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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Ventura Waterworks District No. 8 - Simi Valley

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)

129

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.928 ppb3218ND - 2.90 ppb
20151.63 ppb3225ND - 3.70 ppb
20160.772 ppb327ND - 5.60 ppb
20172.28 ppb3225ND - 5.00 ppb
20182.30 ppb3230ND - 7.90 ppb
20191.48 ppb3224ND - 3.00 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
2014-01-029588-014-0949ND
2014-01-029588-015-1105ND
2014-01-029588-016-1118ND
2014-01-029588-017-0753ND
2014-01-029588-018-0809ND
2014-01-029588-019-0834ND
2014-01-029588-020-0820ND
2014-01-029588-021-0926ND
2014-04-019588-014-09491.30 ppb
2014-04-019588-015-10352.10 ppb
2014-04-019588-016-10561.70 ppb
2014-04-019588-017-08002.90 ppb
2014-04-019588-018-08182.20 ppb
2014-04-019588-019-09051.30 ppb
2014-04-019588-020-08521.90 ppb
2014-04-019588-021-09262.20 ppb
2014-07-019588-014-10202.30 ppb
2014-07-019588-015-10501.10 ppb
2014-07-019588-016-09401.90 ppb
2014-07-019588-017-08501.30 ppb
2014-07-019588-018-09101.20 ppb
2014-07-019588-019-09301.40 ppb
2014-07-019588-020-09201.30 ppb
2014-07-019588-021-10001.30 ppb
2014-09-239588-014-0825ND
2014-09-239588-015-0850ND
2014-09-239588-016-08421.20 ppb
2014-09-239588-017-07431.10 ppb
2014-09-239588-018-0759ND
2014-09-239588-019-0828ND
2014-09-239588-020-0815ND
2014-09-239588-021-0805ND
2015-01-069588-014-09251.60 ppb
2015-01-069588-015-1033ND
2015-01-069588-016-1020ND
2015-01-069588-017-0815ND
2015-01-069588-018-0830ND
2015-01-069588-019-08552.00 ppb
2015-01-069588-020-0845ND
2015-01-069588-021-0912ND
2015-04-079588-014-14181.20 ppb
2015-04-079588-015-14551.10 ppb
2015-04-079588-016-15151.90 ppb
2015-04-079588-017-13102.60 ppb
2015-04-079588-018-13202.20 ppb
2015-04-079588-019-1340ND
2015-04-079588-020-13321.40 ppb
2015-04-079588-021-13581.80 ppb
2015-07-079588-014-09252.50 ppb
2015-07-079588-015-09551.60 ppb
2015-07-079588-016-10101.60 ppb
2015-07-079588-017-07452.10 ppb
2015-07-079588-018-08002.90 ppb
2015-07-079588-019-08301.60 ppb
2015-07-079588-020-08151.90 ppb
2015-07-079588-021-09001.60 ppb
2015-10-069588-014-10433.00 ppb
2015-10-069588-015-11521.80 ppb
2015-10-069588-016-09523.70 ppb
2015-10-069588-017-08032.50 ppb
2015-10-069588-018-08182.60 ppb
2015-10-069588-019-09201.90 ppb
2015-10-069588-020-08553.00 ppb
2015-10-069588-021-10222.10 ppb
2016-01-059588-014-1020ND
2016-01-059588-015-1105ND
2016-01-059588-016-1115ND
2016-01-059588-017-0850ND
2016-01-059588-018-0910ND
2016-01-059588-019-0945ND
2016-01-059588-020-0933ND
2016-01-059588-021-1000ND
2016-04-059588-014-0920ND
2016-04-059588-015-1000ND
2016-04-059588-016-0945ND
2016-04-059588-017-0805ND
2016-04-059588-018-0820ND
2016-04-059588-019-0840ND
2016-04-059588-020-0830ND
2016-04-059588-021-0905ND
2016-07-059588-014-0922ND
2016-07-059588-015-1030ND
2016-07-059588-016-0930ND
2016-07-059588-017-0755ND
2016-07-059588-018-0818ND
2016-07-059588-019-0844ND
2016-07-059588-020-0833ND
2016-07-059588-021-0905ND
2016-10-069588-014-10102.70 ppb
2016-10-069588-015-1030ND
2016-10-069588-016-10453.80 ppb
