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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of East Palo Alto

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND120ND
20150.225 ppb163ND - 1.30 ppb
2016ND160ND
2017ND160ND
20180.341 ppb164ND - 1.42 ppb
20190.326 ppb164ND - 1.33 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
2014-04-099553-903-0935ND
2014-04-099553-902-1007ND
2014-04-099553-901-0950ND
2014-04-099553-900-1028ND
2014-07-089553-903-1418ND
2014-07-089553-902-1402ND
2014-07-089553-901-1330ND
2014-07-089553-900-1352ND
2014-10-079553-903-1030ND
2014-10-079553-902-1010ND
2014-10-079553-901-0950ND
2014-10-079553-900-0930ND
2015-01-069590-901-10251.10 ppb
2015-01-069590-902-10401.30 ppb
2015-01-069590-903-1005ND
2015-01-069590-900-09351.20 ppb
2015-04-089590-903-1035ND
2015-04-089590-902-1010ND
2015-04-089590-901-0957ND
2015-04-089590-900-0935ND
2015-07-029553-900-1000ND
2015-07-029553-901-1020ND
2015-07-029553-902-1040ND
2015-07-029553-903-1100ND
2015-10-069553-903-0930ND
2015-10-069553-902-0915ND
2015-10-069553-900-0845ND
2015-10-069553-901-0900ND
2016-01-059553-902-1000ND
2016-01-059553-901-0945ND
2016-01-059553-903-1030ND
2016-01-059553-900-0930ND
2016-04-059553-901-1030ND
2016-04-059553-902-1100ND
2016-04-059553-900-1000ND
2016-04-059553-903-1130ND
2016-07-079553-901-1015ND
2016-07-079553-900-1000ND
2016-07-079553-902-1045ND
2016-07-079553-903-1100ND
2016-10-179553-902-1100ND
2016-10-179553-901-1200ND
2016-10-179553-900-1000ND
2016-10-179553-903-1115ND
2017-01-099553-902-0930ND
2017-01-099553-903-1000ND
2017-01-099553-901-0915ND
2017-01-099553-900-0900ND
2017-04-109553-903-1150ND
2017-04-109553-902-1132ND
2017-04-109553-901-1122ND
2017-04-109553-900-1110ND
2017-07-059553-902-0910ND
2017-07-059553-901-1020ND
2017-07-059553-903-0950ND
2017-07-059553-900-1050ND
2017-10-059553-900-0844ND
2017-10-059553-901-0907ND
2017-10-059553-903-1015ND
2017-10-059553-902-0930ND
2018-02-129553-900-1126ND
2018-02-129553-903-0958ND
2018-02-129553-901-1056ND
2018-03-059553-902-0900ND
2018-05-099553-903-1239ND
2018-05-099553-901-1258ND
2018-05-099553-902-1220ND
2018-05-099553-900-1317ND
2018-08-079553-900-1100ND
2018-08-079553-903-1030ND
2018-08-079553-901-1045ND
2018-08-079553-902-0930ND
2018-11-069553-900-10301.36 ppb
2018-11-069553-902-09001.36 ppb
2018-11-069553-903-09501.32 ppb
2018-11-069553-901-10101.42 ppb
2019-02-049553-902-09221.31 ppb
2019-02-049553-903-10281.31 ppb
2019-02-049553-900-12191.33 ppb
2019-02-049553-901-11211.26 ppb
2019-05-079553-903-0921ND
2019-05-079553-902-0859ND
2019-05-079553-900-0813ND
2019-05-079553-901-0840ND
2019-08-069553-903-0838ND
2019-08-069553-902-0812ND
2019-08-069553-901-0905ND
2019-08-069553-900-0933ND
2019-11-049553-903-0956ND
2019-11-049553-902-0903ND
2019-11-049553-900-1130ND
2019-11-049553-901-1043ND