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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Suburban Water Systems - San Jose Hills

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

149

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20143.46 ppb3224ND - 15.0 ppb
20155.48 ppb3228ND - 9.50 ppb
20163.20 ppb3222ND - 11.0 ppb
20174.80 ppb3223ND - 16.0 ppb
20185.05 ppb3228ND - 12.0 ppb
20193.32 ppb3224ND - 10.00 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
2014-01-229588-800-10404.70 ppb
2014-01-229588-801-10252.80 ppb
2014-01-229588-802-11104.30 ppb
2014-01-229588-803-10003.20 ppb
2014-01-229588-804-10202.90 ppb
2014-01-229588-805-11003.20 ppb
2014-01-229588-806-0940ND
2014-01-229588-807-10102.10 ppb
2014-04-219588-800-09401.10 ppb
2014-04-219588-801-0930ND
2014-04-219588-802-10002.40 ppb
2014-04-219588-803-0905ND
2014-04-219588-804-0920ND
2014-04-219588-805-09503.70 ppb
2014-04-219588-806-0855ND
2014-04-219588-807-0910ND
2014-07-229588-800-095510.00 ppb
2014-07-229588-801-09405.10 ppb
2014-07-229588-802-101515.0 ppb
2014-07-229588-803-0920ND
2014-07-229588-804-09452.30 ppb
2014-07-229588-805-100512.0 ppb
2014-07-229588-806-0915ND
2014-07-229588-807-09301.60 ppb
2014-10-229588-800-10107.50 ppb
2014-10-229588-801-09508.80 ppb
2014-10-229588-802-10305.30 ppb
2014-10-229588-803-09303.20 ppb
2014-10-229588-804-09552.90 ppb
2014-10-229588-805-10201.40 ppb
2014-10-229588-806-09152.60 ppb
2014-10-229588-807-09402.50 ppb
2015-01-229588-800-10052.60 ppb
2015-01-229588-801-09454.40 ppb
2015-01-229588-802-10256.10 ppb
2015-01-229588-803-09253.60 ppb
2015-01-229588-804-09557.50 ppb
2015-01-229588-805-10154.30 ppb
2015-01-229588-806-09152.90 ppb
2015-01-229588-807-09353.30 ppb
2015-04-219588-800-10108.20 ppb
2015-04-219588-801-09507.70 ppb
2015-04-219588-802-10307.70 ppb
2015-04-219588-803-09307.60 ppb
2015-04-219588-804-10007.90 ppb
2015-04-219588-805-10208.70 ppb
2015-04-219588-806-09205.70 ppb
2015-04-219588-807-09408.10 ppb
2015-07-229588-800-0930ND
2015-07-229588-801-09052.50 ppb
2015-07-229588-802-09458.20 ppb
2015-07-229588-803-0845ND
2015-07-229588-804-09151.30 ppb
2015-07-229588-805-09401.10 ppb
2015-07-229588-806-0830ND
2015-07-229588-807-0855ND
2015-10-229588-800-10207.40 ppb
2015-10-229588-801-10058.90 ppb
2015-10-229588-802-10459.00 ppb
2015-10-229588-803-09307.50 ppb
2015-10-229588-804-09559.50 ppb
2015-10-229588-805-10306.70 ppb
2015-10-229588-806-09207.80 ppb
2015-10-239588-807-07309.00 ppb
2016-01-229588-800-10353.80 ppb
2016-01-229588-801-10103.50 ppb
2016-01-229588-802-11054.40 ppb
2016-01-229588-803-09452.70 ppb
2016-01-229588-804-10202.60 ppb
2016-01-229588-805-10504.60 ppb
2016-01-229588-806-09303.70 ppb
2016-01-229588-807-09553.30 ppb
2016-04-219588-800-1040ND
2016-04-219588-801-1020ND
2016-04-219588-802-1105ND
2016-04-219588-803-10002.90 ppb
2016-04-219588-804-10252.20 ppb
2016-04-219588-805-1050ND
2016-04-219588-806-09504.00 ppb
2016-04-219588-807-10102.30 ppb
2016-07-229588-800-0945ND
2016-07-229588-801-0920ND
2016-07-229588-802-100511.0 ppb
2016-07-229588-803-08559.00 ppb
2016-07-229588-804-093010.00 ppb
2016-07-229588-805-09557.80 ppb
2016-07-229588-806-08455.30 ppb
2016-07-229588-807-09056.40 ppb
