Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromate

Modesto Irrigation District

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.

MORE ABOUT THIS CONTAMINANT

 

73

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
20150.142 ppb121ND - 1.70 ppb
2016ND120ND
2017ND110ND
2018ND130ND
2019ND130ND

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
2014-01-085810-003-0630ND
2014-02-065810-003-1041ND
2014-03-055810-003-0622ND
2014-04-015810-003-0912ND
2014-05-065810-003-0850ND
2014-06-025810-003-0809ND
2014-07-025810-003-0616ND
2014-08-065810-003-0645ND
2014-09-035810-003-0633ND
2014-10-095810-003-0800ND
2014-11-055810-003-0800ND
2014-12-025810-003-0945ND
2015-01-085810-003-0654ND
2015-02-105810-003-0616ND
2015-03-035810-003-0615ND
2015-04-025810-003-0940ND
2015-05-069588-003-09111.70 ppb
2015-06-045810-003-0541ND
2015-07-025810-003-0604ND
2015-08-055810-003-0849ND
2015-09-015810-003-0623ND
2015-10-015810-003-0652ND
2015-11-045810-003-0640ND
2015-12-025810-003-0619ND
2016-01-075810-003-0652ND
2016-01-135810-003-0712ND
2016-02-035810-003-1840ND
2016-03-025810-003-0948ND
2016-04-065810-003-0910ND
2016-05-045810-003-0916ND
2016-06-015810-003-0948ND
2016-07-065810-003-0507ND
2016-08-045810-003-0748ND
2016-09-075810-003-0924ND
2016-11-035810-003-0855ND
2016-12-085810-003-0702ND
2017-01-055810-003-0950ND
2017-02-025810-003-0701ND
2017-03-025810-003-0707ND
2017-04-055810-003-0621ND
2017-05-025810-003-0538ND
2017-06-015810-003-0835ND
2017-07-065810-003-0902ND
2017-08-025810-003-1359ND
2017-09-065810-003-0852ND
2017-10-055810-003-0850ND
2017-12-075810-003-0722ND
2018-01-045810-003-0835ND
2018-02-015810-003-0856ND
2018-03-015810-003-0839ND
2018-04-055810-003-1102ND
2018-05-035810-003-0939ND
2018-06-075810-003-1114ND
2018-07-315810-003-0656ND
2018-08-025810-003-0905ND
2018-09-065810-003-0900ND
2018-10-045810-003-0905ND
2018-11-085810-003-0839ND
2018-11-269588-003-0748ND
2018-12-069588-003-0841ND
2019-01-035810-003-0833ND
2019-02-075810-003-0823ND
2019-03-075810-003-0815ND
2019-04-045810-003-0800ND
2019-05-085810-003-0810ND
2019-06-065810-002-0745ND
2019-06-065810-003-0917ND
2019-07-055810-003-0814ND
2019-08-015810-003-0859ND
2019-09-055810-003-0752ND
2019-10-035810-003-0835ND
2019-11-075810-003-0841ND
2019-12-055810-003-0822ND