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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Orange Water & Sewer 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

 

192

Samples

0

Samples exceeding legal limit (MCL)

192

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201413.3 ppb32328.50 ppb - 18.0 ppb
20158.70 ppb32324.60 ppb - 15.0 ppb
20169.22 ppb32324.80 ppb - 14.0 ppb
20178.79 ppb32324.20 ppb - 15.0 ppb
20187.56 ppb32322.90 ppb - 12.0 ppb
20196.54 ppb32323.30 ppb - 11.0 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
2014-02-11297136516.0 ppb
2014-02-11297136616.0 ppb
2014-02-11297136716.0 ppb
2014-02-11297136818.0 ppb
2014-02-11297136917.0 ppb
2014-02-11297137017.0 ppb
2014-02-11297137116.0 ppb
2014-02-11297137214.0 ppb
2014-05-13302528311.0 ppb
2014-05-13302528413.0 ppb
2014-05-13302528511.0 ppb
2014-05-13302528610.00 ppb
2014-05-13302528711.0 ppb
2014-05-13302528811.0 ppb
2014-05-13302528912.0 ppb
2014-05-13302529010.00 ppb
2014-08-12308166015.0 ppb
2014-08-12308166117.0 ppb
2014-08-12308166212.0 ppb
2014-08-12308166317.0 ppb
2014-08-12308166416.0 ppb
2014-08-12308166514.0 ppb
2014-08-12308166616.0 ppb
2014-08-12308166713.0 ppb
2014-11-12313806410.00 ppb
2014-11-12313806511.0 ppb
2014-11-12313806611.0 ppb
2014-11-12313806712.0 ppb
2014-11-12313806812.0 ppb
2014-11-12313806911.0 ppb
2014-11-12313807011.0 ppb
2014-11-1231380718.50 ppb
2015-02-105.40 ppb
2015-02-105.50 ppb
2015-02-104.60 ppb
2015-02-106.10 ppb
2015-02-105.70 ppb
2015-02-105.20 ppb
2015-02-105.80 ppb
2015-02-104.80 ppb
2015-05-1212.0 ppb
2015-05-1214.0 ppb
2015-05-1211.0 ppb
2015-05-126.00 ppb
2015-05-1214.0 ppb
2015-05-1213.0 ppb
2015-05-1212.0 ppb
2015-05-1210.00 ppb
2015-08-1112.0 ppb
2015-08-1115.0 ppb
2015-08-119.30 ppb
2015-08-1113.0 ppb
2015-08-1112.0 ppb
2015-08-1111.0 ppb
2015-08-1113.0 ppb
2015-08-118.00 ppb
2015-11-106.10 ppb
2015-11-106.20 ppb
2015-11-105.40 ppb
2015-11-106.80 ppb
2015-11-106.80 ppb
2015-11-106.10 ppb
2015-11-106.50 ppb
2015-11-106.00 ppb
2016-02-1634017066.00 ppb
2016-02-1634017076.70 ppb
2016-02-1634017086.20 ppb
2016-02-1634017096.90 ppb
2016-02-1634017106.10 ppb
2016-02-1634017115.80 ppb
2016-02-1634017125.70 ppb
2016-02-1634017134.80 ppb
2016-05-10344620510.00 ppb
2016-05-1034462068.00 ppb
2016-05-10344620811.0 ppb
2016-05-10344620912.0 ppb
2016-05-1034462108.70 ppb
2016-05-10344621111.0 ppb
2016-05-1034462129.00 ppb
2016-05-1234478439.00 ppb
2016-08-16352407813.0 ppb
2016-08-16352407914.0 ppb
2016-08-16352408013.0 ppb
2016-08-16352408113.0 ppb
2016-08-16352408212.0 ppb
2016-08-16352408312.0 ppb
2016-08-16352408413.0 ppb
2016-08-16352408512.0 ppb
2016-11-1535872187.80 ppb
2016-11-1535872198.70 ppb
2016-11-1535872207.00 ppb
