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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Hereford

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

 

121

Samples

0

Samples exceeding legal limit (MCL)

66

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.534 ppb199ND - 1.30 ppb
20150.935 ppb2014ND - 2.04 ppb
20160.655 ppb2210ND - 2.57 ppb
20170.690 ppb2010ND - 1.84 ppb
20180.930 ppb2012ND - 2.69 ppb
20190.913 ppb2011ND - 2.33 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
2014-02-12Q1404321012ND
2014-02-12Q14043210141.07 ppb
2014-02-12Q1404321004ND
2014-02-12Q1404321029ND
2014-02-12Q14043210011.15 ppb
2014-02-12Q14043210021.13 ppb
2014-02-12Q14043210031.29 ppb
2014-06-04Q14192620021.30 ppb
2014-06-04Q1419262003ND
2014-06-04Q14192620041.10 ppb
2014-06-04Q1419262005ND
2014-08-07Q1434599001ND
2014-08-07Q1434599002ND
2014-08-07Q1434599003ND
2014-08-07Q1434599004ND
2014-10-16Q14529180011.000 ppb
2014-10-16Q14529180021.10 ppb
2014-10-16Q1452918003ND
2014-10-16Q14529180041.000 ppb
2015-01-29Q1503619006ND
2015-01-29Q15036190031.04 ppb
2015-01-29Q1503619001ND
2015-01-29Q1503619008ND
2015-01-29Q15036190221.20 ppb
2015-01-29Q15036190231.20 ppb
2015-01-29Q15036190151.000 ppb
2015-01-29Q15036190161.40 ppb
2015-04-14Q15140980011.08 ppb
2015-04-14Q15140980021.14 ppb
2015-04-14Q1514098003ND
2015-04-14Q1514098004ND
2015-09-15Q15357820042.04 ppb
2015-09-15Q15357820011.45 ppb
2015-09-15Q15357820021.22 ppb
2015-09-15Q1535782003ND
2015-11-23Q15463840011.98 ppb
2015-11-23Q15463840021.38 ppb
2015-11-23Q15463840031.21 ppb
2015-11-23Q15463840041.35 ppb
2016-02-10Q1605969002ND
2016-02-10Q1605969003ND
2016-02-10Q16059690091.63 ppb
2016-02-10Q16059690101.42 ppb
2016-02-10Q16059690111.09 ppb
2016-02-10Q16059690121.06 ppb
2016-03-17Q1611196002ND
2016-03-17Q1611196004ND
2016-05-12Q16190850011.25 ppb
2016-05-12Q1619085002ND
2016-05-12Q1619085003ND
2016-05-12Q1619085004ND
2016-09-15Q16378420012.57 ppb
2016-09-15Q1637842002ND
2016-09-15Q1637842003ND
2016-09-15Q16378420041.39 ppb
2016-09-15Q16378420061.34 ppb
2016-10-18Q16441750021.63 ppb
2016-10-18Q1644175003ND
2016-10-18Q1644175001ND
2016-10-18Q1644175004ND
2016-10-18Q16441750051.04 ppb
2017-01-17Q17020530061.11 ppb
2017-01-17Q17020530041.12 ppb
2017-01-17Q1702053012ND
2017-01-17Q1702053005ND
2017-01-17Q17020530131.46 ppb
2017-04-10Q1714723001ND
2017-05-09Q17189980021.16 ppb
2017-05-09Q1718998012ND
2017-05-09Q1718998013ND
2017-05-09Q1718998014ND
2017-05-09Q1718998015ND
2017-07-13Q1728901008ND
2017-07-13Q17289010051.66 ppb
2017-07-13Q17289010091.11 ppb
2017-07-13Q1728901006ND
2017-07-13Q1728901010ND
2017-10-12Q17525770011.57 ppb
2017-10-12Q17525770031.52 ppb
2017-10-12Q17525770021.25 ppb
2017-10-12Q17525770041.84 ppb
2018-01-16Q1801777003ND
2018-01-16Q18017770071.64 ppb
2018-01-16Q18017770051.51 ppb
2018-01-16Q18017770011.30 ppb
2018-01-16Q1801777006ND
2018-04-12Q1815215002ND
2018-04-12Q18152150031.61 ppb
2018-04-12Q18152150091.07 ppb
2018-04-12Q1815215004ND
2018-04-12Q1815215010ND
2018-08-01Q1830563001ND
2018-08-01Q18305630062.69 ppb
2018-08-01Q18305630071.30 ppb
2018-08-01Q1830563008ND
2018-08-01Q1830563009ND
2018-10-11Q18406970081.41 ppb
2018-10-11Q18406970051.84 ppb
2018-10-11Q18406970011.34 ppb
2018-10-11Q18406970061.12 ppb
2018-10-11Q18406970021.76 ppb
2019-01-17Q1902747006ND
2019-01-17Q19027470081.97 ppb
2019-01-17Q19027470031.76 ppb
2019-01-17Q19027470091.17 ppb
2019-01-17Q19027470041.56 ppb
2019-04-23Q19161500061.19 ppb
2019-04-23Q19161500091.89 ppb
2019-04-23Q19161500041.51 ppb
2019-04-23Q1916150010ND
2019-04-23Q1916150005ND
2019-05-30Q1930309001ND
2019-07-08Q1942256001ND
2019-07-08Q19422560061.84 ppb
2019-07-08Q19422560072.33 ppb
2019-07-08Q19422560081.52 ppb
2019-07-08Q19422560091.52 ppb
2019-10-15Q1972637004ND
2019-10-15Q1972637001ND
2019-10-15Q1972637002ND
2019-10-15Q1972637003ND