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EWG's Tap Water Database — 2021 UPDATE

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Bromate

Randall-bold Water Treatment Plant

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.

 

71

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.05 ppb112ND - 6.20 ppb
2015ND110ND
2016ND100ND
2017ND100ND
2018ND190ND
2019ND100ND

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 Lab ID Result
2014-01-219590-002-1200ND
2014-02-189590-002-1240ND
2014-03-049590-002-1225ND
2014-04-229590-002-1250ND
2014-05-209590-002-1106ND
2014-06-039590-002-1235ND
2014-07-229590-002-0952ND
2014-08-199590-002-10406.20 ppb
2014-09-029590-002-14355.30 ppb
2014-10-212473-002-1055ND
2014-12-092473-002-0925ND
2015-01-202473-002-1020ND
2015-02-172473-002-1327ND
2015-03-122473-002-0940ND
2015-04-212473-002-0917ND
2015-05-192473-002-1010ND
2015-06-022473-002-1414ND
2015-07-212473-002-1104ND
2015-08-182473-002-1125ND
2015-09-082473-002-1420ND
2015-10-132473-002-0900ND
2015-12-222473-002-0900ND
2016-02-162473-002-0900ND
2016-03-082473-002-0900ND
2016-05-172473-002-0900ND
2016-06-072473-002-0900ND
2016-07-192473-002-0900ND
2016-08-099590-002-0955ND
2016-09-139590-002-0945ND
2016-10-112473-002-0900ND
2016-11-082473-002-0900ND
2016-12-132473-002-0900ND
2017-01-172473-002-0945ND
2017-02-142473-002-0945ND
2017-03-072473-002-0945ND
2017-04-179590-002-1040ND
2017-04-172473-002-0945ND
2017-07-189590-002-0949ND
2017-09-129590-002-0950ND
2017-10-109590-002-1142ND
2017-11-149590-002-1405ND
2017-12-129590-002-1130ND
2018-01-01ND
2018-01-01ND
2018-02-01ND
2018-02-01ND
2018-03-01ND
2018-03-01ND
2018-04-01ND
2018-04-01ND
2018-05-01ND
2018-05-01ND
2018-06-01ND
2018-06-01ND
2018-07-01ND
2018-07-01ND
2018-08-01ND
2018-08-01ND
2018-09-111644-002-1235ND
2018-10-091644-002-0920ND
2018-12-061610-002-1005ND
2019-01-151644-002-1100ND
2019-02-121644-002-0923ND
2019-03-051644-002-0930ND
2019-05-141644-002-1032ND
2019-06-041644-002-0915ND
2019-07-091644-002-0945ND
2019-08-131644-002-0920ND
2019-09-101644-002-0854ND
2019-10-011644-002-0956ND
2019-12-191644-002-0825ND