Know Your Environment. Protect Your Health.

Bromate

Regional Water Authority

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.

 

69

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND120ND
2020ND120ND
2021ND130ND
2022ND150ND
2023ND120ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-08-17DBP 200502735ND
2018-09-04DBP 200503766ND
2018-10-01DBP 200507184ND
2018-11-05DBP 200511249ND
2018-12-03DBP 200514365ND
2019-01-02DBP 200517167ND
2019-02-04DBP 200520183ND
2019-03-04DBP 200523183ND
2019-04-01DBP 200526356ND
2019-05-02DBP 200530377ND
2019-06-03DBP 200534442ND
2019-07-01DBP 200538405ND
2019-08-08DBP 200543882ND
2019-09-04DBP 200547183ND
2019-10-01DBP 200550743ND
2019-11-29DBP 200558323ND
2019-12-16TOC 200560325ND
2020-01-06TOC 200561542ND
2020-02-03TOC 200564470ND
2020-03-02TOC 200567648ND
2020-04-07TOC 200571565ND
2020-05-05DBP 200574520ND
2020-06-02TOC 200577581ND
2020-07-07TOC 200581392ND
2020-08-04TOC 200584914ND
2020-09-01TOC 200588254ND
2020-10-06TOC 200592560ND
2020-11-03TOC 200596644ND
2020-12-01TOC 200599368ND
2021-01-05TOC 200602429ND
2021-02-02TOC 200605159ND
2021-03-02TOC 200608307ND
2021-04-06TOC 200611935ND
2021-05-04TOC 200615344ND
2021-06-01TOC 200618710ND
2021-07-07TOC 200623212ND
2021-10-18O300082886 300082887ND
2021-10-18O300082882 300082883ND
2021-11-01O300091732 300091733ND
2021-11-01O300091728 300091729ND
2021-12-01O300109971 300109972ND
2021-12-01O300109967 300109968ND
2022-01-06O300128605 300128606ND
2022-01-06O300128601 300128602ND
2022-02-02O300152370 300152373ND
2022-02-02O300152375 300152377ND
2022-03-01O300151283 300151284ND
2022-03-01O300151278 300151279ND
2022-04-04O300165197 300165201ND
2022-05-03O300177546 300177550ND
2022-06-01O300191291 300191295ND
2022-07-06O300207940 300207944ND
2022-08-03O300223826 300223830ND
2022-09-06O300238794 300238798ND
2022-10-03O300252720 300252724ND
2022-11-03O300266994 300266998ND
2022-12-05O300280229 300280233ND
2023-01-04O300292376 300292380ND
2023-02-01O300303452 300303456ND
2023-03-01O300314993 300314997ND
2023-04-03O300327029 300327033ND
2023-05-01O300341327 300341331ND
2023-06-01O300357010 300357014ND
2023-07-10O300378219 300378223ND
2023-08-01O300389633 300389637ND
2023-09-06O300410234 300410238ND
2023-10-03O300423857 300423861ND
2023-11-01O300438943 300438947ND
2023-12-06O300455289 300455293ND