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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Hosston Mira Water System

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

 

106

Samples

0

Samples exceeding legal limit (MCL)

30

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND220ND
2015ND160ND
2016ND160ND
20171.23 ppb2012ND - 8.60 ppb
20180.488 ppb164ND - 2.10 ppb
20194.68 ppb1614ND - 14.9 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
2014-03-271288574ND
2014-03-271288575ND
2014-03-271288576ND
2014-03-271288574ND
2014-03-271288575ND
2014-03-271288576ND
2014-05-151301857ND
2014-05-151301858ND
2014-05-151301859ND
2014-05-151301857ND
2014-05-151301858ND
2014-05-151301859ND
2014-07-031315064ND
2014-07-031315065ND
2014-07-031315066ND
2014-07-031315064ND
2014-07-031315065ND
2014-07-031315066ND
2014-10-021339231ND
2014-10-021339232ND
2014-10-021339231ND
2014-10-021339232ND
2015-01-091363415ND
2015-01-091363416ND
2015-01-091363415ND
2015-01-091363416ND
2015-04-071384745ND
2015-04-071384746ND
2015-04-071384745ND
2015-04-071384746ND
2015-07-141410796ND
2015-07-141410797ND
2015-07-141410796ND
2015-07-141410797ND
2015-10-301440049ND
2015-10-301440050ND
2015-10-301440049ND
2015-10-301440050ND
2016-01-111457680ND
2016-01-111457681ND
2016-01-111457680ND
2016-01-111457681ND
2016-04-211484758ND
2016-04-211484759ND
2016-04-211484758ND
2016-04-211484759ND
2016-07-151507918ND
2016-07-151507919ND
2016-07-151507918ND
2016-07-151507919ND
2016-10-271536532ND
2016-10-271536533ND
2016-10-271536532ND
2016-10-271536533ND
2017-01-2035290204007ND
2017-01-20352902040088.60 ppb
2017-01-2035290204007ND
2017-01-20352902040088.60 ppb
2017-02-1735296086001ND
2017-02-1735296086002ND
2017-02-1735296086001ND
2017-02-1735296086002ND
2017-04-06353051840170.950 ppb
2017-04-06353051840180.720 ppb
2017-04-06353051840170.950 ppb
2017-04-06353051840180.720 ppb
2017-07-13353243170110.510 ppb
2017-07-1335324317012ND
2017-07-13353243170110.510 ppb
2017-07-1335324317012ND
2017-10-20353434310010.860 ppb
2017-10-20353434310020.650 ppb
2017-10-20353434310010.860 ppb
2017-10-20353434310020.650 ppb
2018-01-1935369362001ND
2018-01-1935369362002ND
2018-01-1935369362001ND
2018-01-1935369362002ND
2018-04-0535384646001ND
2018-04-0535384646002ND
2018-04-0535384646001ND
2018-04-0535384646002ND
2018-07-12354043680011.80 ppb
2018-07-1235404368002ND
2018-07-12354043680011.80 ppb
2018-07-1235404368002ND
2018-10-2235426520001ND
2018-10-22354265200022.10 ppb
2018-10-2235426520001ND
2018-10-22354265200022.10 ppb
2019-01-16354432250017.30 ppb
2019-01-16354432250022.20 ppb
2019-01-16354432250017.30 ppb
2019-01-16354432250022.20 ppb
2019-04-1035461526001ND
2019-04-10354615260022.40 ppb
2019-04-1035461526001ND
2019-04-10354615260022.40 ppb
2019-07-083548135800114.9 ppb
2019-07-08354813580026.30 ppb
2019-07-083548135800114.9 ppb
2019-07-08354813580026.30 ppb
2019-10-03355028490012.20 ppb
2019-10-03355028490022.10 ppb
2019-10-03355028490012.20 ppb
2019-10-03355028490022.10 ppb