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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Hope Water Light Comm.

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)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20149.50 ppb2011ND - 38.3 ppb
201516.2 ppb1610ND - 46.4 ppb
20163.69 ppb167ND - 24.4 ppb
20172.89 ppb167ND - 28.0 ppb
20188.68 ppb137ND - 35.5 ppb
20196.69 ppb157ND - 27.7 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
2014-01-0714010003701ND
2014-01-0714010004101ND
2014-01-0714010003801ND
2014-01-0714010003901ND
2014-04-0114094001301ND
2014-04-011409400120123.0 ppb
2014-04-0114094000901ND
2014-04-011409400100133.0 ppb
2014-05-21141420089011.80 ppb
2014-05-211414200860117.4 ppb
2014-05-21141420087011.30 ppb
2014-05-211414200850134.8 ppb
2014-07-0214184013901ND
2014-07-02141840136011.60 ppb
2014-07-021418401370123.2 ppb
2014-07-021418401350138.3 ppb
2014-10-0114276000901ND
2014-10-0114276000501ND
2014-10-01142760006011.70 ppb
2014-10-011427600080113.8 ppb
2015-01-0515008001901ND
2015-01-0515008002301ND
2015-01-05150080022012.30 ppb
2015-01-0515008002001ND
2015-04-061510000090122.2 ppb
2015-04-061510000100114.0 ppb
2015-04-0615100001301ND
2015-04-06151000012014.10 ppb
2015-07-0815190003601ND
2015-07-081519000320145.3 ppb
2015-07-081519000330146.4 ppb
2015-07-081519000350137.4 ppb
2015-10-051528200040136.1 ppb
2015-10-0515282000601ND
2015-10-051528200030126.9 ppb
2015-10-051528200050124.6 ppb
2016-01-0616008010101ND
2016-01-06160080100011.20 ppb
2016-01-0616008010201ND
2016-01-0616008010301ND
2016-04-0416098011301ND
2016-04-0416098011601ND
2016-04-0416098011401ND
2016-04-0416098011501ND
2016-07-05161890104013.10 ppb
2016-07-051618901050124.4 ppb
2016-07-0516189010701ND
2016-07-05161890106011.70 ppb
2016-10-05162800093012.20 ppb
2016-10-05162800094013.60 ppb
2016-10-051628000920122.8 ppb
2016-10-0516280009501ND
2017-01-04170050045011.000 ppb
2017-01-0417005004701ND
2017-01-04170050046019.30 ppb
2017-01-0417005004801ND
2017-05-09171300091011.50 ppb
2017-05-09171300090011.50 ppb
2017-05-091713000890128.0 ppb
2017-05-09171300088011.50 ppb
2017-07-0517187003601ND
2017-07-0517187003701ND
2017-07-0517187003501ND
2017-07-0517187003801ND
2017-10-04172780037013.40 ppb
2017-10-0417278003801ND
2017-10-0417278003601ND
2017-10-2417299002501ND
2018-01-0318004006501ND
2018-01-0318004006401ND
2018-01-0318004006601ND
2018-01-03180040067011.20 ppb
2018-04-0418095009101ND
2018-04-041809500890121.4 ppb
2018-04-0418095009201ND
2018-04-04180950090015.60 ppb
2018-07-0318186005701ND
2018-07-03181860058014.80 ppb
2018-07-031818600590122.2 ppb
2018-07-031818600600122.2 ppb
2018-10-031827700640135.5 ppb
2019-01-0919010009201ND
2019-01-0919010009001ND
2019-01-09190100091011.10 ppb
2019-01-091901000930120.2 ppb
2019-04-0219094004201ND
2019-04-0219094004301ND
2019-04-0219094004101ND
2019-04-021909400400127.4 ppb
2019-08-19192330004013.30 ppb
2019-08-1919233000301ND
2019-08-1919233000501ND
2019-10-021927600370112.9 ppb
2019-10-021927600360127.7 ppb
2019-10-02192760038017.70 ppb
2019-10-0219276003901ND