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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

SBDNO County Service Area 64

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND110ND
20150.164 ppb223ND - 1.30 ppb
20160.208 ppb122ND - 1.30 ppb
2017ND140ND
20181.68 ppb1911ND - 18.7 ppb
20190.406 ppb165ND - 1.60 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
2014-01-143761-002-1255ND
2014-01-143761-004-1325ND
2014-01-143761-005-1430ND
2014-01-293761-001-1415ND
2014-01-293761-002-1200ND
2014-01-293761-005-1045ND
2014-01-293761-004-1310ND
2014-10-013761-602-1330ND
2014-10-023761-604-1100ND
2014-10-023761-601-1200ND
2014-10-023761-603-1130ND
2015-01-053761-002-1220ND
2015-01-053761-604-1320ND
2015-01-053761-603-1425ND
2015-01-063761-601-1030ND
2015-01-063761-602-10001.30 ppb
2015-04-013761-001-1320ND
2015-04-023761-601-1130ND
2015-04-023761-604-1000ND
2015-04-023761-603-1100ND
2015-04-023761-602-12501.20 ppb
2015-07-023761-603-1100ND
2015-07-023761-604-0930ND
2015-07-023761-602-1145ND
2015-07-023761-601-11151.10 ppb
2015-07-243761-006-1630ND
2015-07-303761-006-1525ND
2015-08-023761-006-0700ND
2015-08-043761-006-0700ND
2015-10-053761-604-1230ND
2015-10-053761-603-1330ND
2015-10-063761-601-1400ND
2015-10-063761-602-1325ND
2016-01-043761-602-10101.30 ppb
2016-01-073761-601-1010ND
2016-01-073761-603-0940ND
2016-01-073761-604-0900ND
2016-04-053761-602-13301.20 ppb
2016-04-063761-603-1130ND
2016-04-063761-604-1100ND
2016-04-063761-601-1155ND
2016-10-033761-603-1130ND
2016-10-033761-601-1200ND
2016-10-033761-604-1100ND
2016-10-033761-602-1245ND
2017-01-033761-601-1255ND
2017-01-033761-602-1320ND
2017-01-033761-603-1215ND
2017-01-033761-005-1015ND
2017-01-033761-604-1145ND
2017-01-053761-004-0930ND
2017-07-053761-601-1220ND
2017-07-053761-604-1050ND
2017-07-053761-602-1315ND
2017-07-053761-603-1150ND
2017-10-023761-603-1215ND
2017-10-023761-604-1130ND
2017-10-023761-602-1310ND
2017-10-023761-601-1245ND
2018-01-033761-603-1115ND
2018-01-033761-602-12451.10 ppb
2018-01-033761-601-13151.000 ppb
2018-01-043761-604-10101.50 ppb
2018-04-023761-604-11301.10 ppb
2018-04-023761-001-1215ND
2018-04-023761-602-13101.60 ppb
2018-04-023761-002-1055ND
2018-04-053761-603-09301.60 ppb
2018-04-053761-601-09551.50 ppb
2018-07-023761-603-1240ND
2018-07-023761-601-1215ND
2018-07-023761-604-104518.7 ppb
2018-07-253761-604-1415ND
2018-10-023761-603-10301.000 ppb
2018-10-023761-602-11101.70 ppb
2018-10-023761-601-10501.10 ppb
2018-10-023761-604-0945ND
2018-10-024790-604-0945ND
2019-01-023761-603-11301.30 ppb
2019-01-023761-604-1020ND
2019-01-023761-601-1230ND
2019-01-023761-602-12501.30 ppb
2019-04-013761-604-1030ND
2019-04-013761-603-1100ND
2019-04-013761-602-12001.20 ppb
2019-04-013761-601-1130ND
2019-07-013761-604-1115ND
2019-07-013761-603-1150ND
2019-07-013761-602-12551.10 ppb
2019-07-013761-601-1230ND
2019-10-013761-604-1120ND
2019-10-013761-603-1210ND
2019-10-013761-602-12501.60 ppb
2019-10-013761-601-1230ND