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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Regional Water Authority

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

 

352

Samples

0

Samples exceeding legal limit (MCL)

267

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.805 ppb5841ND - 3.40 ppb
20150.583 ppb5931ND - 3.80 ppb
20160.864 ppb5842ND - 5.00 ppb
20170.982 ppb6050ND - 4.30 ppb
20181.06 ppb5849ND - 4.70 ppb
20191.27 ppb5954ND - 3.40 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
2014-03-04DBP 2003919540.600 ppb
2014-03-04DBP 2003919590.600 ppb
2014-03-04DBP 2003919740.500 ppb
2014-03-04VOC1 200391963ND
2014-03-04VOC1 200391964ND
2014-03-04VOC1 200391965ND
2014-03-04VOC1 200391977ND
2014-03-04VOC1 200391978ND
2014-03-04VOC1 200391979ND
2014-03-04VOC1 2003919800.600 ppb
2014-03-04VOC1 2003920050.800 ppb
2014-03-04VOC1 200392007ND
2014-03-05DBP 2003920920.700 ppb
2014-03-05DBP 2003920930.600 ppb
2014-03-05DBP 2003920942.50 ppb
2014-03-06DBP 2003921522.10 ppb
2014-03-06DBP 2003922010.700 ppb
2014-03-06DBP 2003922020.900 ppb
2014-03-07DBP 2003923060.500 ppb
2014-03-07DBP 2003923070.600 ppb
2014-03-07DBP 2003923080.700 ppb
2014-03-25VOC1 200393100ND
2014-06-02DBP 2003969480.900 ppb
2014-06-02DBP 2003969490.900 ppb
2014-06-02DBP 2003969503.40 ppb
2014-06-03DBP 2003969591.000 ppb
2014-06-03DBP 2003969640.800 ppb
2014-06-03DBP 2003969820.700 ppb
2014-06-03DBP 2003970730.700 ppb
2014-06-05DBP 2003972293.10 ppb
2014-06-05DBP 200397327ND
2014-06-05DBP 2003973280.600 ppb
2014-06-06DBP 2003973540.600 ppb
2014-06-06DBP 2003973550.600 ppb
2014-09-02DBP 2004032720.700 ppb
2014-09-02DBP 2004032770.800 ppb
2014-09-02DBP 2004033020.600 ppb
2014-09-03DBP 2004034700.800 ppb
2014-09-03DBP 200403471ND
2014-09-03DBP 2004034721.000 ppb
2014-09-04DBP 2004035173.30 ppb
2014-09-04DBP 200403556ND
2014-09-04DBP 200403557ND
2014-09-04DBP 200403558ND
2014-09-06DBP 2004036873.10 ppb
2014-09-06DBP 200403688ND
2014-12-02DBP 200408683ND
2014-12-02DBP 2004086880.500 ppb
2014-12-02DBP 200408706ND
2014-12-02DBP 2004087480.600 ppb
2014-12-02DBP 2004087490.600 ppb
2014-12-02DBP 200408750ND
2014-12-03DBP 2004088562.70 ppb
2014-12-03DBP 2004088572.30 ppb
2014-12-04DBP 2004089462.20 ppb
2014-12-04DBP 2004089680.600 ppb
2014-12-04DBP 2004089690.600 ppb
2014-12-04DBP 2004089700.600 ppb
2015-03-02DBP 200412850ND
2015-03-02DBP 200412851ND
2015-03-03DBP 200412870ND
2015-03-03DBP 200412928ND
2015-03-03DBP 200412883ND
2015-03-03DBP 2004129290.600 ppb
2015-03-03DBP 200412863ND
2015-03-03VOC1 2004128990.600 ppb
2015-03-03VOC1 200412902ND
2015-03-03VOC1 200412900ND
2015-03-03VOC1 200412879ND
2015-03-03VOC1 2004128810.800 ppb
2015-03-03VOC1 200412907ND
2015-03-03VOC1 200412923ND
2015-03-04DBP 2004130512.00 ppb
2015-03-04VOC1 2004130221.000 ppb
2015-03-05DBP 200413154ND
2015-03-05DBP 200413155ND
2015-03-05DBP 200413156ND
2015-03-05DBP 2004131301.50 ppb
