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EWG's Tap Water Database — 2019 UPDATE

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Bromate

Massachusetts Water Resources Authority (MWRA)

Bromate is a carcinogenic disinfection byproduct formed when source waters containing bromide are treated with ozonation or sodium hypochlorite. Studies of laboratory animals show that bromate damages DNA and causes cancer in multiple organs. Click here to read more about disinfection byproducts.

 

426

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND720ND
2013ND720ND
2014ND720ND
2015ND720ND
2016ND660ND
2017ND720ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for bromate was defined 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 cancer.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The legal limit for bromate, established in 1998, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to bromate exposure.

ppb = parts per billion

All test results

Date Result
2012-01-09ND
2012-01-09ND
2012-01-09ND
2012-01-09ND
2012-01-09ND
2012-01-09ND
2012-02-06ND
2012-02-06ND
2012-02-06ND
2012-02-06ND
2012-02-06ND
2012-02-06ND
2012-03-05ND
2012-03-05ND
2012-03-05ND
2012-03-05ND
2012-03-05ND
2012-03-05ND
2012-04-02ND
2012-04-02ND
2012-04-02ND
2012-04-02ND
2012-04-02ND
2012-04-02ND
2012-05-07ND
2012-05-07ND
2012-05-07ND
2012-05-07ND
2012-05-07ND
2012-05-07ND
2012-06-04ND
2012-06-04ND
2012-06-04ND
2012-06-04ND
2012-06-04ND
2012-06-04ND
2012-07-09ND
2012-07-09ND
2012-07-09ND
2012-07-09ND
2012-07-09ND
2012-07-09ND
2012-08-06ND
2012-08-06ND
2012-08-06ND
2012-08-06ND
2012-08-06ND
2012-08-06ND
2012-09-10ND
2012-09-10ND
2012-09-10ND
2012-09-10ND
2012-09-10ND
2012-09-10ND
2012-10-01ND
2012-10-01ND
2012-10-01ND
2012-10-01ND
2012-10-01ND
2012-10-01ND
2012-11-05ND
2012-11-05ND
2012-11-05ND
2012-11-05ND
2012-11-05ND
2012-11-05ND
2012-12-03ND
2012-12-03ND
2012-12-03ND
2012-12-03ND
2012-12-03ND
2012-12-03ND
2013-01-07ND
2013-01-07ND
2013-01-07ND
2013-01-07ND
2013-01-07ND
2013-01-07ND
2013-02-04ND
2013-02-04ND
2013-02-04ND
2013-02-04ND
2013-02-04ND
2013-02-04ND
2013-03-04ND
2013-03-04ND
2013-03-04ND
2013-03-04ND
2013-03-04ND
2013-03-04ND
2013-04-01ND
2013-04-01ND
2013-04-01ND
2013-04-01ND
2013-04-01ND
2013-04-01ND
2013-05-06ND
2013-05-06ND
2013-05-06ND
2013-05-06ND
2013-05-06ND
2013-05-06ND
2013-06-03ND
2013-06-03ND
2013-06-03ND
2013-06-03ND
2013-06-03ND
2013-06-03ND
2013-07-09ND
2013-07-09ND
2013-07-09ND
2013-07-09ND
2013-07-09ND
2013-07-09ND
2013-08-05ND
2013-08-05ND
2013-08-05ND
2013-08-05ND
2013-08-05ND
2013-08-05ND
2013-09-04ND
2013-09-04ND
2013-09-04ND
2013-09-04ND
2013-09-04ND
2013-09-04ND
2013-10-07ND
2013-10-07ND
2013-10-07ND
2013-10-07ND
2013-10-07ND
2013-10-07ND
2013-11-04ND
2013-11-04ND
2013-11-04ND
2013-11-04ND
2013-11-04ND
2013-11-04ND
2013-12-02ND
2013-12-02ND
2013-12-02ND
2013-12-02ND
2013-12-02ND
2013-12-02ND