2016-10-069588-017-08462.20 ppb
2016-10-069588-018-08585.60 ppb
2016-10-069588-019-09303.40 ppb
2016-10-069588-020-09204.30 ppb
2016-10-069588-021-09502.70 ppb
2017-01-049588-014-10001.10 ppb
2017-01-049588-015-1024ND
2017-01-049588-016-10482.30 ppb
2017-01-049588-017-08221.50 ppb
2017-01-049588-018-08501.20 ppb
2017-01-049588-019-09142.00 ppb
2017-01-049588-020-09001.40 ppb
2017-01-049588-021-09412.30 ppb
2017-04-049588-014-09374.50 ppb
2017-04-049588-015-10144.20 ppb
2017-04-049588-016-10535.00 ppb
2017-04-049588-017-10534.50 ppb
2017-04-049588-018-08324.30 ppb
2017-04-049588-019-08583.10 ppb
2017-04-049588-020-08484.50 ppb
2017-04-049588-021-09194.30 ppb
2017-07-059588-014-1035ND
2017-07-059588-015-1103ND
2017-07-059588-016-11201.90 ppb
2017-07-059588-017-0830ND
2017-07-059588-018-08541.30 ppb
2017-07-059588-019-0930ND
2017-07-059588-020-0915ND
2017-07-059588-021-10101.30 ppb
2017-10-049588-014-15143.80 ppb
2017-10-049588-015-1544ND
2017-10-049588-016-15554.40 ppb
2017-10-049588-017-13503.00 ppb
2017-10-049588-018-14072.60 ppb
2017-10-049588-019-14332.50 ppb
2017-10-049588-020-14203.00 ppb
2017-10-049588-021-14563.10 ppb
2018-01-109588-014-11352.60 ppb
2018-01-109588-015-13101.70 ppb
2018-01-109588-016-12452.30 ppb
2018-01-109588-017-08231.80 ppb
2018-01-109588-018-08542.90 ppb
2018-01-109588-019-10001.20 ppb
2018-01-109588-020-09302.60 ppb
2018-01-109588-021-10551.40 ppb
2018-04-049588-014-08565.10 ppb
2018-04-049588-015-09526.10 ppb
2018-04-049588-016-10357.90 ppb
2018-04-049588-017-11382.70 ppb
2018-04-049588-018-11231.10 ppb
2018-04-049588-019-10494.40 ppb
2018-04-049588-020-11014.30 ppb
2018-04-049588-021-09316.50 ppb
2018-07-039588-014-09301.30 ppb
2018-07-039588-015-10001.50 ppb
2018-07-039588-016-10152.10 ppb
2018-07-039588-017-08151.60 ppb
2018-07-039588-018-08301.40 ppb
2018-07-039588-019-08551.10 ppb
2018-07-039588-020-08401.000 ppb
2018-07-039588-021-09151.20 ppb
2018-10-049588-014-10381.90 ppb
2018-10-049588-015-1121ND
2018-10-049588-016-12001.40 ppb
2018-10-049588-017-08001.20 ppb
2018-10-049588-018-08201.000 ppb
2018-10-049588-019-09151.10 ppb
2018-10-049588-020-08451.10 ppb
2018-10-049588-021-0940ND
2019-01-029588-014-1001ND
2019-01-029588-015-1042ND
2019-01-029588-016-1033ND
2019-01-029588-017-0900ND
2019-01-029588-018-0915ND
2019-01-029588-019-0935ND
2019-01-029588-020-0925ND
2019-01-029588-021-0955ND
2019-04-049588-014-10503.00 ppb
2019-04-049588-015-11201.10 ppb
2019-04-049588-016-11402.10 ppb
2019-04-049588-017-08301.80 ppb
2019-04-049588-018-09152.20 ppb
2019-04-049588-019-10002.50 ppb
2019-04-049588-020-09402.30 ppb
2019-04-049588-021-10302.50 ppb
2019-07-119588-014-11122.30 ppb
2019-07-119588-015-11401.70 ppb
2019-07-119588-016-11552.40 ppb
2019-07-119588-017-09482.80 ppb
2019-07-119588-018-10152.60 ppb
2019-07-119588-019-10351.90 ppb
2019-07-119588-020-10222.40 ppb
2019-07-119588-021-10521.20 ppb
2019-10-029588-014-10452.10 ppb
2019-10-029588-015-11151.10 ppb
2019-10-029588-016-11402.30 ppb
2019-10-029588-017-08272.10 ppb
2019-10-029588-018-08501.80 ppb
2019-10-029588-019-09451.000 ppb
2019-10-029588-020-09151.10 ppb
2019-10-029588-021-10151.10 ppb