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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

El Dorado Waterworks

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

41

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.13 ppb1611ND - 2.90 ppb
20150.525 ppb166ND - 2.00 ppb
20160.425 ppb166ND - 1.30 ppb
20170.600 ppb144ND - 3.70 ppb
20180.556 ppb166ND - 1.80 ppb
20190.900 ppb168ND - 2.30 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
2014-03-05140660030011.20 ppb
2014-03-0514066000601ND
2014-03-0514066000501ND
2014-03-05140660004011.10 ppb
2014-06-10141630062011.10 ppb
2014-06-11141630071012.90 ppb
2014-06-11141630076011.80 ppb
2014-06-11141630077011.20 ppb
2014-08-25142390006011.50 ppb
2014-08-25142390004011.70 ppb
2014-08-25142390001011.20 ppb
2014-08-25142390005012.40 ppb
2014-11-1214317003101ND
2014-11-1214317003301ND
2014-11-12143170028012.00 ppb
2014-11-1214317003001ND
2015-03-1015071003001ND
2015-03-1015071003101ND
2015-03-1015071003301ND
2015-03-10150710034011.20 ppb
2015-06-02151540019011.000 ppb
2015-06-02151540020011.30 ppb
2015-06-0215154001101ND
2015-06-0215154001201ND
2015-08-31152460008012.00 ppb
2015-08-3115246000701ND
2015-08-3115246000901ND
2015-08-3115246000401ND
2015-11-3015335001001ND
2015-12-0115335001201ND
2015-12-01153350013011.40 ppb
2015-12-01153350011011.50 ppb
2016-03-0816070003401ND
2016-03-08160700037011.000 ppb
2016-03-0816070003601ND
2016-03-0816070003501ND
2016-06-06161610056011.000 ppb
2016-06-0616161005801ND
2016-06-06161610057011.10 ppb
2016-06-0816161007401ND
2016-09-0716252008101ND
2016-09-07162520080011.30 ppb
2016-09-0716252007901ND
2016-09-0716252007601ND
2016-11-28163360039011.20 ppb
2016-11-2816336004001ND
2016-11-2816336004101ND
2016-11-28163360038011.20 ppb
2017-03-1317075000201ND
2017-03-1317075000401ND
2017-03-1317075000101ND
2017-03-1317075000301ND
2017-06-13171660017013.70 ppb
2017-06-1317166001501ND
2017-09-1217257001701ND
2017-09-12172570018011.40 ppb
2017-09-1217257001601ND
2017-09-12172570019011.40 ppb
2017-12-1117348001501ND
2017-12-1117348001301ND
2017-12-11173480014011.90 ppb
2017-12-1117348001601ND
2018-03-1318073004201ND
2018-03-1318073004301ND
2018-03-1318073004501ND
2018-03-1318073004401ND
2018-06-1218165005801ND
2018-06-1218165005701ND
2018-06-1218165006001ND
2018-06-1218165005901ND
2018-09-1018256005401ND
2018-09-10182560053011.80 ppb
2018-09-10182560052011.10 ppb
2018-09-10182560055011.30 ppb
2018-12-04183400024011.30 ppb
2018-12-0418340002501ND
2018-12-04183400022011.70 ppb
2018-12-04183400023011.70 ppb
2019-03-11190730029011.30 ppb
2019-03-1119073003201ND
2019-03-11190730030011.80 ppb
2019-03-1119073003101ND
2019-06-10191640023011.70 ppb
2019-06-10191640024012.20 ppb
2019-06-1019164002201ND
2019-06-1019164002601ND
2019-09-1019254001801ND
2019-09-10192540015011.90 ppb
2019-09-10192540016012.00 ppb
2019-09-10192540017012.30 ppb
2019-12-0219339001401ND
2019-12-0219339001501ND
2019-12-02193390016011.20 ppb
2019-12-0219339001301ND