2015-03-10VOC1 200413328ND
2015-03-18VOC1 200413713ND
2015-06-01DBP 2004175632.10 ppb
2015-06-01DBP 200417603ND
2015-06-01DBP 2004176020.600 ppb
2015-06-01DBP 200417595ND
2015-06-01DBP 2004176050.800 ppb
2015-06-01DBP 2004176040.500 ppb
2015-06-02DBP 200417701ND
2015-06-02DBP 200417699ND
2015-06-02DBP 200417624ND
2015-06-02DBP 2004176290.500 ppb
2015-06-03DBP 2004178190.500 ppb
2015-06-03DBP 2004178232.60 ppb
2015-09-01DBP 2004238213.20 ppb
2015-09-01DBP 2004238670.500 ppb
2015-09-01DBP 200423812ND
2015-09-01DBP 200423829ND
2015-09-01DBP 200423866ND
2015-09-01DBP 200423868ND
2015-09-01DBP 200423807ND
2015-09-01DBP 2004238690.500 ppb
2015-09-02DBP 2004240810.500 ppb
2015-09-02DBP 2004240820.600 ppb
2015-09-02DBP 200424080ND
2015-09-04DBP 2004242713.80 ppb
2015-12-01DBP 2004295460.600 ppb
2015-12-01DBP 2004296010.800 ppb
2015-12-01DBP 2004296040.600 ppb
2015-12-01DBP 2004295560.500 ppb
2015-12-01DBP 2004296020.800 ppb
2015-12-01DBP 2004295410.500 ppb
2015-12-02DBP 2004297252.10 ppb
2015-12-02DBP 2004297512.70 ppb
2015-12-02DBP 2004297520.600 ppb
2015-12-03DBP 2004298770.800 ppb
2015-12-03DBP 2004298760.600 ppb
2015-12-03DBP 2004298750.600 ppb
2015-12-04VOC1 200429711ND
2016-02-29VOC1 200434386ND
2016-02-29VOC1 2004343871.30 ppb
2016-02-29VOC1 2004343710.700 ppb
2016-02-29VOC1 2004343721.50 ppb
2016-03-01DBP 2004344200.500 ppb
2016-03-01DBP 2004344320.500 ppb
2016-03-01DBP 2004344390.600 ppb
2016-03-01DBP 2004345180.500 ppb
2016-03-01VOC1 2004344280.800 ppb
2016-03-01VOC1 2004344310.600 ppb
2016-03-01VOC1 200434429ND
2016-03-01VOC1 200434430ND
2016-03-01VOC1 2004344741.20 ppb
2016-03-02DBP 2004346520.600 ppb
2016-03-02DBP 2004346530.600 ppb
2016-03-03DBP 2004347052.00 ppb
2016-03-03DBP 2004347342.30 ppb
2016-03-03DBP 200434790ND
2016-03-03DBP 2004347910.800 ppb
2016-03-03VOC1 200434800ND
2016-03-04DBP 2004348190.600 ppb
2016-03-04DBP 2004348200.600 ppb
2016-06-01DBP 200441025ND
2016-06-01DBP 200441026ND
2016-06-01DBP 200441037ND
2016-06-01DBP 200441054ND
2016-06-01DBP 200441055ND
2016-06-01DBP 200441056ND
2016-06-01DBP 2004410572.80 ppb
2016-06-01DBP 200441058ND
2016-06-02DBP 2004412622.70 ppb
2016-06-02DBP 200441297ND
2016-06-02DBP 200441298ND
2016-06-02DBP 2004412990.700 ppb
2016-09-06DBP 2004489690.800 ppb
2016-09-06DBP 2004489740.900 ppb
2016-09-06DBP 2004490010.600 ppb
2016-09-06DBP 200449014ND
2016-09-06DBP 2004490151.000 ppb
2016-09-06DBP 2004490160.800 ppb
2016-09-07DBP 2004492141.90 ppb
2016-09-08DBP 2004494070.600 ppb
2016-09-08DBP 2004494080.600 ppb
2016-09-09DBP 2004495000.600 ppb
2016-09-12DBP 2004495454.10 ppb
2016-09-12DBP 2004495475.00 ppb
2016-12-05DBP 2004560810.600 ppb
2016-12-05DBP 2004560830.900 ppb
2016-12-06DBP 2004560880.800 ppb
2016-12-06DBP 2004561101.000 ppb
2016-12-06DBP 2004561151.000 ppb
2016-12-06DBP 2004561750.800 ppb
2016-12-07DBP 2004563581.40 ppb
2016-12-07DBP 2004563590.700 ppb
