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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Tri County Joint Municipal Authority

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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
201216.0 ppb1615ND - 30.6 ppb
201321.6 ppb16169.18 ppb - 31.0 ppb
201422.4 ppb1615ND - 42.4 ppb
201530.9 ppb16169.48 ppb - 51.9 ppb
201624.6 ppb16164.00 ppb - 47.8 ppb
201718.2 ppb161610.2 ppb - 26.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 121514.48 ppb
2012-03-1512 12160ND
2012-03-1512 121577.10 ppb
2012-03-1512 121545.40 ppb
2012-06-2112 2984414.4 ppb
2012-06-2112 2984729.6 ppb
2012-06-2112 2985016.1 ppb
2012-06-2112 2985322.3 ppb
2012-09-27209193819.4 ppb
2012-09-27209193820.4 ppb
2012-09-27209193815.4 ppb
2012-09-27209193823.2 ppb
2012-12-132121000-0416.9 ppb
2012-12-132121000-0230.6 ppb
2012-12-132121000-0113.0 ppb
2012-12-132121000-0317.2 ppb
2013-01-303012109-049.18 ppb
2013-01-303012109-039.71 ppb
2013-01-303012109-0210.9 ppb
2013-01-303012109-0110.9 ppb
2013-05-233052000-0425.6 ppb
2013-05-233052000-0122.9 ppb
2013-05-233052000-0224.6 ppb
2013-05-233052000-0323.4 ppb
2013-08-293082828-0124.5 ppb
2013-08-293082828-0424.6 ppb
2013-08-293082828-0323.2 ppb
2013-08-293082828-0227.1 ppb
2013-11-293120064-0331.0 ppb
2013-11-293120064-0419.0 ppb
2013-11-293120064-0129.4 ppb
2013-11-293120064-0230.2 ppb
2014-03-214031900-029.58 ppb
2014-03-214031900-019.59 ppb
2014-03-214031900-049.98 ppb
2014-03-214031900-03ND
2014-06-264062730-0334.4 ppb
2014-06-264062730-0434.0 ppb
2014-06-264062730-0228.7 ppb
2014-06-264062730-0133.3 ppb
2014-09-184091882-0431.4 ppb
2014-09-184091882-0235.8 ppb
2014-09-184091882-0340.2 ppb
2014-09-184091882-0142.4 ppb
2014-12-1914122322-0113.1 ppb
2014-12-1914122322-0212.8 ppb
2014-12-1914122322-0411.9 ppb
2014-12-1914122322-0311.8 ppb
2015-03-201257902612.3 ppb
2015-03-201257903111.3 ppb
2015-03-20125790219.48 ppb
2015-03-201257901610.4 ppb
2015-06-191295685836.6 ppb
2015-06-191295687340.7 ppb
2015-06-191295686332.1 ppb
2015-06-191295686845.2 ppb
2015-09-181333546138.8 ppb
2015-09-181333545651.9 ppb
2015-09-181333544646.0 ppb
2015-09-181333545145.6 ppb
2015-12-181369934129.7 ppb
2015-12-181369933126.2 ppb
2015-12-181369934628.4 ppb
2015-12-181369933630.2 ppb
2016-03-18140495494.00 ppb
2016-03-181404953816.0 ppb
2016-03-181404954618.0 ppb
2016-03-181404954015.0 ppb
2016-06-171516305130.9 ppb
2016-06-171449883129.3 ppb
2016-06-171449883627.1 ppb
2016-06-201449884625.9 ppb
2016-09-301500628347.8 ppb
2016-09-301500628139.0 ppb
2016-09-301500628239.4 ppb
2016-09-301500628037.9 ppb
2016-12-161545353210.9 ppb
2016-12-161545353728.4 ppb
2016-12-161545352715.4 ppb
2016-12-16154535428.33 ppb
2017-03-171587361711.9 ppb
2017-03-171587362310.7 ppb
2017-03-171587360511.9 ppb
2017-03-171587361110.2 ppb
2017-06-161634869923.4 ppb
2017-06-161634870124.5 ppb
2017-06-161634869823.1 ppb
2017-06-161634870023.9 ppb
2017-09-141681450820.0 ppb
2017-09-141681449022.0 ppb
2017-09-141681450226.0 ppb
2017-09-141681449622.0 ppb
2017-12-151724109018.0 ppb
2017-12-151724110813.0 ppb
2017-12-151724110214.0 ppb
2017-12-151724109616.0 ppb