Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dichloroacetic acid

Regional Water Authority

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

 

240

Samples

0

Samples exceeding legal limit (MCL)

239

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201414.1 ppb48483.40 ppb - 24.1 ppb
2015N/A00N/A
201613.7 ppb4847ND - 28.7 ppb
201714.3 ppb48480.700 ppb - 24.7 ppb
201815.8 ppb48483.40 ppb - 25.9 ppb
201910.7 ppb48482.60 ppb - 15.6 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
2014-03-04DBP 20039195411.7 ppb
2014-03-04DBP 20039195911.9 ppb
2014-03-04DBP 20039197413.1 ppb
2014-03-05DBP 20039209215.0 ppb
2014-03-05DBP 20039209313.6 ppb
2014-03-05DBP 2003920949.30 ppb
2014-03-06DBP 2003921526.00 ppb
2014-03-06DBP 20039220115.3 ppb
2014-03-06DBP 20039220212.5 ppb
2014-03-07DBP 20039230611.2 ppb
2014-03-07DBP 20039230713.1 ppb
2014-03-07DBP 20039230816.6 ppb
2014-06-02DBP 20039694820.4 ppb
2014-06-02DBP 20039694918.9 ppb
2014-06-02DBP 2003969508.70 ppb
2014-06-03DBP 20039695914.3 ppb
2014-06-03DBP 20039696414.6 ppb
2014-06-03DBP 20039698216.0 ppb
2014-06-03DBP 20039707315.6 ppb
2014-06-05DBP 2003972298.30 ppb
2014-06-05DBP 20039732717.2 ppb
2014-06-05DBP 20039732824.1 ppb
2014-06-06DBP 20039735420.9 ppb
2014-06-06DBP 20039735521.1 ppb
2014-09-02DBP 20040327212.9 ppb
2014-09-02DBP 20040327715.6 ppb
2014-09-02DBP 20040330214.8 ppb
2014-09-03DBP 20040347018.8 ppb
2014-09-03DBP 20040347113.6 ppb
2014-09-03DBP 20040347213.6 ppb
2014-09-04DBP 2004035178.60 ppb
2014-09-04DBP 20040355615.9 ppb
2014-09-04DBP 20040355716.7 ppb
2014-09-04DBP 20040355818.4 ppb
2014-09-06DBP 2004036874.80 ppb
2014-09-06DBP 20040368812.8 ppb
2014-12-02DBP 20040868311.2 ppb
2014-12-02DBP 20040868812.4 ppb
2014-12-02DBP 20040870614.5 ppb
2014-12-02DBP 20040874816.7 ppb
2014-12-02DBP 20040874918.4 ppb
2014-12-02DBP 2004087509.40 ppb
2014-12-03DBP 2004088563.40 ppb
2014-12-03DBP 20040885721.0 ppb
2014-12-04DBP 2004089465.60 ppb
2014-12-04DBP 20040896814.6 ppb
2014-12-04DBP 20040896916.9 ppb
2014-12-04DBP 20040897015.0 ppb
2016-03-01DBP 20043442010.1 ppb
2016-03-01DBP 2004344329.30 ppb
2016-03-01DBP 20043443910.4 ppb
2016-03-01DBP 20043451813.6 ppb
2016-03-02DBP 20043465211.0 ppb
2016-03-02DBP 20043465313.4 ppb
2016-03-03DBP 2004347055.20 ppb
2016-03-03DBP 2004347345.50 ppb
2016-03-03DBP 20043479012.6 ppb
2016-03-03DBP 20043479112.5 ppb
2016-03-04DBP 20043481914.1 ppb
2016-03-04DBP 20043482012.8 ppb
2016-06-01DBP 20044102512.5 ppb
2016-06-01DBP 20044102615.8 ppb
2016-06-01DBP 20044103715.8 ppb
2016-06-01DBP 20044105420.9 ppb
2016-06-01DBP 20044105519.1 ppb
2016-06-01DBP 20044105610.8 ppb
2016-06-01DBP 2004410576.20 ppb
2016-06-01DBP 20044105814.5 ppb
2016-06-02DBP 2004412626.40 ppb