2016-12-08DBP 200456453ND
2016-12-08DBP 2004564600.900 ppb
2016-12-08DBP 2004564611.20 ppb
2016-12-08DBP 2004564622.00 ppb
2017-02-27VOC1 200461316ND
2017-02-27VOC1 2004613170.800 ppb
2017-02-27VOC1 2004613010.700 ppb
2017-02-28VOC1 200461369ND
2017-02-28VOC1 200461372ND
2017-02-28VOC1 200461370ND
2017-02-28VOC1 200461371ND
2017-02-28VOC1 2004614051.40 ppb
2017-02-28VOC1 200461407ND
2017-03-01DBP 2004614960.700 ppb
2017-03-01DBP 2004615420.700 ppb
2017-03-01DBP 2004615430.700 ppb
2017-03-01DBP 2004615440.700 ppb
2017-03-01DBP 2004615450.900 ppb
2017-03-01DBP 2004615461.10 ppb
2017-03-02DBP 2004616500.700 ppb
2017-03-02DBP 2004616510.700 ppb
2017-03-02DBP 2004616730.800 ppb
2017-03-02DBP 2004616740.800 ppb
2017-03-02DBP 2004616752.40 ppb
2017-03-02VOC1 2004616330.600 ppb
2017-03-03DBP 2004617271.70 ppb
2017-06-05DBP 200468420ND
2017-06-05DBP 2004684210.900 ppb
2017-06-06DBP 2004684760.700 ppb
2017-06-06DBP 2004684810.800 ppb
2017-06-06DBP 200468500ND
2017-06-07DBP 2004686692.70 ppb
2017-06-07DBP 200468670ND
2017-06-08DBP 2004688502.60 ppb
2017-06-08DBP 2004689460.600 ppb
2017-06-08DBP 2004689470.600 ppb
2017-06-08DBP 2004689480.900 ppb
2017-06-08DBP 2004689492.00 ppb
2017-06-19VOC1 2004696872.80 ppb
2017-06-19VOC1 200469688ND
2017-09-05DBP 2004757850.700 ppb
2017-09-05DBP 2004757900.800 ppb
2017-09-05DBP 2004758000.700 ppb
2017-09-07DBP 2004761043.60 ppb
2017-09-07DBP 2004762200.700 ppb
2017-09-07DBP 2004762210.800 ppb
2017-09-07DBP 2004762220.900 ppb
2017-09-07DBP 2004762241.40 ppb
2017-09-08DBP 2004763020.900 ppb
2017-09-08DBP 2004763040.900 ppb
2017-09-08DBP 2004763050.600 ppb
2017-09-08DBP 2004763064.30 ppb
2017-12-05DBP 2004833760.800 ppb
2017-12-05DBP 2004833810.800 ppb
2017-12-05DBP 2004833910.700 ppb
2017-12-07DBP 2004837700.700 ppb
2017-12-07DBP 2004837710.700 ppb
2017-12-07DBP 2004837720.600 ppb
2017-12-07DBP 2004837732.80 ppb
2017-12-07DBP 2004837740.600 ppb
2017-12-08DBP 2004838342.20 ppb
2017-12-08DBP 2004838430.900 ppb
2017-12-08DBP 2004838440.800 ppb
2017-12-08DBP 2004838451.000 ppb
2018-03-05VOC1 200489156ND
2018-03-05VOC1 200489128ND
2018-03-05VOC1 2004891291.20 ppb
2018-03-05VOC1 2004891500.500 ppb
2018-03-06DBP 200489268ND
2018-03-06DBP 200489275ND
2018-03-06DBP 200489287ND
2018-03-06VOC1 2004892950.600 ppb
2018-03-06VOC1 2004892980.900 ppb
2018-03-06VOC1 200489296ND
2018-03-07DBP 2004895372.20 ppb
2018-03-07DBP 2004895380.500 ppb
2018-03-07DBP 2004895390.500 ppb
2018-03-07DBP 200489540ND
2018-03-07DBP 2004895410.700 ppb
2018-03-08DBP 2004895652.00 ppb
2018-03-09DBP 2004897010.500 ppb
2018-03-09DBP 2004897020.500 ppb
2018-03-09DBP 200489703ND
2018-06-05DBP 2004959840.900 ppb
2018-06-05DBP 2004959890.900 ppb
2018-06-05DBP 2004960020.900 ppb
2018-06-06DBP 2004962350.800 ppb
2018-06-07DBP 2004963750.700 ppb
2018-06-07DBP 2004963760.800 ppb
2018-06-07DBP 2004964173.20 ppb
2018-06-08DBP 2004965071.10 ppb
