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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Highway 117 Water Supply Corporation

NOTE: Highway 117 Water Supply Corporation purchases water from City of Uvalde which is required to test for dichloroacetic acid. Sample information shown below was taken by City of Uvalde.

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)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND10ND
2017ND160ND
2018ND160ND
2019ND10ND

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

NOTE: Highway 117 Water Supply Corporation purchases water from City of Uvalde which is required to test for dichloroacetic acid. Sample information shown below was taken by City of Uvalde.

Date Lab ID Result
2014-03-04AC45585ND
2014-03-04AC45582ND
2014-03-04AC45584ND
2014-03-04AC45583ND
2014-04-28AC51863ND
2014-04-28AC51842ND
2014-04-28AC51841ND
2014-04-28AC51845ND
2014-08-13AC63551ND
2014-08-13AC63549ND
2014-08-13AC63550ND
2014-08-13AC63572ND
2014-12-11AC74650ND
2014-12-11AC74644ND
2014-12-11AC74646ND
2014-12-11AC74639ND
2015-01-26AC77770ND
2015-01-26AC77738ND
2015-01-26AC77752ND
2015-01-26AC77739ND
2015-04-29AC89843ND
2015-04-29AC89844ND
2015-04-29AC89846ND
2015-04-29AC89845ND
2015-07-27AD01007ND
2015-07-27AD01010ND
2015-07-27AD01004ND
2015-07-27AD01008ND
2015-10-05AD09375ND
2015-10-05AD09373ND
2015-10-05AD09379ND
2015-10-05AD09374ND
2016-01-20AD18903ND
2016-01-20AD18902ND
2016-01-20AD18904ND
2016-01-20AD18901ND
2016-05-02AD34810ND
2016-05-02AD34804ND
2016-05-02AD34811ND
2016-05-02AD34814ND
2016-09-06AD48019ND
2016-09-06AD48018ND
2016-09-06AD48013ND
2016-09-06AD48017ND
2016-10-18AD53521ND
2016-10-18AD53524ND
2016-10-18AD53523ND
2016-10-18AD53522ND
2017-01-23AD66017ND
2017-01-23AD66018ND
2017-01-23AD66052ND
2017-01-23AD66016ND
2017-04-10AD78926ND
2017-04-10AD78923ND
2017-04-10AD78924ND
2017-04-10AD78925ND
2017-08-17AD93372ND
2017-08-17AD93380ND
2017-08-17AD93382ND
2017-08-17AD93383ND
2017-10-24AE01804ND
2017-10-24AE01803ND
2017-10-24AE01786ND
2017-10-24AE01805ND
2018-01-25AE10495ND
2018-01-25AE10502ND
2018-01-25AE10528ND
2018-01-25AE10501ND
2018-04-12AE22260ND
2018-04-12AE22258ND
2018-04-12AE22259ND
2018-04-12AE22257ND
2018-08-09AE36312ND
2018-08-09AE36313ND
2018-08-09AE36310ND
2018-08-09AE36309ND
2018-11-15AE46211ND
2018-11-15AE46210ND
2018-11-15AE46212ND
2018-11-15AE46213ND
2019-01-31AE52433ND
2019-01-31AE52435ND
2019-01-31AE52436ND
2019-01-31AE52434ND
2019-05-01AE64310ND
2019-05-01AE64307ND
2019-05-01AE64308ND
2019-05-01AE64315ND
2019-08-27AE81008ND
2019-08-27AE81009ND
2019-08-27AE81006ND
2019-08-27AE81010ND
2019-10-22AE87214ND
2019-10-22AE87213ND
2019-10-22AE87216ND
2019-10-22AE87212ND