Know Your Environment. Protect Your Health.

Bromate

City of Grand Forks

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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND60ND
20210.517 ppb123ND - 3.50 ppb
20220.558 ppb123ND - 4.20 ppb
20230.633 ppb124ND - 2.60 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
2020-07-27368143ND
2020-08-19370209ND
2020-09-16371254ND
2020-10-14372431ND
2020-11-12373892ND
2020-12-09375066ND
2021-01-13376108ND
2021-02-103769573.50 ppb
2021-03-10378020ND
2021-04-14379740ND
2021-05-12382692ND
2021-06-09382693ND
2021-07-153871141.10 ppb
2021-08-113871021.60 ppb
2021-09-08387116ND
2021-10-06390336ND
2021-11-03390338ND
2021-12-15390348ND
2022-01-05391321ND
2022-02-02393055ND
2022-03-01393057ND
2022-04-05395220ND
2022-05-03395777ND
2022-06-07397173ND
2022-07-123988504.20 ppb
2022-08-094020901.20 ppb
2022-09-064020881.30 ppb
2022-10-11403107ND
2022-11-14405519ND
2022-12-06405521ND
2023-01-03406221ND
2023-02-01407197ND
2023-03-01408768ND
2023-04-11409960ND
2023-05-02411004ND
2023-06-06412203ND
2023-07-114137222.20 ppb
2023-08-014157472.60 ppb
2023-09-054192141.60 ppb
2023-10-034181671.20 ppb
2023-11-01419552ND
2023-12-05422668ND