2014-01-06ND
2014-01-06ND
2014-01-06ND
2014-01-06ND
2014-01-06ND
2014-01-06ND
2014-02-03ND
2014-02-03ND
2014-02-03ND
2014-02-03ND
2014-02-03ND
2014-02-03ND
2014-03-03ND
2014-03-03ND
2014-03-03ND
2014-03-03ND
2014-03-03ND
2014-03-03ND
2014-04-07ND
2014-04-07ND
2014-04-07ND
2014-04-07ND
2014-04-07ND
2014-04-07ND
2014-05-05ND
2014-05-05ND
2014-05-05ND
2014-05-05ND
2014-05-05ND
2014-05-05ND
2014-06-02ND
2014-06-02ND
2014-06-02ND
2014-06-03ND
2014-06-03ND
2014-06-03ND
2014-07-07ND
2014-07-07ND
2014-07-07ND
2014-07-07ND
2014-07-07ND
2014-07-07ND
2014-08-05ND
2014-08-05ND
2014-08-05ND
2014-08-05ND
2014-08-05ND
2014-08-05ND
2014-09-09ND
2014-09-09ND
2014-09-09ND
2014-09-09ND
2014-09-09ND
2014-09-09ND
2014-10-06ND
2014-10-06ND
2014-10-06ND
2014-10-06ND
2014-10-06ND
2014-10-06ND
2014-11-04ND
2014-11-04ND
2014-11-04ND
2014-11-04ND
2014-11-04ND
2014-11-04ND
2014-12-01ND
2014-12-01ND
2014-12-01ND
2014-12-01ND
2014-12-01ND
2014-12-01ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-02-02ND
2015-02-02ND
2015-02-02ND
2015-02-02ND
2015-02-02ND
2015-02-02ND
2015-03-02ND
2015-03-02ND
2015-03-02ND
2015-03-02ND
2015-03-02ND
2015-03-02ND
2015-04-06ND
2015-04-06ND
2015-04-06ND
2015-04-06ND
2015-04-06ND
2015-04-06ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-06-01ND
2015-06-01ND
2015-06-01ND
2015-06-01ND
2015-06-01ND
2015-06-01ND
2015-07-06ND
2015-07-06ND
2015-07-06ND
2015-07-06ND
2015-07-06ND
2015-07-06ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-09-08ND
2015-09-08ND
2015-09-08ND
2015-09-08ND
2015-09-08ND
2015-09-08ND
2015-10-05ND
2015-10-05ND
2015-10-05ND
2015-10-05ND
2015-10-05ND
2015-10-05ND
2015-11-02ND
2015-11-02ND
2015-11-02ND
2015-11-02ND
2015-11-02ND
2015-11-02ND
2015-12-07ND
2015-12-07ND
2015-12-07ND
2015-12-07ND
2015-12-07ND
2015-12-07ND
2016-01-04ND
2016-01-04ND
2016-01-04ND
2016-01-04ND
2016-01-04ND
2016-01-04ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-06-06ND
2016-06-06ND
2016-06-06ND
2016-06-06ND
2016-06-06ND
2016-06-06ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-08-01ND
2016-08-01ND
2016-08-01ND
2016-08-01ND
2016-08-01ND
2016-08-01ND
2016-09-06ND
2016-09-06ND
2016-09-06ND
2016-09-06ND
2016-09-06ND
2016-09-06ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-12-05ND
2016-12-05ND
2016-12-05ND
2016-12-05ND
2016-12-05ND
2016-12-05ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-02-06ND
2017-02-06ND
2017-02-06ND
2017-02-06ND
2017-02-06ND
2017-02-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-05-01ND
2017-05-01ND
2017-05-01ND
2017-05-01ND
2017-05-01ND
2017-05-01ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-09-05ND
2017-09-05ND
2017-09-05ND
2017-09-05ND
2017-09-05ND
2017-09-05ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-11-06ND
2017-11-06ND
2017-11-06ND
2017-11-06ND
2017-11-06ND
2017-11-06ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND
2017-12-04ND