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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Vallecitos Water District

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

 

184

Samples

0

Samples exceeding legal limit (MCL)

163

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.05 ppb32321.90 ppb - 7.70 ppb
20154.89 ppb32321.90 ppb - 7.80 ppb
20162.39 ppb3224ND - 7.50 ppb
20174.58 ppb3229ND - 20.0 ppb
20181.83 ppb3223ND - 9.10 ppb
20193.17 ppb2423ND - 9.10 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
2014-01-152706-900-09152.60 ppb
2014-01-152706-901-11003.40 ppb
2014-01-152706-902-09403.10 ppb
2014-01-152706-903-10252.80 ppb
2014-01-152706-904-10153.20 ppb
2014-01-152706-905-08452.50 ppb
2014-01-152706-906-09052.80 ppb
2014-01-152706-907-08103.60 ppb
2014-04-162706-900-09105.20 ppb
2014-04-162706-901-07306.30 ppb
2014-04-162706-902-11106.10 ppb
2014-04-162706-903-10405.20 ppb
2014-04-162706-904-09504.80 ppb
2014-04-162706-905-08405.30 ppb
2014-04-162706-906-11403.50 ppb
2014-04-162706-907-12005.30 ppb
2014-07-162706-900-10352.20 ppb
2014-07-162706-901-11253.30 ppb
2014-07-162706-902-08253.10 ppb
2014-07-162706-903-07502.40 ppb
2014-07-162706-904-10003.40 ppb
2014-07-162706-905-10552.50 ppb
2014-07-162706-906-08552.10 ppb
2014-07-162706-907-09301.90 ppb
2014-10-152706-900-11455.30 ppb
2014-10-152706-901-10107.70 ppb
2014-10-152706-902-12154.60 ppb
2014-10-152706-903-11455.90 ppb
2014-10-152706-904-11006.50 ppb
2014-10-152706-905-11155.30 ppb
2014-10-152706-906-10153.80 ppb
2014-10-152706-907-10504.00 ppb
2015-01-212706-900-10504.80 ppb
2015-01-212706-901-09004.90 ppb
2015-01-212706-902-11004.40 ppb
2015-01-212706-903-11303.20 ppb
2015-01-212706-904-11154.40 ppb
2015-01-212706-905-09553.80 ppb
2015-01-212706-906-10303.10 ppb
2015-01-212706-907-10002.40 ppb
2015-04-152706-900-09105.10 ppb
2015-04-152706-901-08306.60 ppb
2015-04-152706-902-08505.40 ppb
2015-04-152706-903-08055.10 ppb
2015-04-152706-904-10005.90 ppb
2015-04-152706-905-09305.20 ppb
2015-04-152706-906-09403.40 ppb
2015-04-152706-907-10154.50 ppb
2015-07-150007-900-10155.70 ppb
2015-07-150007-901-09201.90 ppb
2015-07-150007-902-09106.60 ppb
2015-07-150007-903-08405.90 ppb
2015-07-150007-904-11255.90 ppb
2015-07-150007-905-10456.20 ppb
2015-07-150007-906-09404.60 ppb
2015-07-150007-907-12452.20 ppb
2015-10-212706-900-08357.20 ppb
2015-10-212706-901-09403.70 ppb
2015-10-212706-902-09007.80 ppb
2015-10-212706-903-09306.60 ppb
2015-10-212706-904-07553.30 ppb
2015-10-212706-905-09156.20 ppb
2015-10-212706-906-10056.60 ppb
2015-10-212706-907-10404.00 ppb
2016-01-202706-900-10155.90 ppb
2016-01-202706-901-09102.70 ppb
2016-01-202706-902-10151.30 ppb
2016-01-202706-903-1105ND
2016-01-202706-904-11205.50 ppb
2016-01-202706-905-09406.80 ppb
2016-01-202706-906-09404.30 ppb
2016-01-202706-907-09102.90 ppb
2016-04-202706-900-09503.40 ppb
2016-04-202706-901-09052.60 ppb
2016-04-202706-902-1000ND
2016-04-202706-903-0850ND
2016-04-202706-904-11003.20 ppb
2016-04-202706-905-10352.90 ppb
2016-04-202706-906-09255.00 ppb
2016-04-202706-907-0950ND
2016-07-202706-900-09251.20 ppb
2016-07-202706-901-10251.60 ppb