2016-06-02DBP 20044129717.9 ppb
2016-06-02DBP 20044129819.9 ppb
2016-06-02DBP 20044129915.3 ppb
2016-09-06DBP 20044896918.4 ppb
2016-09-06DBP 20044897415.2 ppb
2016-09-06DBP 20044900122.2 ppb
2016-09-06DBP 20044901417.3 ppb
2016-09-06DBP 20044901521.7 ppb
2016-09-06DBP 20044901628.7 ppb
2016-09-07DBP 20044921420.6 ppb
2016-09-08DBP 20044940724.9 ppb
2016-09-08DBP 20044940821.4 ppb
2016-09-09DBP 20044950020.8 ppb
2016-09-12DBP 2004495459.20 ppb
2016-09-12DBP 2004495472.00 ppb
2016-12-05DBP 2004560818.80 ppb
2016-12-05DBP 20045608315.3 ppb
2016-12-06DBP 20045608813.8 ppb
2016-12-06DBP 20045611011.9 ppb
2016-12-06DBP 20045611511.6 ppb
2016-12-06DBP 20045617515.5 ppb
2016-12-07DBP 2004563581.90 ppb
2016-12-07DBP 20045635914.7 ppb
2016-12-08DBP 200456453ND
2016-12-08DBP 20045646016.3 ppb
2016-12-08DBP 20045646112.8 ppb
2016-12-08DBP 2004564628.70 ppb
2017-03-01DBP 20046149615.0 ppb
2017-03-01DBP 20046154215.0 ppb
2017-03-01DBP 20046154318.4 ppb
2017-03-01DBP 20046154414.3 ppb
2017-03-01DBP 20046154518.8 ppb
2017-03-01DBP 20046154613.9 ppb
2017-03-02DBP 20046165014.0 ppb
2017-03-02DBP 20046165115.6 ppb
2017-03-02DBP 20046167321.3 ppb
2017-03-02DBP 20046167418.6 ppb
2017-03-02DBP 2004616756.10 ppb
2017-03-03DBP 2004617274.70 ppb
2017-06-05DBP 20046842011.1 ppb
2017-06-05DBP 20046842117.6 ppb
2017-06-06DBP 20046847612.7 ppb
2017-06-06DBP 20046848112.5 ppb
2017-06-06DBP 20046850016.9 ppb
2017-06-07DBP 20046866911.3 ppb
2017-06-07DBP 20046867016.2 ppb
2017-06-08DBP 2004688507.50 ppb
2017-06-08DBP 20046894617.0 ppb
2017-06-08DBP 20046894718.6 ppb
2017-06-08DBP 20046894813.7 ppb
2017-06-08DBP 20046894913.0 ppb
2017-09-05DBP 20047578517.7 ppb
2017-09-05DBP 20047579014.2 ppb
2017-09-05DBP 20047580022.1 ppb
2017-09-07DBP 2004761042.90 ppb
2017-09-07DBP 20047622024.7 ppb
2017-09-07DBP 20047622118.6 ppb
2017-09-07DBP 20047622221.8 ppb
2017-09-07DBP 20047622419.0 ppb
2017-09-08DBP 20047630214.4 ppb
2017-09-08DBP 20047630410.4 ppb
2017-09-08DBP 20047630513.9 ppb
2017-09-08DBP 2004763060.700 ppb
2017-12-05DBP 20048337613.5 ppb
2017-12-05DBP 20048338113.1 ppb
2017-12-05DBP 20048339118.3 ppb
2017-12-07DBP 20048377014.0 ppb
2017-12-07DBP 20048377113.4 ppb
2017-12-07DBP 20048377214.5 ppb
2017-12-07DBP 2004837734.30 ppb
2017-12-07DBP 20048377422.2 ppb
2017-12-08DBP 2004838347.20 ppb
2017-12-08DBP 20048384311.0 ppb
2017-12-08DBP 20048384416.6 ppb
2017-12-08DBP 20048384515.6 ppb
2018-03-06DBP 20048926819.2 ppb
2018-03-06DBP 20048927522.4 ppb
2018-03-06DBP 20048928721.2 ppb
2018-03-07DBP 20048953712.8 ppb
2018-03-07DBP 20048953822.4 ppb
2018-03-07DBP 20048953924.4 ppb
2018-03-07DBP 20048954022.2 ppb
2018-03-07DBP 20048954119.2 ppb
2018-03-08DBP 2004895658.80 ppb
2018-03-09DBP 20048970123.7 ppb
2018-03-09DBP 20048970225.9 ppb
