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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Riverside Highland Water Company

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

 

79

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.888 ppb116ND - 2.80 ppb
20150.705 ppb106ND - 2.80 ppb
20160.622 ppb189ND - 2.30 ppb
20172.20 ppb136ND - 11.0 ppb
20181.38 ppb127ND - 5.50 ppb
20190.420 ppb154ND - 1.90 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
2014-01-064790-011-0848ND
2014-07-024790-604-13342.80 ppb
2014-07-024790-601-13141.70 ppb
2014-07-024790-603-13001.30 ppb
2014-07-024790-602-13560.770 ppb
2014-07-074790-008-0830ND
2014-10-064790-604-14401.20 ppb
2014-10-064790-010-1041ND
2014-10-064790-601-13202.00 ppb
2014-10-064790-602-1400ND
2014-10-064790-603-1419ND
2015-01-064790-601-09360.820 ppb
2015-01-064790-604-10131.30 ppb
2015-01-064790-603-0906ND
2015-01-064790-602-1036ND
2015-04-014790-003-1000ND
2015-04-024790-601-08530.510 ppb
2015-10-024790-601-12210.930 ppb
2015-10-024790-604-12432.80 ppb
2015-10-024790-603-1319ND
2015-10-024790-602-13040.690 ppb
2016-01-054790-603-0749ND
2016-01-054790-604-08392.30 ppb
2016-01-054790-602-0814ND
2016-01-054790-601-09060.600 ppb
2016-04-054790-602-11120.580 ppb
2016-04-054790-601-10530.710 ppb
2016-04-054790-604-13021.90 ppb
2016-04-054790-603-1245ND
2016-07-064790-009-0945ND
2016-07-074790-604-10341.40 ppb
2016-07-074790-602-1005ND
2016-07-074790-603-1021ND
2016-07-074790-601-09501.20 ppb
2016-10-044790-012-0825ND
2016-10-054790-601-10410.500 ppb
2016-10-054790-604-09552.00 ppb
2016-10-054790-603-0930ND
2016-10-054790-602-1009ND
2017-01-054790-011-1030ND
2017-04-054790-601-08461.20 ppb
2017-04-054790-602-0831ND
2017-04-054790-603-0813ND
2017-04-054790-604-09012.90 ppb
2017-07-055810-603-0850ND
2017-07-055810-602-1041ND
2017-07-055810-604-10552.60 ppb
2017-07-055810-601-09557.90 ppb
2017-10-045810-601-093711.0 ppb
2017-10-045810-604-10583.00 ppb
2017-10-045810-603-1012ND
2017-10-045810-602-0955ND
2018-01-055810-601-10395.50 ppb
2018-01-055810-604-12312.20 ppb
2018-01-055810-603-0946ND
2018-01-055810-602-1016ND
2018-07-104790-604-13001.80 ppb
2018-07-104790-602-1041ND
2018-07-104790-601-1236ND
2018-07-104790-603-1010ND
2018-10-094790-601-10194.00 ppb
2018-10-094790-602-10360.980 ppb
2018-10-094790-603-10570.590 ppb
2018-10-094790-604-09561.50 ppb
2019-01-034790-603-1055ND
2019-01-034790-602-1033ND
2019-01-034790-601-10101.60 ppb
2019-04-084790-603-1309ND
2019-04-084790-604-14561.90 ppb
2019-04-084790-601-14161.60 ppb
2019-04-084790-602-1348ND
2019-07-034790-604-1441ND
2019-07-034790-603-1310ND
2019-07-034790-601-1353ND
2019-07-034790-602-1339ND
2019-10-024790-604-12461.20 ppb
2019-10-024790-603-0931ND
2019-10-024790-601-1024ND
2019-10-024790-602-1000ND