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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Aqua Water Supply Corporation

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)

74

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.06 ppb16161.000 ppb - 3.70 ppb
20152.23 ppb1613ND - 5.10 ppb
20162.51 ppb1612ND - 5.70 ppb
20172.56 ppb1613ND - 6.30 ppb
20182.33 ppb1610ND - 7.60 ppb
20192.12 ppb1610ND - 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
2014-03-10AC462161.90 ppb
2014-03-10AC462141.70 ppb
2014-03-10AC462151.10 ppb
2014-03-10AC462181.60 ppb
2014-04-14AC503942.00 ppb
2014-04-14AC503562.70 ppb
2014-04-14AC503951.30 ppb
2014-04-14AC503492.00 ppb
2014-08-13AC635732.30 ppb
2014-08-13AC635611.000 ppb
2014-08-13AC635641.60 ppb
2014-08-13AC635623.00 ppb
2014-10-22AC703133.60 ppb
2014-10-22AC703122.30 ppb
2014-10-22AC703091.20 ppb
2014-10-22AC703083.70 ppb
2015-02-09AC796862.00 ppb
2015-02-09AC796871.20 ppb
2015-02-09AC79685ND
2015-02-09AC796843.90 ppb
2015-04-13AC879571.60 ppb
2015-04-13AC87959ND
2015-04-13AC879565.10 ppb
2015-04-14AC880991.70 ppb
2015-07-10AC990283.00 ppb
2015-07-10AC990312.60 ppb
2015-07-10AC99029ND
2015-07-10AC990304.40 ppb
2015-10-15AD108063.00 ppb
2015-10-15AD108051.80 ppb
2015-10-15AD108031.10 ppb
2015-10-15AD108044.30 ppb
2016-01-26AD200654.20 ppb
2016-01-26AD20049ND
2016-01-26AD200531.40 ppb
2016-01-26AD200592.10 ppb
2016-04-19AD334422.40 ppb
2016-04-19AD334431.80 ppb
2016-04-19AD33444ND
2016-04-19AD334455.40 ppb
2016-07-26AD456413.00 ppb
2016-07-26AD45656ND
2016-07-26AD45657ND
2016-07-26AD456445.70 ppb
2016-10-18AD535465.20 ppb
2016-10-18AD535534.80 ppb
2016-10-18AD535472.80 ppb
2016-10-18AD535441.40 ppb
2017-01-11AD64282ND
2017-01-11AD642831.40 ppb
2017-01-12AD647061.30 ppb
2017-01-12AD647055.40 ppb
2017-04-05AD785232.50 ppb
2017-04-05AD785211.80 ppb
2017-04-05AD785261.10 ppb
2017-04-05AD785285.50 ppb
2017-09-18AD96505ND
2017-09-18AD965095.10 ppb
2017-09-18AD965042.10 ppb
2017-09-18AD965083.30 ppb
2017-10-25AE020783.00 ppb
2017-10-25AE020912.20 ppb
2017-10-25AE02076ND
2017-10-25AE020776.30 ppb
2018-01-25AE105232.10 ppb
2018-01-25AE10478ND
2018-01-25AE10492ND
2018-01-25AE105045.10 ppb
2018-04-09AE216226.20 ppb
2018-04-09AE21626ND
2018-04-09AE216272.60 ppb
2018-04-09AE216321.20 ppb
2018-08-24AE384122.50 ppb
2018-08-24AE38411ND
2018-08-24AE38407ND
2018-08-24AE384135.00 ppb
2018-10-16AE435913.80 ppb
2018-10-16AE435901.10 ppb
2018-10-16AE43589ND
2018-10-16AE435887.60 ppb
2019-03-15AE585311.000 ppb
2019-03-15AE585293.80 ppb
2019-03-15AE58528ND
2019-03-15AE585301.50 ppb
2019-05-15AE664712.10 ppb
2019-05-15AE66470ND
2019-05-15AE664841.000 ppb
2019-05-15AE664684.70 ppb
2019-08-16AE791081.40 ppb
2019-08-16AE79107ND
2019-08-16AE79105ND
2019-08-16AE791047.50 ppb
2019-11-15AE893417.10 ppb
2019-11-15AE893393.80 ppb
2019-11-15AE89340ND
2019-11-15AE89338ND