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EWG's Tap Water Database — 2021 UPDATE

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Dibromoacetic acid

Walnut Creek SUD

Dibromoacetic 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)

72

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20145.13 ppb16163.00 ppb - 7.40 ppb
20150.188 ppb161ND - 3.00 ppb
20160.913 ppb167ND - 2.60 ppb
20174.37 ppb16161.000 ppb - 7.50 ppb
20186.88 ppb16161.20 ppb - 9.10 ppb
20195.41 ppb16164.00 ppb - 6.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-26Q14063680043.20 ppb
2014-02-26Q14063680033.30 ppb
2014-02-26Q14063680023.30 ppb
2014-02-26Q14063680013.00 ppb
2014-05-29Q14184040046.10 ppb
2014-05-29Q14184040036.70 ppb
2014-05-29Q14184040027.40 ppb
2014-05-29Q14184040016.80 ppb
2014-09-03Q14411340046.80 ppb
2014-09-03Q14411340036.20 ppb
2014-09-03Q14411340056.70 ppb
2014-09-03Q14411340065.90 ppb
2014-12-01Q14577460043.80 ppb
2014-12-01Q14577460034.10 ppb
2014-12-01Q14577460024.90 ppb
2014-12-01Q14577460013.90 ppb
2015-03-03Q1507940006ND
2015-03-03Q1507940005ND
2015-03-03Q15079400043.00 ppb
2015-03-03Q1507940003ND
2015-06-02Q1520361001ND
2015-06-02Q1520361002ND
2015-06-02Q1520361004ND
2015-06-02Q1520361003ND
2015-09-15Q1535843006ND
2015-09-15Q1535843005ND
2015-09-15Q1535843004ND
2015-09-15Q1535843003ND
2015-12-14Q1549778004ND
2015-12-14Q1549778003ND
2015-12-14Q1549778002ND
2015-12-14Q1549778001ND
2016-02-29Q1608183010ND
2016-02-29Q1608183009ND
2016-02-29Q1608183011ND
2016-02-29Q1608183012ND
2016-05-31Q1621276004ND
2016-05-31Q1621276003ND
2016-05-31Q1621276002ND
2016-05-31Q1621276001ND
2016-09-26Q16400290061.80 ppb
2016-09-26Q16400290052.60 ppb
2016-09-26Q16400290042.60 ppb
2016-09-26Q1640029003ND
2016-12-14Q16545690011.80 ppb
2016-12-14Q16545690041.50 ppb
2016-12-14Q16545690021.90 ppb
2016-12-14Q16545690032.40 ppb
2017-02-13Q17060850041.000 ppb
2017-02-13Q17060850061.40 ppb
2017-02-13Q17060850031.70 ppb
2017-02-13Q17060850021.20 ppb
2017-05-22Q17208560042.00 ppb
2017-05-22Q17208560032.60 ppb
2017-05-22Q17208560022.50 ppb
2017-05-22Q17208560012.20 ppb
2017-08-28Q17387590046.70 ppb
2017-08-28Q17387590067.30 ppb
2017-08-28Q17387590016.90 ppb
2017-08-28Q17387590056.20 ppb
2017-11-07Q17569500026.30 ppb
2017-11-07Q17569500047.30 ppb
2017-11-07Q17569500017.50 ppb
2017-11-07Q17569500037.10 ppb
2018-02-15Q18066650081.20 ppb
2018-02-15Q18066650076.60 ppb
2018-02-15Q18066650066.30 ppb
2018-02-15Q18066650055.70 ppb
2018-04-23Q18163860027.10 ppb
2018-04-23Q18163860037.00 ppb
2018-04-23Q18163860016.80 ppb
2018-05-02Q18177560016.00 ppb
2018-07-23Q18290230047.00 ppb
2018-07-23Q18290230068.20 ppb
2018-07-23Q18290230037.60 ppb
2018-07-23Q18290230057.40 ppb
2018-10-16Q18410600047.20 ppb
2018-10-16Q18410600038.70 ppb
2018-10-16Q18410600029.10 ppb
2018-10-16Q18410600018.10 ppb
2019-01-22Q19030730074.40 ppb
2019-01-22Q19030730085.00 ppb
2019-01-22Q19030730094.50 ppb
2019-01-22Q19030730104.30 ppb
2019-04-23Q19162480025.40 ppb
2019-04-23Q19162480044.00 ppb
2019-04-23Q19162480015.70 ppb
2019-04-23Q19162480035.70 ppb
2019-08-22Q19584730065.50 ppb
2019-08-22Q19584730055.60 ppb
2019-08-22Q19584730046.50 ppb
2019-08-22Q19584730035.50 ppb
2019-11-18Q19771200016.40 ppb
2019-11-18Q19771200045.10 ppb
2019-11-18Q19771200036.30 ppb
2019-11-18Q19771200026.60 ppb