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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Aqua Water Supply Corporation

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

146

Samples

0

Samples exceeding legal limit (MCL)

140

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201415.4 ppb19192.90 ppb - 31.9 ppb
201511.9 ppb2726ND - 27.9 ppb
201613.5 ppb2423ND - 31.9 ppb
201712.2 ppb2524ND - 29.4 ppb
201811.6 ppb2725ND - 33.1 ppb
201910.6 ppb2423ND - 20.7 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 dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-05AC414993.80 ppb
2014-02-05AC415012.90 ppb
2014-03-10AC462184.90 ppb
2014-03-10AC4621520.3 ppb
2014-03-10AC4621418.8 ppb
2014-03-10AC4621615.1 ppb
2014-04-14AC503495.30 ppb
2014-04-14AC5039517.6 ppb
2014-04-14AC5035623.9 ppb
2014-04-14AC5039415.8 ppb
2014-08-13AC635735.90 ppb
2014-08-13AC6356116.5 ppb
2014-08-13AC6356431.9 ppb
2014-08-13AC6356218.8 ppb
2014-08-13AC634093.10 ppb
2014-10-22AC703086.20 ppb
2014-10-22AC7030922.4 ppb
2014-10-22AC7031229.9 ppb
2014-10-22AC7031329.8 ppb
2015-02-09AC79746ND
2015-02-09AC797501.70 ppb
2015-02-09AC797447.20 ppb
2015-02-09AC797426.30 ppb
2015-02-09AC797521.30 ppb
2015-02-09AC797484.00 ppb
2015-02-09AC796848.20 ppb
2015-02-09AC7968523.3 ppb
2015-02-09AC7968725.3 ppb
2015-02-09AC7968619.9 ppb
2015-02-10AC799731.10 ppb
2015-02-10AC799853.20 ppb
2015-02-10AC799811.40 ppb
2015-02-10AC799834.30 ppb
2015-02-10AC799772.70 ppb
2015-04-13AC879566.60 ppb
2015-04-13AC8795915.5 ppb
2015-04-13AC8795719.0 ppb
2015-04-14AC8809913.3 ppb
2015-07-10AC990309.00 ppb
2015-07-10AC9902915.2 ppb
2015-07-10AC9903127.9 ppb
2015-07-10AC9902826.7 ppb
2015-10-15AD108047.20 ppb
2015-10-15AD1080319.8 ppb
2015-10-15AD1080523.2 ppb
2015-10-15AD1080626.9 ppb
2016-01-26AD201244.20 ppb
2016-01-26AD201206.60 ppb
2016-01-26AD201223.30 ppb
2016-01-26AD20138ND
2016-01-26AD201303.10 ppb
2016-01-26AD201181.90 ppb
2016-01-26AD201161.80 ppb
2016-01-26AD201342.60 ppb
2016-01-26AD200657.80 ppb
2016-01-26AD2004918.1 ppb
2016-01-26AD2005321.0 ppb
2016-01-26AD2005919.8 ppb
2016-04-19AD334457.40 ppb
2016-04-19AD3344417.2 ppb
2016-04-19AD3344323.7 ppb
2016-04-19AD3344221.5 ppb
2016-07-26AD456447.90 ppb
2016-07-26AD4565715.6 ppb
2016-07-26AD4565622.9 ppb
2016-07-26AD4564125.3 ppb
2016-10-18AD535469.20 ppb
2016-10-18AD5354419.4 ppb
2016-10-18AD5354731.5 ppb
2016-10-18AD5355331.9 ppb
2017-01-11AD643365.10 ppb
2017-01-11AD643229.50 ppb
2017-01-11AD643342.80 ppb
2017-01-11AD643322.20 ppb
2017-01-11AD6428312.5 ppb
2017-01-11AD6428217.3 ppb
2017-01-12AD647763.50 ppb
2017-01-12AD647821.20 ppb
2017-01-12AD64786ND
2017-01-12AD647806.60 ppb
2017-01-12AD647782.60 ppb
2017-01-12AD647055.90 ppb
2017-01-12AD647069.40 ppb
2017-04-05AD785287.60 ppb
2017-04-05AD7852617.9 ppb
2017-04-05AD7852122.4 ppb
2017-04-05AD7852319.8 ppb
2017-09-18AD965099.90 ppb
2017-09-18AD9650515.8 ppb
2017-09-18AD9650427.7 ppb
2017-09-18AD9650829.4 ppb
2017-10-25AE020778.70 ppb
2017-10-25AE0207616.8 ppb
2017-10-25AE0209126.3 ppb
2017-10-25AE0207823.0 ppb
2018-01-25AE106042.60 ppb
2018-01-25AE10548ND
2018-01-25AE105543.30 ppb
2018-01-25AE105425.30 ppb
2018-01-25AE106247.40 ppb
2018-01-25AE106104.50 ppb
2018-01-25AE10546ND
2018-01-25AE106205.90 ppb
2018-01-25AE105522.70 ppb
2018-01-25AE105447.70 ppb
2018-01-25AE105503.10 ppb
2018-01-25AE105047.50 ppb
2018-01-25AE1049213.4 ppb
2018-01-25AE1047815.6 ppb
2018-01-25AE1052315.5 ppb
2018-04-09AE216228.50 ppb
2018-04-09AE2162615.8 ppb
2018-04-09AE2163219.9 ppb
2018-04-09AE2162719.4 ppb
2018-08-24AE384137.30 ppb
2018-08-24AE3840713.2 ppb
2018-08-24AE3841124.3 ppb
2018-08-24AE3841220.2 ppb
2018-10-16AE4358811.7 ppb
2018-10-16AE4358920.6 ppb
2018-10-16AE4359023.8 ppb
2018-10-16AE4359133.1 ppb
2019-03-15AE585297.20 ppb
2019-03-15AE5853112.8 ppb
2019-03-15AE5852815.9 ppb
2019-03-15AE5853014.5 ppb
2019-05-15AE665203.40 ppb
2019-05-15AE665267.50 ppb
2019-05-15AE66528ND
2019-05-15AE665181.10 ppb
2019-05-15AE665225.20 ppb
2019-05-15AE665242.00 ppb
2019-05-15AE665302.10 ppb
2019-05-15AE6653212.0 ppb
2019-05-15AE664688.10 ppb
2019-05-15AE6648420.6 ppb
2019-05-15AE6647015.5 ppb
2019-05-15AE6647120.7 ppb
2019-08-16AE791047.60 ppb
2019-08-16AE7910515.6 ppb
2019-08-16AE7910712.9 ppb
2019-08-16AE7910813.4 ppb
2019-11-15AE893417.50 ppb
2019-11-15AE8933813.8 ppb
2019-11-15AE8934014.2 ppb
2019-11-15AE8933920.7 ppb