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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Tri County Joint Municipal Authority

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

94

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201210.9 ppb1615ND - 30.9 ppb
20136.53 ppb16162.67 ppb - 14.2 ppb
20148.65 ppb1615ND - 34.4 ppb
201522.6 ppb16161.79 ppb - 56.8 ppb
201614.1 ppb16161.05 ppb - 39.2 ppb
20176.03 ppb16163.08 ppb - 10.00 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
2012-03-1512 121511.10 ppb
2012-03-1512 12160ND
2012-03-1512 121571.86 ppb
2012-03-1512 121541.41 ppb
2012-06-2112 2984414.6 ppb
2012-06-2112 2984730.9 ppb
2012-06-2112 2985017.1 ppb
2012-06-2112 2985323.5 ppb
2012-09-27209193813.4 ppb
2012-09-27209193814.4 ppb
2012-09-27209193811.0 ppb
2012-09-27209193816.0 ppb
2012-12-132121000-045.08 ppb
2012-12-132121000-0214.7 ppb
2012-12-132121000-012.05 ppb
2012-12-132121000-036.66 ppb
2013-01-303012109-042.67 ppb
2013-01-303012109-033.06 ppb
2013-01-303012109-023.20 ppb
2013-01-303012109-014.14 ppb
2013-05-233052000-044.63 ppb
2013-05-233052000-015.58 ppb
2013-05-233052000-025.48 ppb
2013-05-233052000-035.13 ppb
2013-08-293082828-016.05 ppb
2013-08-293082828-045.54 ppb
2013-08-293082828-035.62 ppb
2013-08-293082828-025.88 ppb
2013-11-293120064-0314.1 ppb
2013-11-293120064-045.76 ppb
2013-11-293120064-0113.5 ppb
2013-11-293120064-0214.2 ppb
2014-03-214031900-022.35 ppb
2014-03-214031900-012.77 ppb
2014-03-214031900-042.49 ppb
2014-03-214031900-03ND
2014-06-264062730-0334.4 ppb
2014-06-264062730-048.71 ppb
2014-06-264062730-027.34 ppb
2014-06-264062730-018.10 ppb
2014-09-184091882-0415.2 ppb
2014-09-184091882-0212.9 ppb
2014-09-184091882-0314.7 ppb
2014-09-184091882-0118.9 ppb
2014-12-1914122322-012.90 ppb
2014-12-1914122322-022.80 ppb
2014-12-1914122322-042.50 ppb
2014-12-1914122322-032.30 ppb
2015-03-20125790272.27 ppb
2015-03-20125790321.79 ppb
2015-03-20125790222.09 ppb
2015-03-20125790172.01 ppb
2015-06-191295685924.1 ppb
2015-06-191295687428.0 ppb
2015-06-191295686421.8 ppb
2015-06-191295686925.0 ppb
2015-09-181333546256.6 ppb
2015-09-181333545756.1 ppb
2015-09-181333544756.8 ppb
2015-09-181333545254.9 ppb
2015-12-18136993427.52 ppb
2015-12-18136993327.53 ppb
2015-12-18136993477.18 ppb
2015-12-18136993378.65 ppb
2016-03-181404955017.0 ppb
2016-03-18140495373.00 ppb
2016-03-18140495434.00 ppb
2016-03-18140495392.00 ppb
2016-06-17151630526.69 ppb
2016-06-171449883211.8 ppb
2016-06-17144988375.91 ppb
2016-06-20144988477.93 ppb
2016-09-301500628739.2 ppb
2016-09-301500628638.8 ppb
2016-09-301500628436.7 ppb
2016-09-301500628537.8 ppb
2016-12-16154535331.68 ppb
2016-12-16154535387.98 ppb
2016-12-16154535283.32 ppb
2016-12-16154535431.05 ppb
2017-03-17158736183.55 ppb
2017-03-17158736243.16 ppb
2017-03-17158736063.08 ppb
2017-03-17158736123.62 ppb
2017-06-16163487035.76 ppb
2017-06-16163487045.77 ppb
2017-06-16163487025.56 ppb
2017-06-16163487055.98 ppb
2017-09-14168145096.00 ppb
2017-09-14168144918.00 ppb
2017-09-141681450310.00 ppb
2017-09-14168144978.00 ppb
2017-12-15172410916.00 ppb
2017-12-15172411099.00 ppb
2017-12-15172411036.00 ppb
2017-12-15172410977.00 ppb