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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Rockingham, City of

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

 

68

Samples

0

Samples exceeding legal limit (MCL)

51

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201420.8 ppb884.00 ppb - 44.0 ppb
20159.13 ppb83ND - 37.0 ppb
20160.625 ppb82ND - 3.00 ppb
20172.58 ppb12121.000 ppb - 4.00 ppb
20181.75 ppb1615ND - 4.00 ppb
20191.50 ppb1611ND - 4.00 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
2014-01-1037729_14-0134836.0 ppb
2014-01-1037729_14-0133844.0 ppb
2014-04-0237729_14-0935227.0 ppb
2014-04-0237729_14-0935128.0 ppb
2014-07-0237729_14-201378.00 ppb
2014-07-0237729_14-201389.00 ppb
2014-10-0837729_14-3066710.00 ppb
2014-10-0837729_14-306684.00 ppb
2015-01-0735.0 ppb
2015-01-0737.0 ppb
2015-04-081.000 ppb
2015-04-08ND
2015-07-08ND
2015-07-08ND
2015-10-07ND
2015-10-07ND
2016-01-0637729_16-00475ND
2016-01-0637729_16-00473ND
2016-04-0637729_16-10734ND
2016-04-0637729_16-10737ND
2016-07-0737729_16-22195ND
2016-07-0737729_16-22196ND
2016-10-0537729_16-349213.00 ppb
2016-10-0537729_16-349232.00 ppb
2017-01-0437729_17-003631.000 ppb
2017-01-0437729_17-003641.000 ppb
2017-04-1037729_17-118352.00 ppb
2017-04-1037729_17-118362.00 ppb
2017-07-1037729_17-233094.00 ppb
2017-07-1037729_17-233104.00 ppb
2017-07-1037729_17-233114.00 ppb
2017-07-1037729_17-233124.00 ppb
2017-10-1037729_17-379692.00 ppb
2017-10-1037729_17-379682.00 ppb
2017-10-1037729_17-379663.00 ppb
2017-10-1037729_17-379672.00 ppb
2018-01-0937729_18-00829 1.000 ppb
2018-01-0937729_18-00828 1.000 ppb
2018-01-0937729_18-00825 ND
2018-01-0937729_18-00823 1.000 ppb
2018-04-1037729_18-13836 1.000 ppb
2018-04-1037729_18-13825 2.00 ppb
2018-04-1037729_18-13834 1.000 ppb
2018-04-1037729_18-13835 1.000 ppb
2018-07-1037729_18-27736 4.00 ppb
2018-07-1037729_18-27735 4.00 ppb
2018-07-1037729_18-27734 2.00 ppb
2018-07-1037729_18-27730 2.00 ppb
2018-10-0937729_18-41996 2.00 ppb
2018-10-0937729_18-41997 2.00 ppb
2018-10-0937729_18-41998 2.00 ppb
2018-10-0937729_18-41999 2.00 ppb
2019-01-0837729_19-01152 ND
2019-01-0837729_19-01153 ND
2019-01-0837729_19-01154 ND
2019-01-0837729_19-01155 ND
2019-04-0937729_19-14470 4.00 ppb
2019-04-0937729_19-14477 4.00 ppb
2019-04-0937729_19-14476 2.00 ppb
2019-04-0937729_19-14475 3.00 ppb
2019-07-0937729_19-28485 2.00 ppb
2019-07-0937729_19-28487 2.00 ppb
2019-07-0937729_19-28486 2.00 ppb
2019-07-0937729_19-28484 2.00 ppb
2019-10-0737729_19-43309 ND
2019-10-0737729_19-43308 1.000 ppb
2019-10-0737729_19-43307 1.000 ppb
2019-10-0737729_19-43306 1.000 ppb