2016-07-202706-902-1000ND
2016-07-202706-903-09401.10 ppb
2016-07-202706-904-08451.40 ppb
2016-07-202706-905-09451.40 ppb
2016-07-202706-906-10407.50 ppb
2016-07-202706-907-1115ND
2016-10-192706-900-09501.50 ppb
2016-10-192706-901-0900ND
2016-10-192706-902-1000ND
2016-10-192706-903-10301.70 ppb
2016-10-192706-904-11001.30 ppb
2016-10-192706-905-10253.60 ppb
2016-10-192706-906-09306.50 ppb
2016-10-192706-907-09001.10 ppb
2017-01-180007-900-10003.40 ppb
2017-01-180007-901-10302.70 ppb
2017-01-180007-902-0950ND
2017-01-180007-903-0925ND
2017-01-180007-904-12402.90 ppb
2017-01-180007-905-09304.10 ppb
2017-01-180007-906-10501.40 ppb
2017-01-180007-907-1120ND
2017-04-190007-900-10007.20 ppb
2017-04-190007-901-08304.20 ppb
2017-04-190007-902-08408.90 ppb
2017-04-190007-903-080010.00 ppb
2017-04-190007-904-10459.30 ppb
2017-04-190007-905-09209.20 ppb
2017-04-190007-906-092020.0 ppb
2017-04-190007-907-09406.00 ppb
2017-07-190007-900-09206.00 ppb
2017-07-190007-901-07452.00 ppb
2017-07-190007-902-07454.60 ppb
2017-07-190007-903-09302.40 ppb
2017-07-190007-904-09456.90 ppb
2017-07-190007-905-09002.90 ppb
2017-07-190007-906-08153.90 ppb
2017-07-190007-907-08453.90 ppb
2017-10-180007-900-10002.80 ppb
2017-10-180007-901-09202.40 ppb
2017-10-180007-902-09003.00 ppb
2017-10-180007-903-08202.10 ppb
2017-10-180007-904-11003.00 ppb
2017-10-180007-905-08403.20 ppb
2017-10-180007-906-09256.60 ppb
2017-10-180007-907-07501.40 ppb
2018-01-170007-900-10502.70 ppb
2018-01-170007-901-0910ND
2018-01-170007-902-08552.40 ppb
2018-01-170007-903-08301.90 ppb
2018-01-170007-904-1125ND
2018-01-170007-905-09452.70 ppb
2018-01-170007-906-09309.10 ppb
2018-01-170007-907-1000ND
2018-04-180007-900-09451.10 ppb
2018-04-180007-901-08301.50 ppb
2018-04-180007-902-10151.10 ppb
2018-04-180007-903-0945ND
2018-04-180007-904-1030ND
2018-04-180007-905-0930ND
2018-04-180007-906-10553.70 ppb
2018-04-180007-907-11251.60 ppb
2018-07-180007-900-08501.90 ppb
2018-07-180007-901-08502.10 ppb
2018-07-180007-902-08552.40 ppb
2018-07-180007-903-08302.00 ppb
2018-07-180007-904-07552.20 ppb
2018-07-180007-905-08302.10 ppb
2018-07-180007-906-09404.20 ppb
2018-07-180007-907-07303.20 ppb
2018-10-170007-900-10101.40 ppb
2018-10-170007-901-0840ND
2018-10-170007-902-08301.20 ppb
2018-10-170007-903-0800ND
2018-10-170007-904-1040ND
2018-10-170007-905-09301.50 ppb
2018-10-170007-906-09005.20 ppb
2018-10-170007-907-09351.30 ppb
2019-01-160007-900-11055.00 ppb
2019-01-160007-901-09402.90 ppb
2019-01-160007-902-09504.20 ppb
2019-01-160007-903-09005.40 ppb
2019-01-160007-904-11502.40 ppb
2019-01-160007-905-10356.20 ppb
2019-01-160007-906-10405.20 ppb
2019-01-160007-907-11051.80 ppb
2019-04-170007-900-10503.10 ppb
2019-04-170007-901-08401.70 ppb
2019-04-170007-902-09152.40 ppb
2019-04-170007-903-09252.90 ppb
2019-04-170007-904-08452.90 ppb
2019-04-170007-905-10304.80 ppb
2019-04-170007-906-08309.10 ppb
2019-04-170007-907-13102.40 ppb
2019-07-170007-900-10102.10 ppb
2019-07-170007-901-09301.40 ppb
2019-07-170007-902-10052.60 ppb
2019-07-170007-903-10552.20 ppb
2019-07-170007-904-11101.90 ppb
2019-07-170007-905-08152.10 ppb
2019-07-170007-906-09251.40 ppb
2019-07-170007-907-0830ND