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EWG's Tap Water Database — 2019 UPDATE

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Dichloroacetic acid

Oak Park Water Service

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

65

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.41 ppb1210ND - 2.50 ppb
20130.575 ppb167ND - 2.20 ppb
20141.57 ppb1611ND - 3.20 ppb
20152.02 ppb2017ND - 3.20 ppb
20160.825 ppb165ND - 3.20 ppb
20172.89 ppb1615ND - 5.00 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
2012-04-039588-004-09542.20 ppb
2012-04-039588-002-09291.000 ppb
2012-04-039588-003-1050ND
2012-04-039588-005-11002.00 ppb
2012-07-249588-003-08101.000 ppb
2012-07-249588-005-0759ND
2012-07-249588-002-07431.000 ppb
2012-07-249588-004-07131.40 ppb
2012-10-049588-003-07292.50 ppb
2012-10-049588-005-07391.50 ppb
2012-10-049588-002-07172.10 ppb
2012-10-049588-004-07092.20 ppb
2013-02-059588-002-10051.20 ppb
2013-02-059588-003-08401.30 ppb
2013-02-059588-005-08251.000 ppb
2013-02-059588-004-08001.40 ppb
2013-04-029588-002-1030ND
2013-04-029588-003-0950ND
2013-04-029588-004-0915ND
2013-04-029588-005-0935ND
2013-07-039588-002-09552.20 ppb
2013-07-039588-005-1030ND
2013-07-039588-003-1010ND
2013-07-039588-004-0930ND
2013-10-019588-004-07251.10 ppb
2013-10-019588-002-0745ND
2013-10-019588-005-0830ND
2013-10-019588-003-08001.000 ppb
2014-01-079588-004-08091.60 ppb
2014-01-079588-005-08351.50 ppb
2014-01-079588-002-0856ND
2014-01-079588-003-08231.30 ppb
2014-04-019588-003-08282.40 ppb
2014-04-019588-002-08123.20 ppb
2014-04-019588-005-08422.50 ppb
2014-04-019588-004-07422.80 ppb
2014-07-089588-005-08252.20 ppb
2014-07-089588-002-07502.60 ppb
2014-07-089588-003-08052.40 ppb
2014-07-089588-004-07252.60 ppb
2014-10-079588-002-0742ND
2014-10-079588-005-0810ND
2014-10-079588-003-0754ND
2014-10-079588-004-0818ND
2015-01-079588-002-09001.40 ppb
2015-01-079588-005-0945ND
2015-01-079588-004-1035ND
2015-01-079588-003-0925ND
2015-04-079588-002-08452.30 ppb
2015-04-079588-003-10481.90 ppb
2015-04-079588-004-10152.70 ppb
2015-04-079588-005-10482.30 ppb
2015-07-079588-002-14431.90 ppb
2015-07-079588-003-13572.00 ppb
2015-07-079588-004-13462.00 ppb
2015-07-079588-005-14102.00 ppb
2015-10-069588-005-09303.20 ppb
2015-10-069588-003-09503.00 ppb
2015-10-069588-004-11453.00 ppb
2015-10-069588-002-10353.20 ppb
2015-12-019588-004-11242.50 ppb
2015-12-019588-003-10362.30 ppb
2015-12-019588-002-09082.30 ppb
2015-12-019588-005-10512.30 ppb
2016-01-059588-002-0920ND
2016-01-059588-003-0900ND
2016-01-059588-005-1000ND
2016-01-059588-004-08401.10 ppb
2016-04-059588-004-1155ND
2016-04-059588-005-1245ND
2016-04-059588-003-1230ND
2016-04-059588-002-1215ND
2016-07-059588-005-1255ND
2016-07-059588-002-1155ND
2016-07-059588-004-1047ND
2016-07-059588-003-1240ND
2016-10-049588-005-10102.90 ppb
2016-10-049588-002-09253.20 ppb
2016-10-049588-003-09503.00 ppb
2016-10-049588-004-09003.00 ppb
2017-01-039588-003-10212.20 ppb
2017-01-039588-002-09492.30 ppb
2017-01-039588-005-11182.40 ppb
2017-01-039588-004-10522.90 ppb
2017-04-049588-003-13103.20 ppb
2017-04-049588-002-12453.20 ppb
2017-04-049588-004-11553.00 ppb
2017-04-049588-005-13253.50 ppb
2017-07-119588-005-09072.20 ppb
2017-07-119588-002-1019ND
2017-07-119588-003-09201.20 ppb
2017-07-119588-004-08352.40 ppb
2017-10-039588-005-11034.70 ppb
2017-10-039588-002-11524.20 ppb
2017-10-039588-003-10483.90 ppb
2017-10-039588-004-10205.00 ppb