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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Bear Valley Joint 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

 

98

Samples

0

Samples exceeding legal limit (MCL)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.223 ppb186ND - 0.785 ppb
20150.984 ppb1612ND - 3.00 ppb
20160.625 ppb168ND - 2.00 ppb
20171.06 ppb169ND - 2.00 ppb
20181.72 ppb1614ND - 3.00 ppb
20191.88 ppb1613ND - 3.00 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
2014-01-0714010615-004ND
2014-01-0714010615-001ND
2014-01-0714010615-002ND
2014-01-0714010615-003ND
2014-04-0814041219-0010.785 ppb
2014-04-0814041219-004ND
2014-04-0814041219-0020.758 ppb
2014-04-0814041219-0030.749 ppb
2014-07-0814071184-001ND
2014-07-0814071184-004ND
2014-07-0814071184-0020.573 ppb
2014-07-0814071184-003ND
2014-10-0714101404-001ND
2014-10-0714101404-004ND
2014-10-0714101404-003ND
2014-10-0714101404-002ND
2014-12-3014122777-0020.534 ppb
2014-12-3014122777-0010.606 ppb
2015-01-1212371185ND
2015-01-12123711520.866 ppb
2015-01-12123711630.865 ppb
2015-01-12123711740.856 ppb
2015-04-07127179510.571 ppb
2015-04-0712717953ND
2015-04-07127179460.951 ppb
2015-04-07127179570.633 ppb
2015-09-30133577471.000 ppb
2015-09-3013357771ND
2015-09-30133577592.00 ppb
2015-09-30133577561.000 ppb
2015-10-07134798893.00 ppb
2015-10-0713479898ND
2015-10-07134798782.00 ppb
2015-10-07134798682.00 ppb
2016-01-1213839184ND
2016-01-1213839204ND
2016-01-1213839192ND
2016-01-1213839173ND
2016-04-1214211971ND
2016-04-12142119531.000 ppb
2016-04-1214211974ND
2016-04-12142119641.000 ppb
2016-07-12146946091.000 ppb
2016-07-12146946292.00 ppb
2016-07-1214694634ND
2016-07-12146946202.00 ppb
2016-10-11151899221.000 ppb
2016-10-11151899191.000 ppb
2016-10-1115189940ND
2016-10-11151899341.000 ppb
2017-01-1015620573ND
2017-01-1015620581ND
2017-01-1015620567ND
2017-01-1015620591ND
2017-04-11160530382.00 ppb
2017-04-11160530362.00 ppb
2017-04-11160530502.00 ppb
2017-04-1116053057ND
2017-07-11165265222.00 ppb
2017-07-1116526548ND
2017-07-11165265371.000 ppb
2017-07-11165265322.00 ppb
2017-10-1016987517ND
2017-10-10169875062.00 ppb
2017-10-10169874962.00 ppb
2017-10-10169875112.00 ppb
2018-01-09(714) SP 714ND
2018-01-09(711) SP 7111.000 ppb
2018-01-09(713) SP 7131.000 ppb
2018-01-09(712) SP 7121.000 ppb
2018-04-10(714) SP 714ND
2018-04-10(711) SP 7112.00 ppb
2018-04-10(713) SP 7132.00 ppb
2018-04-10(712) SP 7122.00 ppb
2018-07-10(711) SP 7113.00 ppb
2018-07-10(714) SP 7141.000 ppb
2018-07-10(713) SP 7133.00 ppb
2018-07-10(712) SP 7123.00 ppb
2018-10-09(713) SP 7132.00 ppb
2018-10-09(712) SP 7123.00 ppb
2018-10-09AF991270.500 ppb
2018-10-09(711) SP 7113.00 ppb
2019-01-08(713) SP 7132.00 ppb
2019-01-08(714) SP 714ND
2019-01-08(711) SP 7112.00 ppb
2019-01-08(712) SP 7122.00 ppb
2019-04-09(711) SP 7112.00 ppb
2019-04-09(712) SP 7122.00 ppb
2019-04-09(713) SP 7132.00 ppb
2019-04-09(714) SP 714ND
2019-07-09(711) SP 7113.00 ppb
2019-07-09(712) SP 7123.00 ppb
2019-07-09(713) SP 7132.00 ppb
2019-07-09(714) SP 714ND
2019-10-08(711) SP 7113.00 ppb
2019-10-08(712) SP 7123.00 ppb
2019-10-08(713) SP 7133.00 ppb
2019-10-08(714) SP 7141.000 ppb