Know Your Environment. Protect Your Health.

Bromate

Summit Mutual Water Company

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.

 

66

Samples

8

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.93 ppb104ND - 8.90 ppb
20190.509 ppb111ND - 5.60 ppb
2020ND100ND
20213.26 ppb134ND - 15.0 ppb
202213.9 ppb126ND - 44.0 ppb
20231.95 ppb103ND - 7.30 ppb

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
2018-01-16CA4400559_002_002-2018011614001.50 ppb
2018-02-07CA4400559_002_002-2018020711008.90 ppb
2018-03-07CA4400559_002_002-2018030710005.70 ppb
2018-04-10CA4400559_002_002-2018041015003.20 ppb
2018-05-09CA4400559_002_002-201805091200ND
2018-06-06CA4400559_002_002-201806061100ND
2018-07-11CA4400559_002_002-201807111000ND
2018-08-08CA4400559_002_002-201808081100ND
2018-11-14CA4400559_002_002-201811141200ND
2018-12-13CA4400559_002_002-201812131100ND
2019-01-16CA4400559_002_002-201901161806ND
2019-02-07CA4400559_002_002-201902071100ND
2019-03-11CA4400559_002_002-201903111545ND
2019-04-16CA4400559_002_002-201904161400ND
2019-05-21CA4400559_002_002-201905211540ND
2019-06-18CA4400559_002_002-201906180709ND
2019-07-10CA4400559_002_002-201907100730ND
2019-09-04CA4400559_002_002-2019090409005.60 ppb
2019-10-02CA4400559_002_002-201910020800ND
2019-11-05CA4400559_002_002-201911051710ND
2019-12-04CA4400559_002_002-201912040830ND
2020-01-07CA4400559_002_002-202001071715ND
2020-02-04CA4400559_002_002-202002041700ND
2020-03-03CA4400559_002_002-202003031700ND
2020-04-07CA4400559_002_002-202004070800ND
2020-05-06CA4400559_002_002-202005060700ND
2020-06-02CA4400559_002_002-202006020500ND
2020-07-07CA4400559_002_002-202007071700ND
2020-08-04CA4400559_002_002-202008041715ND
2020-10-07CA4400559_002_002-202010070700ND
2020-12-02CA4400559_002_002-202012020700ND
2021-01-05CA4400559_002_002-2021010517005.40 ppb
2021-02-03CA4400559_002_002-20210203080011.0 ppb
2021-03-03CA4400559_002_002-202103030930ND
2021-03-03CA4400559_002_002-202103030900ND
2021-04-05CA4400559_002_002-20210405160015.0 ppb
2021-05-05CA4400559_002_002-202105050830ND
2021-06-08CA4400559_002_002-20210608173011.0 ppb
2021-07-07CA4400559_002_002-202107071900ND
2021-08-03CA4400559_002_002-202108030900ND
2021-09-08CA4400559_002_002-202109080900ND
2021-10-06CA4400559_002_002-202110061000ND
2021-11-03CA4400559_002_002-202111031000ND
2021-12-08CA4400559_002_002-202112081200ND
2022-01-05CA4400559_002_002-202201051200ND
2022-02-01CA4400559_002_002-202202011200ND
2022-03-02CA4400559_002_002-202203021200ND
2022-04-13CA4400559_002_002-202204131200ND
2022-05-02CA4400559_002_002-202205021453ND
2022-06-02CA4400559_002_002-202206021200ND
2022-07-08CA4400559_002_002-20220708080041.0 ppb
2022-08-04CA4400559_002_002-20220804090020.0 ppb
2022-09-07CA4400559_002_002-20220907120044.0 ppb
2022-10-26CA4400559_002_002-20221026120042.0 ppb
2022-11-16CA4400559_002_002-20221116140012.0 ppb
2022-12-07CA4400559_002_002-2022120714237.80 ppb
2023-01-05CA4400559_002_002-2023010511005.70 ppb
2023-02-08CA4400559_002_002-2023020808007.30 ppb
2023-03-08CA4400559_002_002-2023030809006.50 ppb
2023-04-05CA4400559_002_002-202304051430ND
2023-05-03CA4400559_002_002-202305031400ND
2023-06-07CA4400559_002_002-202306071300ND
2023-07-12CA4400559_002_002-202307120800ND
2023-08-09CA4400559_002_002-202308090800ND
2023-09-12CA4400559_002_002-202309121500ND
2023-12-06CA4400559_002_002-202312061600ND