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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

SJWTX Triple Peak Plant

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

77

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20145.45 ppb1613ND - 10.8 ppb
20159.83 ppb1613ND - 30.7 ppb
20162.24 ppb167ND - 20.2 ppb
20172.51 ppb1615ND - 4.80 ppb
20182.74 ppb1613ND - 7.30 ppb
20193.35 ppb16161.50 ppb - 5.40 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
2014-02-18AC433198.30 ppb
2014-02-18AC433099.60 ppb
2014-02-18AC43327ND
2014-02-18AC4333210.8 ppb
2014-04-17AC510577.70 ppb
2014-04-17AC510566.30 ppb
2014-04-17AC51055ND
2014-04-17AC510346.60 ppb
2014-07-24AC609367.10 ppb
2014-07-24AC609394.50 ppb
2014-07-24AC609525.90 ppb
2014-07-24AC609377.50 ppb
2014-11-14AC721427.00 ppb
2014-11-14AC721842.90 ppb
2014-11-14AC72160ND
2014-11-14AC721593.00 ppb
2015-01-16AC769275.60 ppb
2015-01-16AC769394.20 ppb
2015-01-16AC76935ND
2015-01-16AC769457.30 ppb
2015-06-03AC943701.40 ppb
2015-06-03AC94371ND
2015-06-03AC943721.60 ppb
2015-06-03AC943691.50 ppb
2015-08-05AD0257730.7 ppb
2015-08-05AD0258720.3 ppb
2015-08-05AD0257822.9 ppb
2015-08-05AD0257922.1 ppb
2015-11-03AD1238713.7 ppb
2015-11-03AD1244413.3 ppb
2015-11-03AD12384ND
2015-11-03AD1234512.7 ppb
2016-01-26AD20057ND
2016-01-26AD200402.20 ppb
2016-01-26AD200468.20 ppb
2016-01-26AD2003120.2 ppb
2016-04-22AD33941ND
2016-04-22AD33943ND
2016-04-22AD33942ND
2016-04-22AD33940ND
2016-07-26AD45670ND
2016-07-26AD45677ND
2016-07-26AD45669ND
2016-07-26AD45668ND
2016-10-04AD524261.10 ppb
2016-10-04AD524291.80 ppb
2016-10-04AD524301.20 ppb
2016-10-04AD524331.10 ppb
2017-02-01AD680502.10 ppb
2017-02-01AD680591.60 ppb
2017-02-01AD68051ND
2017-02-01AD680611.000 ppb
2017-05-03AD827083.60 ppb
2017-05-03AD827063.10 ppb
2017-05-03AD827071.30 ppb
2017-06-26AD877773.40 ppb
2017-07-27AD910373.20 ppb
2017-07-27AD910363.40 ppb
2017-07-27AD910403.70 ppb
2017-07-27AD910504.80 ppb
2017-11-27AE057302.90 ppb
2017-11-27AE057292.50 ppb
2017-11-27AE057282.20 ppb
2017-11-27AE057271.40 ppb
2018-02-06AE124743.30 ppb
2018-02-06AE124653.10 ppb
2018-02-06AE12467ND
2018-02-06AE124682.50 ppb
2018-04-23AE234292.20 ppb
2018-04-23AE234412.70 ppb
2018-04-23AE234353.70 ppb
2018-04-23AE234303.10 ppb
2018-07-24AE342774.40 ppb
2018-07-24AE342803.00 ppb
2018-07-24AE34278ND
2018-07-24AE342792.40 ppb
2018-11-06AE453672.50 ppb
2018-11-06AE453713.60 ppb
2018-11-06AE45368ND
2018-11-06AE453667.30 ppb
2019-02-12AE542071.90 ppb
2019-02-12AE542045.40 ppb
2019-02-12AE542052.30 ppb
2019-02-12AE542063.50 ppb
2019-05-22AE676562.80 ppb
2019-05-22AE676583.80 ppb
2019-05-22AE676591.60 ppb
2019-05-22AE676574.80 ppb
2019-07-01AE728054.20 ppb
2019-07-01AE728044.90 ppb
2019-07-01AE728033.00 ppb
2019-07-01AE728083.20 ppb
2019-10-15AE867353.10 ppb
2019-10-15AE867344.10 ppb
2019-10-15AE867333.50 ppb
2019-10-15AE867361.50 ppb