Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dichloroacetic acid

Desert Water Agency

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

 

176

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.000 ppb323ND - 15.4 ppb
20150.419 ppb323ND - 8.80 ppb
20160.619 ppb323ND - 13.7 ppb
20170.241 ppb323ND - 3.90 ppb
20180.300 ppb161ND - 4.80 ppb
20190.500 ppb321ND - 16.0 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
2014-03-123761-801-0900ND
2014-03-123761-802-0940ND
2014-03-123761-803-100514.0 ppb
2014-03-123761-804-1035ND
2014-03-123761-805-1110ND
2014-03-123761-806-1140ND
2014-03-123761-807-1215ND
2014-03-123761-808-0800ND
2014-06-113761-801-0915ND
2014-06-113761-802-0945ND
2014-06-113761-803-101515.4 ppb
2014-06-113761-804-1045ND
2014-06-113761-805-1145ND
2014-06-113761-806-1245ND
2014-06-113761-807-1215ND
2014-06-113761-808-1115ND
2014-09-103761-801-0930ND
2014-09-103761-802-1015ND
2014-09-103761-803-1045ND
2014-09-103761-804-1145ND
2014-09-103761-805-1215ND
2014-09-103761-806-1315ND
2014-09-103761-807-1245ND
2014-09-103761-808-1115ND
2014-12-103761-801-0745ND
2014-12-103761-802-0845ND
2014-12-103761-803-09102.60 ppb
2014-12-103761-804-1010ND
2014-12-103761-805-1035ND
2014-12-103761-806-1145ND
2014-12-103761-807-1115ND
2014-12-103761-808-0940ND
2015-03-113761-801-0920ND
2015-03-113761-802-09501.50 ppb
2015-03-113761-803-10158.80 ppb
2015-03-113761-804-1110ND
2015-03-113761-805-1135ND
2015-03-113761-806-1230ND
2015-03-113761-807-1200ND
2015-03-113761-808-1045ND
2015-06-103761-801-0925ND
2015-06-103761-802-1010ND
2015-06-103761-803-1030ND
2015-06-103761-804-1100ND
2015-06-103761-805-1125ND
2015-06-103761-806-1150ND
2015-06-103761-807-1220ND
2015-06-103761-808-1255ND
2015-09-083761-801-0930ND
2015-09-083761-802-1015ND
2015-09-083761-803-1045ND
2015-09-083761-804-1115ND
2015-09-083761-805-1330ND
2015-09-083761-806-1550ND
2015-09-083761-807-1500ND
2015-09-083761-808-1415ND
2015-12-093761-801-1110ND
2015-12-093761-802-09403.10 ppb
2015-12-093761-803-1020ND
2015-12-093761-804-0815ND
2015-12-093761-805-1020ND
2015-12-093761-806-0740ND
2015-12-093761-807-0925ND
2015-12-093761-808-0900ND
2016-03-073761-801-1240ND
2016-03-073761-805-1000ND
2016-03-073761-807-0930ND
2016-03-093761-802-1100ND
2016-03-093761-803-11353.50 ppb
2016-03-093761-804-0940ND
2016-03-093761-806-0910ND
2016-03-093761-808-1015ND
2016-06-073761-801-1430ND
2016-06-073761-804-1145ND
2016-06-073761-805-1040ND
2016-06-073761-806-1005ND
2016-06-073761-807-0925ND
2016-06-083761-802-11002.60 ppb
2016-06-083761-803-1145ND
2016-06-083761-808-1215ND
2016-09-143761-801-0915ND
2016-09-143761-802-0950ND
2016-09-143761-803-1015ND
2016-09-143761-804-1105ND
2016-09-143761-805-1130ND
2016-09-143761-806-1145ND
2016-09-143761-807-1210ND
2016-09-143761-808-1045ND
2016-12-073761-801-1330ND
2016-12-073761-802-1430ND
2016-12-073761-803-150013.7 ppb
2016-12-083761-804-0930ND
2016-12-083761-805-1000ND
2016-12-083761-806-1025ND
2016-12-083761-807-1115ND
2016-12-083761-808-0900ND
2017-03-093761-801-0950ND
2017-03-093761-802-1100ND
2017-03-093761-803-1130ND
2017-03-093761-804-1245ND
2017-03-093761-805-1345ND
2017-03-093761-806-1425ND
2017-03-093761-807-1500ND
2017-03-093761-808-1315ND
2017-06-123761-801-1345ND
2017-06-123761-805-1430ND
2017-06-123761-807-1105ND
2017-06-133761-804-0955ND
2017-06-133761-806-1035ND
2017-06-143761-802-09553.90 ppb
2017-06-143761-803-10352.10 ppb
2017-06-143761-808-1120ND
2017-09-133761-801-0920ND
2017-09-133761-802-09551.70 ppb
2017-09-133761-803-1030ND
2017-09-133761-804-1130ND
2017-09-133761-805-1200ND
2017-09-133761-806-1315ND
2017-09-133761-807-1235ND
2017-09-133761-808-1100ND
2017-12-153761-801-0845ND
2017-12-153761-802-0910ND
2017-12-153761-803-0935ND
2017-12-153761-804-1020ND
2017-12-153761-805-1040ND
2017-12-153761-806-1100ND
2017-12-153761-807-1130ND
2017-12-153761-808-1000ND
2018-06-123761-801-0947ND
2018-06-123761-802-1042ND
2018-06-123761-803-1148ND
2018-06-123761-808-1224ND
2018-06-133761-804-0900ND
2018-06-133761-805-0935ND
2018-06-133761-806-1014ND
2018-06-133761-807-1049ND
2018-12-124790-801-0745ND
2018-12-124790-802-0815ND
2018-12-124790-803-08454.80 ppb
2018-12-124790-804-0945ND
2018-12-124790-805-1015ND
2018-12-124790-806-1140ND
2018-12-124790-807-1100ND
2018-12-124790-808-0915ND
2019-03-074790-801-0805ND
2019-03-074790-802-0830ND
2019-03-074790-803-0740ND
2019-03-074790-804-0930ND
2019-03-074790-805-1000ND
2019-03-074790-806-0955ND
2019-03-074790-807-1100ND
2019-03-074790-808-0900ND
2019-06-274790-801-0855ND
2019-06-274790-802-092516.0 ppb
2019-06-274790-803-1000ND
2019-06-274790-804-1055ND
2019-06-274790-805-1125ND
2019-06-274790-806-1145ND
2019-06-274790-807-1215ND
2019-06-274790-808-1025ND
2019-09-124790-801-1415ND
2019-09-124790-802-1330ND
2019-09-124790-803-1300ND
2019-09-124790-804-1100ND
2019-09-124790-805-1020ND
2019-09-124790-806-0930ND
2019-09-124790-807-0830ND
2019-09-124790-808-1210ND
2019-12-124790-801-0830ND
2019-12-124790-802-0945ND
2019-12-124790-803-1010ND
2019-12-124790-804-1125ND
2019-12-124790-805-1150ND
2019-12-124790-806-1345ND
2019-12-124790-807-1300ND
2019-12-124790-808-1045ND