2018-03-09DBP 20048970316.0 ppb
2018-06-05DBP 20049598414.7 ppb
2018-06-05DBP 20049598916.2 ppb
2018-06-05DBP 20049600217.8 ppb
2018-06-06DBP 20049623516.2 ppb
2018-06-07DBP 20049637515.0 ppb
2018-06-07DBP 20049637618.7 ppb
2018-06-07DBP 20049641713.6 ppb
2018-06-08DBP 20049650718.2 ppb
2018-06-08DBP 20049650817.1 ppb
2018-06-08DBP 20049650920.2 ppb
2018-06-08DBP 20049651021.8 ppb
2018-06-08DBP 20049651117.8 ppb
2018-09-04DBP 20050373215.3 ppb
2018-09-04DBP 2005037375.80 ppb
2018-09-04DBP 20050384211.2 ppb
2018-09-04DBP 20050391210.4 ppb
2018-09-04DBP 20050391310.9 ppb
2018-09-04DBP 20050391415.8 ppb
2018-09-05DBP 20050398116.7 ppb
2018-09-05DBP 20050408614.1 ppb
2018-09-05DBP 2005040874.50 ppb
2018-09-06DBP 2005041853.40 ppb
2018-09-06DBP 2005042115.30 ppb
2018-09-07DBP 20050444116.1 ppb
2018-12-03DBP 2005143725.40 ppb
2018-12-03DBP 20051440615.6 ppb
2018-12-04DBP 20051444715.0 ppb
2018-12-04DBP 20051445217.4 ppb
2018-12-04DBP 20051462518.3 ppb
2018-12-04DBP 20051462618.9 ppb
2018-12-04DBP 20051462714.9 ppb
2018-12-04DBP 20051462813.5 ppb
2018-12-04DBP 20051462913.9 ppb
2018-12-05DBP 20051495216.2 ppb
2018-12-06DBP 20051506914.2 ppb
2018-12-06DBP 20051507020.0 ppb
2019-03-04DBP 2005232157.20 ppb
2019-03-04DBP 2005232179.70 ppb
2019-03-05DBP 2005232629.00 ppb
2019-03-05DBP 2005232699.80 ppb
2019-03-05DBP 20052345610.6 ppb
2019-03-05DBP 20052345715.5 ppb
2019-03-05DBP 20052345810.4 ppb
2019-03-05DBP 2005234599.90 ppb
2019-03-05DBP 2005234636.60 ppb
2019-03-07DBP 20052388410.1 ppb
2019-03-08DBP 2005240008.30 ppb
2019-03-08DBP 20052400212.2 ppb
2019-06-03DBP 20053437311.7 ppb
2019-06-03DBP 20053441410.5 ppb
2019-06-04DBP 20053449110.00 ppb
2019-06-04DBP 20053449610.5 ppb
2019-06-04DBP 20053460011.2 ppb
2019-06-04DBP 20053472512.2 ppb
2019-06-04DBP 20053472712.9 ppb
2019-06-04DBP 20053472915.6 ppb
2019-06-05DBP 20053503914.1 ppb
2019-06-05DBP 20053504110.9 ppb
2019-06-06DBP 20053519711.1 ppb
2019-06-07DBP 20053535710.3 ppb
2019-09-03DBP 20054698811.9 ppb
2019-09-03DBP 2005469932.60 ppb
2019-09-04DBP 2005474008.00 ppb
2019-09-04DBP 2005474029.10 ppb
2019-09-04DBP 20054740313.2 ppb
2019-09-04DBP 20054740412.6 ppb
2019-09-04DBP 20054740511.9 ppb
2019-09-05DBP 20054746010.1 ppb
2019-09-05DBP 2005476677.70 ppb
2019-09-06DBP 20054782611.9 ppb
2019-09-06DBP 20054782710.1 ppb
2019-09-06DBP 20054782813.6 ppb
2019-12-02DBP 20055840515.3 ppb
2019-12-02DBP 20055840611.5 ppb
2019-12-02DBP 20055840712.6 ppb
2019-12-03DBP 20055845410.2 ppb
2019-12-03DBP 20055845911.7 ppb
2019-12-03DBP 20055861211.2 ppb
2019-12-04DBP 2005589169.70 ppb
2019-12-04DBP 20055891710.3 ppb
2019-12-04DBP 2005589197.60 ppb
2019-12-05DBP 20055907311.2 ppb
2019-12-05DBP 2005590989.10 ppb
2019-12-06DBP 20055919510.4 ppb