 ppb1613ND - 9.50 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
2014-02-21AC44189ND
2014-02-21AC44193ND
2014-02-21AC44186ND
2014-02-21AC44248ND
2014-04-28AC51849ND
2014-04-28AC51854ND
2014-04-28AC51848ND
2014-04-28AC51857ND
2014-07-14AC59585ND
2014-07-14AC59598ND
2014-07-14AC59610ND
2014-07-14AC59586ND
2014-10-27AC70546ND
2014-10-27AC70602ND
2014-10-27AC70558ND
2014-10-27AC70545ND
2015-02-24AC81638ND
2015-02-24AC81651ND
2015-02-24AC81649ND
2015-02-24AC81650ND
2015-05-01AC90256ND
2015-05-01AC90235ND
2015-05-01AC90266ND
2015-05-01AC90290ND
2015-07-14AC99365ND
2015-07-14AC99361ND
2015-07-14AC99358ND
2015-07-14AC99363ND
2015-10-15AD10779ND
2015-10-15AD10775ND
2015-10-15AD10777ND
2015-10-15AD10797ND
2016-03-09AD2786914.5 ppb
2016-03-09AD278678.30 ppb
2016-03-09AD2787011.2 ppb
2016-03-09AD2786613.0 ppb
2016-05-19AD3745114.0 ppb
2016-05-19AD3744110.6 ppb
2016-05-19AD3745410.7 ppb
2016-05-19AD3744611.2 ppb
2016-09-28AD5186315.7 ppb
2016-09-28AD5186718.8 ppb
2016-09-28AD5183516.7 ppb
2016-09-29AD5197320.9 ppb
2016-11-02AD5643719.7 ppb
2016-11-02AD5643418.9 ppb
2016-11-03AD5642419.8 ppb
2016-11-03AD5642520.6 ppb
2017-01-25AD6673624.5 ppb
2017-01-25AD6673523.8 ppb
2017-01-25AD6674824.5 ppb
2017-03-09AD7433523.1 ppb
2017-04-20AD8035112.0 ppb
2017-04-20AD8035712.5 ppb
2017-04-20AD8035414.2 ppb
2017-04-20AD8033514.5 ppb
2017-07-19AD8989110.8 ppb
2017-07-19AD8988218.5 ppb
2017-07-19AD8989910.9 ppb
2017-07-19AD8988311.0 ppb
2017-11-02AE034145.00 ppb
2017-11-02AE034004.30 ppb
2017-11-02AE034086.20 ppb
2017-11-02AE034064.70 ppb
2018-02-07AE127016.90 ppb
2018-02-07AE127076.60 ppb
2018-02-07AE126977.60 ppb
2018-02-07AE127048.10 ppb
2018-05-24AE276558.50 ppb
2018-05-24AE276685.80 ppb
2018-05-24AE276695.60 ppb
2018-05-24AE276937.30 ppb
2018-09-12AE397844.00 ppb
2018-09-12AE397934.90 ppb
2018-09-12AE397914.10 ppb
2018-09-12AE397794.60 ppb
2018-11-20AE466385.10 ppb
2018-11-20AE466364.90 ppb
2018-11-20AE466324.90 ppb
2018-11-20AE466306.90 ppb
2019-02-06AE531349.50 ppb
2019-02-06AE531359.10 ppb
2019-02-06AE531396.80 ppb
2019-02-06AE531368.80 ppb
2019-05-23AE679323.80 ppb
2019-05-23AE679233.10 ppb
2019-05-23AE679273.30 ppb
2019-05-23AE679263.20 ppb
2019-09-16AE835982.00 ppb
2019-09-16AE83597ND
2019-09-16AE835992.10 ppb
2019-09-16AE83590ND
2019-11-26AE90580ND
2019-11-26AE905765.10 ppb
2019-11-26AE905667.30 ppb
2019-11-26AE905785.80 ppb