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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Montgomery County MUD47

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)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
2015ND160ND
201612.8 ppb16163.30 ppb - 19.9 ppb
201713.2 ppb16164.00 ppb - 26.5 ppb
20185.78 ppb16163.30 ppb - 7.90 ppb
20194.11 ppb1614ND - 7.30 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
2014-02-21AC44245ND
2014-02-21AC44249ND
2014-02-21AC44243ND
2014-02-21AC44250ND
2014-04-28AC51867ND
2014-04-28AC51851ND
2014-04-28AC51866ND
2014-04-28AC51852ND
2014-07-14AC59570ND
2014-07-14AC59613ND
2014-07-14AC59599ND
2014-07-14AC59592ND
2014-10-27AC70601ND
2014-11-07AC71707ND
2014-11-07AC71742ND
2014-11-07AC71714ND
2015-02-24AC81635ND
2015-02-24AC81664ND
2015-02-24AC81654ND
2015-02-24AC81652ND
2015-05-01AC90289ND
2015-05-01AC90291ND
2015-05-01AC90251ND
2015-05-01AC90258ND
2015-07-14AC99360ND
2015-07-14AC99362ND
2015-07-14AC99356ND
2015-07-14AC99364ND
2015-10-15AD10776ND
2015-10-15AD10781ND
2015-10-15AD10774ND
2015-10-15AD10796ND
2016-03-09AD278574.70 ppb
2016-03-09AD278624.10 ppb
2016-03-09AD278543.30 ppb
2016-03-09AD278517.00 ppb
2016-05-19AD3744013.2 ppb
2016-05-19AD3744312.7 ppb
2016-05-19AD3744810.1 ppb
2016-05-19AD3743811.4 ppb
2016-09-28AD5186117.0 ppb
2016-09-28AD5183916.7 ppb
2016-09-28AD5185515.4 ppb
2016-09-29AD5198017.5 ppb
2016-11-02AD5642715.2 ppb
2016-11-03AD5643019.9 ppb
2016-11-03AD5643218.5 ppb
2016-11-03AD5642917.3 ppb
2017-01-25AD6672626.5 ppb
2017-01-25AD6674722.8 ppb
2017-01-25AD6674425.4 ppb
2017-01-25AD6674524.2 ppb
2017-04-20AD8036013.3 ppb
2017-04-20AD8036310.5 ppb
2017-04-20AD8035212.7 ppb
2017-04-20AD8035813.6 ppb
2017-07-13AD8922012.8 ppb
2017-07-13AD8922111.2 ppb
2017-07-13AD8922611.6 ppb
2017-07-13AD892179.80 ppb
2017-11-02AE034024.70 ppb
2017-11-02AE034044.20 ppb
2017-11-02AE033994.00 ppb
2017-11-02AE034054.20 ppb
2018-02-07AE127465.00 ppb
2018-02-07AE126987.70 ppb
2018-02-07AE127067.90 ppb
2018-02-07AE127027.90 ppb
2018-05-24AE274446.20 ppb
2018-05-24AE276926.90 ppb
2018-05-24AE276913.30 ppb
2018-05-24AE276645.10 ppb
2018-09-12AE397854.10 ppb
2018-09-12AE397873.90 ppb
2018-09-12AE397944.80 ppb
2018-09-12AE397814.60 ppb
2018-12-12AE486376.70 ppb
2018-12-12AE486346.50 ppb
2018-12-12AE486365.90 ppb
2018-12-12AE486356.00 ppb
2019-03-06AE573455.40 ppb
2019-03-06AE573416.60 ppb
2019-03-06AE573475.90 ppb
2019-03-06AE573445.70 ppb
2019-05-23AE679223.60 ppb
2019-05-23AE679253.00 ppb
2019-05-23AE679362.90 ppb
2019-05-23AE679282.40 ppb
2019-09-16AE835852.50 ppb
2019-09-16AE835922.80 ppb
2019-09-16AE83591ND
2019-09-16AE83596ND
2019-11-26AE905797.00 ppb
2019-11-26AE905677.30 ppb
2019-11-26AE905654.70 ppb
2019-11-26AE905686.00 ppb