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EWG's Tap Water Database — 2019 UPDATE

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Bromate

City of Santa Barbara Water Department

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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

51

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20131.40 ppb441.30 ppb - 1.50 ppb
20142.84 ppb1312ND - 8.40 ppb
20155.19 ppb1413ND - 9.50 ppb
20165.73 ppb11114.30 ppb - 8.40 ppb
20173.02 ppb11111.40 ppb - 5.40 ppb

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
2013-09-239590-054-10431.30 ppb
2013-10-309590-054-10431.40 ppb
2013-11-119590-054-08581.40 ppb
2013-12-189590-054-08331.50 ppb
2014-01-149590-054-09241.20 ppb
2014-02-199590-054-11202.20 ppb
2014-03-049590-054-11281.40 ppb
2014-04-089590-054-14202.30 ppb
2014-05-139590-054-12141.80 ppb
2014-06-039590-054-09152.00 ppb
2014-07-239590-054-14322.10 ppb
2014-08-199590-054-10012.40 ppb
2014-09-239590-054-09135.90 ppb
2014-10-149590-054-1211ND
2014-10-299590-054-11448.40 ppb
2014-11-119590-054-08293.90 ppb
2014-12-039590-054-09253.30 ppb
2015-01-219590-054-12072.50 ppb
2015-02-119590-054-1248ND
2015-02-249590-054-12013.70 ppb
2015-03-049590-054-09194.90 ppb
2015-04-149590-054-13156.60 ppb
2015-04-143774-054-13156.60 ppb
2015-05-139590-054-09537.10 ppb
2015-06-099590-054-08539.50 ppb
2015-07-229590-054-09594.50 ppb
2015-08-199590-054-11496.50 ppb
2015-09-099590-054-09536.10 ppb
2015-10-219590-054-10025.70 ppb
2015-11-109590-054-09304.20 ppb
2015-12-019590-054-08414.70 ppb
2016-01-129590-054-09104.30 ppb
2016-02-099590-054-10465.40 ppb
2016-03-099590-054-09154.60 ppb
2016-04-069590-054-08466.50 ppb
2016-05-109590-054-09174.60 ppb
2016-07-129590-054-08265.20 ppb
2016-08-109590-054-09157.00 ppb
2016-09-149590-054-10487.00 ppb
2016-10-129590-054-11208.40 ppb
2016-11-169590-054-09064.30 ppb
2016-12-289590-054-11055.70 ppb
2017-01-119590-054-10435.20 ppb
2017-02-089590-054-09385.40 ppb
2017-03-279590-054-10451.50 ppb
2017-04-059590-054-09561.40 ppb
2017-05-099590-054-09461.40 ppb
2017-07-199590-054-09453.00 ppb
2017-08-159590-054-09313.60 ppb
2017-09-069590-054-12422.20 ppb
2017-10-049590-054-11402.80 ppb
2017-11-079590-054-10163.00 ppb
2017-12-059590-054-10403.70 ppb