2016-11-15358722111.0 ppb
2016-11-1535872228.30 ppb
2016-11-1535872238.50 ppb
2016-11-1535872248.80 ppb
2016-11-1535872256.10 ppb
2017-02-2136423894.60 ppb
2017-02-2136423904.80 ppb
2017-02-2136423914.30 ppb
2017-02-2136423925.90 ppb
2017-02-2136423935.50 ppb
2017-02-2136423944.60 ppb
2017-02-2136423955.10 ppb
2017-02-2136423965.20 ppb
2017-05-1636956559.00 ppb
2017-05-16369565611.0 ppb
2017-05-1636956578.90 ppb
2017-05-1636956589.90 ppb
2017-05-16369565911.0 ppb
2017-05-16369566011.0 ppb
2017-05-16369566111.0 ppb
2017-05-1636956628.20 ppb
2017-08-15375786114.0 ppb
2017-08-15375786215.0 ppb
2017-08-15375786313.0 ppb
2017-08-15375786414.0 ppb
2017-08-15375786515.0 ppb
2017-08-15375786612.0 ppb
2017-08-15375786714.0 ppb
2017-08-15375786812.0 ppb
2017-11-1438207976.30 ppb
2017-11-1438207987.30 ppb
2017-11-1438207994.70 ppb
2017-11-1438208008.70 ppb
2017-11-1438208017.20 ppb
2017-11-1438208027.00 ppb
2017-11-1438208037.00 ppb
2017-11-1438208044.20 ppb
2018-02-133871505 4.10 ppb
2018-02-133871506 3.70 ppb
2018-02-133871507 3.90 ppb
2018-02-133871508 3.70 ppb
2018-02-133871509 3.70 ppb
2018-02-133871510 3.30 ppb
2018-02-133871511 3.50 ppb
2018-02-133871512 2.90 ppb
2018-05-153937750 8.30 ppb
2018-05-153937751 7.90 ppb
2018-05-153937752 5.50 ppb
2018-05-153937753 8.70 ppb
2018-05-153937754 6.20 ppb
2018-05-153937755 6.90 ppb
2018-05-153937756 6.00 ppb
2018-05-153937757 6.80 ppb
2018-08-144022645 9.80 ppb
2018-08-144022646 10.00 ppb
2018-08-144022647 8.90 ppb
2018-08-144022648 10.00 ppb
2018-08-144022649 10.00 ppb
2018-08-144022650 8.80 ppb
2018-08-144022651 9.40 ppb
2018-08-144022652 10.00 ppb
2018-11-134121608 11.0 ppb
2018-11-134121609 11.0 ppb
2018-11-134121610 7.80 ppb
2018-11-134121611 12.0 ppb
2018-11-134121612 11.0 ppb
2018-11-134121613 11.0 ppb
2018-11-134121614 9.50 ppb
2018-11-134121615 6.70 ppb
2019-02-124195878-1 4.30 ppb
2019-02-124195879-1 4.10 ppb
2019-02-124195880-1 3.40 ppb
2019-02-124195881-1 4.80 ppb
2019-02-124195882-1 4.70 ppb
2019-02-124195883-1 4.20 ppb
2019-02-124195884-1 4.20 ppb
2019-02-124195885-1 3.80 ppb
2019-05-144294466 10.00 ppb
2019-05-144294467 9.80 ppb
2019-05-144294468 7.60 ppb
2019-05-144294469 11.0 ppb
2019-05-144294470 10.00 ppb
2019-05-144294471 9.90 ppb
2019-05-144294472 10.00 ppb
2019-05-144294473 8.10 ppb
2019-08-134386079 7.60 ppb
2019-08-134386080 7.50 ppb
2019-08-134386081 7.50 ppb
2019-08-134386082 7.00 ppb
2019-08-134386083 8.30 ppb
2019-08-134386084 7.70 ppb
2019-08-134386085 7.20 ppb
2019-08-134386086 5.80 ppb
2019-11-114482182 5.00 ppb
2019-11-114482183 5.10 ppb
2019-11-114482184 5.10 ppb
2019-11-114482185 6.40 ppb
2019-11-114482186 5.60 ppb
2019-11-114482187 5.10 ppb
2019-11-114482188 5.20 ppb
2019-11-114482189 3.30 ppb