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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Southern California Edison Company-Santa Catalina

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

 

124

Samples

0

Samples exceeding legal limit (MCL)

67

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20146.31 ppb218ND - 40.0 ppb
20156.96 ppb1810ND - 36.0 ppb
20165.45 ppb179ND - 34.0 ppb
20179.23 ppb2212ND - 43.0 ppb
20186.66 ppb2517ND - 31.0 ppb
20196.16 ppb2111ND - 25.0 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 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
2014-05-299588-801-1355ND
2014-05-309588-800-08547.00 ppb
2014-05-309588-802-114031.0 ppb
2014-06-199588-041-1115ND
2014-07-109588-012-1030ND
2014-07-179588-019-1250ND
2014-07-179588-020-1425ND
2014-07-189588-006-1100ND
2014-07-189588-012-1250ND
2014-07-189588-016-1130ND
2014-07-189588-023-1100ND
2014-07-189588-030-1215ND
2014-07-219588-014-1130ND
2014-08-269588-800-12005.20 ppb
2014-08-269588-801-10228.60 ppb
2014-08-269588-802-115035.0 ppb
2014-10-229588-012-1100ND
2014-11-049588-005-1111ND
2014-11-179588-800-11552.40 ppb
2014-11-179588-801-10203.40 ppb
2014-11-179588-802-114040.0 ppb
2015-02-119588-800-10352.00 ppb
2015-02-119588-801-12151.60 ppb
2015-02-119588-802-141023.0 ppb
2015-06-039588-016-1030ND
2015-06-039588-019-0940ND
2015-06-039588-020-12252.90 ppb
2015-06-039588-030-1045ND
2015-06-049588-005-1130ND
2015-06-049588-006-1250ND
2015-06-049588-014-1205ND
2015-06-059588-012-1230ND
2015-06-119588-041-1145ND
2015-09-109588-801-124036.0 ppb
2015-09-109588-802-110022.0 ppb
2015-09-179588-800-11455.20 ppb
2015-11-189588-800-01051.60 ppb
2015-11-189588-802-010520.0 ppb
2015-12-079588-801-111511.0 ppb
2016-02-189588-800-11201.50 ppb
2016-02-189588-801-12003.70 ppb
2016-02-189588-802-105016.0 ppb
2016-05-199588-800-13002.00 ppb
2016-05-199588-801-11203.20 ppb
2016-05-199588-802-123027.0 ppb
2016-06-229588-005-1300ND
2016-06-229588-006-1235ND
2016-06-229588-014-1220ND
2016-06-229588-016-1120ND
2016-06-229588-019-1000ND
2016-06-229588-020-1040ND
2016-06-229588-030-1100ND
2016-09-139588-005-0920ND
2016-11-189588-800-10102.10 ppb
2016-11-189588-801-08453.20 ppb
2016-11-189588-802-110034.0 ppb
2017-02-229588-800-1100ND
2017-02-229588-801-12353.10 ppb
2017-02-229588-802-103032.0 ppb
2017-02-249588-031-11471.60 ppb
2017-05-189588-023-1100ND
2017-05-189588-031-1100ND
2017-05-239588-800-13452.60 ppb
2017-05-239588-801-122015.0 ppb
2017-05-239588-802-130041.0 ppb
2017-06-229588-014-1130ND
2017-06-239588-016-1040ND
2017-06-239588-019-1000ND
2017-06-239588-020-1330ND
2017-06-239588-023-1030ND
2017-06-239588-030-1105ND
2017-06-269588-031-1200ND
2017-08-219588-800-14104.20 ppb
2017-08-219588-801-110011.0 ppb
2017-08-229588-802-143016.0 ppb
2017-11-209588-800-11307.50 ppb
2017-11-209588-801-101026.0 ppb
2017-11-209588-802-110043.0 ppb
2018-02-219588-800-09205.60 ppb
2018-02-219588-801-12509.40 ppb
2018-02-219588-802-110531.0 ppb
2018-05-229588-800-10553.70 ppb
2018-05-229588-801-10155.50 ppb
2018-05-229588-802-101023.0 ppb
2018-06-229588-005-1240ND
2018-06-229588-006-1215ND
2018-06-259588-014-11207.00 ppb
2018-06-259588-016-1210ND
2018-06-259588-019-1030ND
2018-06-259588-020-1200ND
2018-06-259588-023-10301.10 ppb
2018-06-259588-030-1120ND
2018-06-259588-031-1220ND
2018-06-269588-012-1100ND
2018-07-249588-800-08103.40 ppb
2018-07-249588-801-11307.50 ppb
2018-07-249588-802-101022.0 ppb
2018-08-219588-801-16558.00 ppb
2018-08-219588-802-091516.0 ppb
2018-08-229588-800-09002.10 ppb
2018-11-209588-800-08302.10 ppb
2018-11-209588-801-091011.0 ppb
2018-11-209588-802-09008.20 ppb
2019-02-269588-800-1400ND
2019-02-269588-801-113018.0 ppb
2019-02-269588-802-13005.50 ppb
2019-05-209588-800-10301.80 ppb
2019-05-209588-801-114010.00 ppb
2019-05-209588-802-094525.0 ppb
2019-08-239588-800-16152.10 ppb
2019-08-239588-801-123011.0 ppb
2019-08-239588-802-165518.0 ppb
2019-09-199588-019-1310ND
2019-09-199588-020-1200ND
2019-09-199588-023-1010ND
2019-09-269588-014-1100ND
2019-09-269588-016-1215ND
2019-09-269588-030-1225ND
2019-09-269588-031-1230ND
2019-10-249588-006-1020ND
2019-11-219588-800-13475.00 ppb
2019-11-219588-801-121010.00 ppb
2019-11-219588-802-131423.0 ppb
2019-11-269588-023-1200ND