2016-10-249588-800-10352.00 ppb
2016-10-249588-801-10105.70 ppb
2016-10-249588-802-11003.60 ppb
2016-10-249588-803-0945ND
2016-10-249588-804-1025ND
2016-10-249588-805-10451.60 ppb
2016-10-249588-806-0935ND
2016-10-249588-807-1000ND
2017-01-259588-800-10302.80 ppb
2017-01-259588-801-10058.60 ppb
2017-01-259588-802-10552.70 ppb
2017-01-259588-803-0945ND
2017-01-259588-804-1015ND
2017-01-259588-805-10403.10 ppb
2017-01-259588-806-0930ND
2017-01-259588-807-0955ND
2017-04-219588-800-1015ND
2017-04-219588-801-09454.60 ppb
2017-04-219588-802-104514.0 ppb
2017-04-219588-803-0925ND
2017-04-219588-804-0955ND
2017-04-219588-805-103015.0 ppb
2017-04-219588-806-091516.0 ppb
2017-04-219588-807-0935ND
2017-07-249588-800-0940ND
2017-07-249588-801-09307.90 ppb
2017-07-249588-802-10102.30 ppb
2017-07-249588-803-09003.80 ppb
2017-07-249588-804-09202.50 ppb
2017-07-249588-805-09503.10 ppb
2017-07-249588-806-085016.0 ppb
2017-07-249588-807-09106.20 ppb
2017-10-239588-800-09455.40 ppb
2017-10-239588-801-093011.0 ppb
2017-10-239588-802-10004.50 ppb
2017-10-239588-803-09154.70 ppb
2017-10-239588-804-09351.50 ppb
2017-10-239588-805-09504.50 ppb
2017-10-239588-806-090511.0 ppb
2017-10-239588-807-09202.40 ppb
2018-01-229588-800-1025ND
2018-01-229588-801-10108.20 ppb
2018-01-229588-802-11056.80 ppb
2018-01-229588-803-09507.90 ppb
2018-01-229588-804-104010.00 ppb
2018-01-229588-805-10505.90 ppb
2018-01-229588-806-09409.60 ppb
2018-01-229588-807-10008.80 ppb
2018-04-239588-800-11051.80 ppb
2018-04-239588-801-10107.30 ppb
2018-04-239588-802-11201.60 ppb
2018-04-239588-803-09459.40 ppb
2018-04-239588-804-105012.0 ppb
2018-04-239588-805-11151.40 ppb
2018-04-239588-806-09159.20 ppb
2018-04-239588-807-10009.10 ppb
2018-07-239588-800-10452.70 ppb
2018-07-239588-801-10155.50 ppb
2018-07-239588-802-11053.80 ppb
2018-07-239588-803-09353.00 ppb
2018-07-239588-804-10303.40 ppb
2018-07-239588-805-10553.40 ppb
2018-07-239588-806-09257.20 ppb
2018-07-239588-807-09504.20 ppb
2018-10-229588-800-10456.10 ppb
2018-10-229588-801-10255.10 ppb
2018-10-229588-802-11052.10 ppb
2018-10-229588-803-10001.20 ppb
2018-10-229588-804-1030ND
2018-10-229588-805-1055ND
2018-10-229588-806-09455.00 ppb
2018-10-229588-807-1015ND
2019-01-229588-800-10204.90 ppb
2019-01-229588-801-09556.20 ppb
2019-01-229588-802-10552.20 ppb
2019-01-229588-803-0935ND
2019-01-229588-804-1005ND
2019-01-229588-805-1040ND
2019-01-229588-806-0915ND
2019-01-229588-807-0945ND
2019-04-229588-800-10255.20 ppb
2019-04-229588-801-10002.90 ppb
2019-04-229588-802-11005.00 ppb
2019-04-229588-803-0930ND
2019-04-229588-804-10101.30 ppb
2019-04-229588-805-10504.30 ppb
2019-04-229588-806-0920ND
2019-04-229588-807-0945ND
2019-07-229588-800-10005.10 ppb
2019-07-229588-801-09354.70 ppb
2019-07-229588-802-10304.60 ppb
2019-07-229588-803-09058.70 ppb
2019-07-229588-804-094510.00 ppb
2019-07-229588-805-10153.60 ppb
2019-07-229588-806-08555.70 ppb
2019-07-229588-807-09209.30 ppb
2019-10-229588-800-10103.80 ppb
2019-10-229588-801-09502.30 ppb
2019-10-229588-802-10352.70 ppb
2019-10-229588-803-09252.70 ppb
2019-10-229588-804-10003.60 ppb
2019-10-229588-805-10252.60 ppb
2019-10-229588-806-09102.20 ppb
2019-10-229588-807-09352.70 ppb