2018-06-08DBP 2004965080.700 ppb
2018-06-08DBP 2004965091.10 ppb
2018-06-08DBP 2004965101.000 ppb
2018-06-08DBP 2004965111.000 ppb
2018-08-17VOC1 2005027352.00 ppb
2018-09-04DBP 2005037321.20 ppb
2018-09-04DBP 2005037371.10 ppb
2018-09-04DBP 2005038421.000 ppb
2018-09-04DBP 2005039121.000 ppb
2018-09-04DBP 2005039131.000 ppb
2018-09-04DBP 2005039141.30 ppb
2018-09-05DBP 2005039811.000 ppb
2018-09-05DBP 2005040861.000 ppb
2018-09-05DBP 2005040873.90 ppb
2018-09-06DBP 2005041854.70 ppb
2018-09-06DBP 2005042111.40 ppb
2018-09-07DBP 2005044411.30 ppb
2018-11-29VOC1 200514106ND
2018-11-29VOC1 2005141211.80 ppb
2018-12-03DBP 2005143723.20 ppb
2018-12-03DBP 2005144061.20 ppb
2018-12-04DBP 2005144471.10 ppb
2018-12-04DBP 2005144521.10 ppb
2018-12-04DBP 2005146251.20 ppb
2018-12-04DBP 2005146261.30 ppb
2018-12-04DBP 2005146270.900 ppb
2018-12-04DBP 2005146280.700 ppb
2018-12-04DBP 2005146291.50 ppb
2018-12-05DBP 2005149520.900 ppb
2018-12-06DBP 2005150690.900 ppb
2018-12-06DBP 2005150700.800 ppb
2019-03-04DBP 2005232150.700 ppb
2019-03-04DBP 2005232170.800 ppb
2019-03-04VOC1 200523150ND
2019-03-04VOC1 2005231510.900 ppb
2019-03-04VOC1 2005231750.600 ppb
2019-03-04VOC1 2005231761.80 ppb
2019-03-05DBP 2005232620.900 ppb
2019-03-05DBP 2005232690.800 ppb
2019-03-05DBP 2005234560.800 ppb
2019-03-05DBP 2005234570.900 ppb
2019-03-05DBP 2005234580.800 ppb
2019-03-05DBP 2005234591.10 ppb
2019-03-05DBP 2005234632.20 ppb
2019-03-05VOC1 2005232511.000 ppb
2019-03-05VOC1 2005232540.600 ppb
2019-03-05VOC1 200523252ND
2019-03-05VOC1 200523253ND
2019-03-05VOC1 2005232840.900 ppb
2019-03-05VOC1 200523286ND
2019-03-07DBP 2005238840.700 ppb
2019-03-08DBP 2005240000.800 ppb
2019-03-08DBP 2005240020.800 ppb
2019-05-08VOC1 200531298ND
2019-06-03DBP 2005343731.80 ppb
2019-06-03DBP 2005344143.30 ppb
2019-06-04DBP 2005344911.60 ppb
2019-06-04DBP 2005344961.60 ppb
2019-06-04DBP 2005346001.50 ppb
2019-06-04DBP 2005347252.70 ppb
2019-06-04DBP 2005347271.80 ppb
2019-06-04DBP 2005347291.90 ppb
2019-06-05DBP 2005350391.70 ppb
2019-06-05DBP 2005350411.40 ppb
2019-06-06DBP 2005351971.50 ppb
2019-06-07DBP 2005353571.50 ppb
2019-09-03DBP 2005469881.40 ppb
2019-09-03DBP 2005469931.70 ppb
2019-09-04DBP 2005474002.80 ppb
2019-09-04DBP 2005474021.50 ppb
2019-09-04DBP 2005474031.60 ppb
2019-09-04DBP 2005474041.80 ppb
2019-09-04DBP 2005474051.50 ppb
2019-09-05DBP 2005474603.40 ppb
2019-09-05DBP 2005476671.50 ppb
2019-09-06DBP 2005478261.30 ppb
2019-09-06DBP 2005478271.50 ppb
2019-09-06DBP 2005478281.20 ppb
2019-12-02DBP 2005584050.900 ppb
2019-12-02DBP 2005584061.30 ppb
2019-12-02DBP 2005584071.10 ppb
2019-12-03DBP 2005584541.000 ppb
2019-12-03DBP 2005584591.000 ppb
2019-12-03DBP 2005586121.000 ppb
2019-12-04DBP 2005589161.10 ppb
2019-12-04DBP 2005589171.20 ppb
2019-12-04DBP 2005589192.60 ppb
2019-12-05DBP 2005590731.000 ppb
2019-12-05DBP 2005590981.000 ppb
2019-12-06DBP 2005591951.000 ppb