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EWG's Tap Water Database — 2019 UPDATE

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Dichloroacetic acid

East Rio Hondo WSC

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.

 

93

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20125.93 ppb1310ND - 9.40 ppb
20135.37 ppb1611ND - 14.9 ppb
20147.47 ppb1611ND - 15.6 ppb
20157.14 ppb1615ND - 9.30 ppb
20164.33 ppb1614ND - 6.80 ppb
20174.66 ppb1612ND - 7.50 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
2012-01-1012011930056.40 ppb
2012-05-3012058750088.70 ppb
2012-05-301205875007ND
2012-05-3012058750066.70 ppb
2012-05-3012058750057.00 ppb
2012-07-1712075910149.00 ppb
2012-07-171207591013ND
2012-07-1712075910127.40 ppb
2012-07-1712075910119.40 ppb
2012-10-1812106550066.90 ppb
2012-10-1812106550058.20 ppb
2012-10-181210655007ND
2012-10-1812106550087.40 ppb
2013-01-17AC082396.60 ppb
2013-01-17AC08240ND
2013-01-17AC082376.20 ppb
2013-01-17AC082384.80 ppb
2013-04-05AC159636.00 ppb
2013-04-05AC159676.60 ppb
2013-04-05AC159665.40 ppb
2013-04-05AC15961ND
2013-09-10AC29669ND
2013-09-10AC2966614.9 ppb
2013-09-10AC2966812.1 ppb
2013-09-10AC29664ND
2013-10-21AC3270710.4 ppb
2013-10-21AC32676ND
2013-10-21AC326787.50 ppb
2013-10-21AC326775.40 ppb
2014-03-06AC4593311.8 ppb
2014-03-06AC45939ND
2014-03-06AC4597110.6 ppb
2014-03-06AC4593512.2 ppb
2014-06-06AC56282ND
2014-06-06AC5628515.6 ppb
2014-06-06AC5631215.2 ppb
2014-06-06AC5631313.5 ppb
2014-09-09AC664139.00 ppb
2014-09-09AC66372ND
2014-09-09AC664128.90 ppb
2014-09-09AC663738.20 ppb
2014-11-20AC726618.00 ppb
2014-11-20AC72644ND
2014-11-20AC726426.50 ppb
2014-11-20AC72650ND
2015-03-18AC849708.00 ppb
2015-03-18AC849817.90 ppb
2015-03-18AC849736.90 ppb
2015-03-18AC849778.00 ppb
2015-06-17AC962477.00 ppb
2015-06-17AC962497.70 ppb
2015-06-17AC962756.10 ppb
2015-06-17AC962487.50 ppb
2015-09-23AD081878.20 ppb
2015-09-23AD08202ND
2015-09-23AD081848.00 ppb
2015-09-23AD081884.90 ppb
2015-12-01AD148569.00 ppb
2015-12-01AD148558.00 ppb
2015-12-01AD149067.70 ppb
2015-12-01AD148599.30 ppb
2016-02-25AD256785.10 ppb
2016-02-25AD256991.30 ppb
2016-02-25AD257045.90 ppb
2016-02-25AD256794.20 ppb
2016-05-17AD369895.10 ppb
2016-05-17AD36990ND
2016-05-17AD369875.20 ppb
2016-05-17AD369883.30 ppb
2016-09-27AD514836.00 ppb
2016-09-27AD514846.30 ppb
2016-09-27AD514376.80 ppb
2016-09-27AD51454ND
2016-12-09AD616236.30 ppb
2016-12-09AD616221.90 ppb
2016-12-09AD616245.40 ppb
2016-12-09AD616216.40 ppb
2017-03-03AD734106.20 ppb
2017-03-03AD734095.50 ppb
2017-03-03AD73408ND
2017-03-03AD734075.30 ppb
2017-05-19AD850324.70 ppb
2017-05-19AD85029ND
2017-05-19AD850355.20 ppb
2017-05-19AD850366.30 ppb
2017-09-07AD951047.50 ppb
2017-09-07AD95099ND
2017-09-07AD951036.10 ppb
2017-09-07AD951156.90 ppb
2017-11-30AE063306.40 ppb
2017-11-30AE06326ND
2017-11-30AE063297.30 ppb
2017-11-30AE063227.10 ppb