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EWG's Tap Water Database — 2019 UPDATE

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Monobromoacetic acid

Contra Costa Water District

Monobromoacetic 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND40ND
2014ND40ND
2015ND20ND
20160.867 ppb31ND - 2.60 ppb
2017ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 25 ppb

The EWG Health Guideline of 25 ppb for monobromoacetic 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.. This health guideline protects against muscular degeneration.

ppb = parts per billion

All test results

Date Lab ID Result
2012-09-049590-003-0745ND
2013-03-209590-003-1255ND
2013-06-049590-003-1345ND
2013-09-039590-003-0910ND
2013-12-039590-003-0805ND
2014-03-109590-003-1119ND
2014-06-039590-003-1445ND
2014-09-029590-003-1500ND
2014-12-029590-003-1345ND
2015-06-029590-003-0815ND
2015-12-019590-003-1515ND
2016-06-079590-003-0851ND
2016-09-069590-003-08232.60 ppb
2016-12-069590-003-0915ND
2017-06-069590-003-1315ND
2017-09-129590-003-1420ND