Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Bromate

Town of Gilbert

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.

 

120

Samples

5

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND200ND
20130.986 ppb145ND - 4.30 ppb
20141.37 ppb2115ND - 3.70 ppb
20152.22 ppb2212ND - 14.0 ppb
20163.32 ppb2120ND - 15.0 ppb
20174.50 ppb2218ND - 20.0 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
2012-01-09PVA0481-01ND
2012-01-23PVA1381-01ND
2012-03-012615629ND
2012-03-05PVC0265-01ND
2012-04-02PVD0065-01ND
2012-04-02PVD0066-01ND
2012-05-01PVE0081-01ND
2012-05-01PVE0082-01ND
2012-06-04PVF0151-01ND
2012-06-04PVF0154-01ND
2012-07-02PVG0061-01ND
2012-07-02PVG0064-01ND
2012-08-01PVH0108-01ND
2012-08-01PVH0109-01ND
2012-09-04PVI0105-01ND
2012-09-04PVI0106-01ND
2012-10-01PVJ0089-01ND
2012-10-01PVJ0090-01ND
2012-11-01PVK0035-01ND
2012-12-03PVL0066-01ND
2013-01-02PWA0048-01ND
2013-02-04PWB0155-01ND
2013-03-20PWC1355-01ND
2013-07-08550-6177-1ND
2013-07-11550-6521-1ND
2013-08-12550-8584-1ND
2013-08-27550-8955-1ND
2013-09-052013090504944.00 ppb
2013-09-052013090504951.70 ppb
2013-10-072013100701734.30 ppb
2013-10-072013100701742.30 ppb
2013-11-12201311120194ND
2013-11-26201311260346ND
2013-12-022013120200991.50 ppb
2014-01-21201401210275ND
2014-02-112014021103251.20 ppb
2014-03-04201403040332ND
2014-04-21201404220577ND
2014-04-212014042206741.30 ppb
2014-05-062014050605511.90 ppb
2014-05-22201405220486ND
2014-06-032014060306802.10 ppb
2014-06-032014060306811.10 ppb
2014-07-142014071400673.70 ppb
2014-07-222014072202712.30 ppb
2014-08-122014081205022.00 ppb
2014-08-122014081205032.00 ppb
2014-09-022014090202142.20 ppb
2014-09-022014090202152.90 ppb
2014-10-072014100705002.00 ppb
2014-10-302014110300641.20 ppb
2014-11-11201411010362ND
2014-11-112014111103631.70 ppb
2014-12-02201412030209ND
2014-12-022014120302171.20 ppb
2015-01-06201501060501ND
2015-01-072015010704051.40 ppb
2015-02-03201502030348ND
2015-03-112015031104961.90 ppb
2015-03-11201503110602ND
2015-04-01201504010564ND
2015-04-01201504010565ND
2015-05-062015050604255.00 ppb
2015-05-06201505060431ND
2015-06-0320150603036714.0 ppb
2015-06-032015060303892.80 ppb
2015-07-01201507010421ND
2015-07-012015070104233.20 ppb
2015-08-052015080503692.60 ppb
2015-08-052015080503821.000 ppb
2015-09-02201509020293ND
2015-09-022015090202943.00 ppb
2015-10-07201510070448ND
2015-10-072015100704605.60 ppb
2015-11-042015110401885.50 ppb
2015-11-042015110401892.90 ppb
2015-12-02201512020559ND
2016-01-062016010700161.10 ppb
2016-02-112016021101961.20 ppb
2016-03-022016030204381.80 ppb
2016-04-0620160406043215.0 ppb
2016-04-062016040604342.60 ppb
2016-05-042016050404263.50 ppb
2016-05-042016050404272.20 ppb
2016-06-012016060106817.20 ppb
2016-06-012016060106832.00 ppb
2016-07-062016070606114.60 ppb
2016-07-062016070606191.20 ppb
2016-08-032016080304332.40 ppb
2016-08-032016080304441.80 ppb
2016-09-072016090704985.00 ppb
2016-09-072016090704991.70 ppb
2016-10-052016100502471.70 ppb
2016-10-052016100504248.10 ppb
2016-11-022016110203782.80 ppb
2016-11-162016111601952.00 ppb
2016-12-072016120705801.90 ppb
2016-12-28201612280330ND
2017-01-042017010408091.70 ppb
2017-01-04201701040814ND
2017-02-012017020103502.80 ppb
2017-03-01201703010296ND
2017-03-292017032905152.00 ppb
2017-04-05201704050646ND
2017-04-112017040506324.30 ppb
2017-05-012017050104887.10 ppb
2017-05-012017050105102.50 ppb
2017-06-0620170606072112.0 ppb
2017-06-062017060607232.30 ppb
2017-07-0620170706057420.0 ppb
2017-07-062017070605881.40 ppb
2017-08-0120170801072917.0 ppb
2017-08-082017080107312.00 ppb
2017-09-142017091407377.70 ppb
2017-09-142017091407392.30 ppb
2017-10-042017100406264.80 ppb
2017-10-042017100406272.70 ppb
2017-11-02201711020439ND
2017-11-292017112903833.40 ppb
2017-12-062017120602822.90 ppb