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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Nps-wolverton

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.

MORE ABOUT THIS CONTAMINANT

 

93

Samples

0

Samples exceeding legal limit (MCL)

50

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.112 ppb61ND - 0.670 ppb
20150.174 ppb72ND - 0.710 ppb
20160.443 ppb84ND - 1.10 ppb
20171.05 ppb2210ND - 5.00 ppb
20181.32 ppb2616ND - 6.00 ppb
20192.33 ppb2417ND - 16.0 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
2014-02-205802-901-0810ND
2014-02-205802-900-0800ND
2014-07-085802-901-0750ND
2014-07-085802-900-0735ND
2014-11-195802-901-0915ND
2014-11-195802-900-09000.670 ppb
2015-06-175802-900-08150.510 ppb
2015-06-175802-901-0830ND
2015-06-235802-001-0715ND
2015-08-265802-900-1145ND
2015-08-265802-901-1130ND
2015-11-185802-900-0940ND
2015-11-185802-901-09500.710 ppb
2016-03-025802-900-09300.570 ppb
2016-03-025802-901-09451.10 ppb
2016-05-235802-900-0630ND
2016-05-235802-901-0645ND
2016-07-275802-900-0920ND
2016-07-275802-901-0930ND
2016-11-165802-900-09450.770 ppb
2016-11-165802-901-10001.10 ppb
2017-02-155802-900-0945ND
2017-02-155802-901-1000ND
2017-03-085802-901-0805ND
2017-03-085802-900-0826ND
2017-04-255867-900-0930ND
2017-04-255867-901-09401.000 ppb
2017-05-105867-900-0751ND
2017-05-105867-901-07305.00 ppb
2017-06-215867-900-0807ND
2017-06-215867-901-07433.00 ppb
2017-07-265867-900-0805ND
2017-07-265867-901-07523.00 ppb
2017-08-305867-900-0809ND
2017-08-305867-901-07513.00 ppb
2017-09-275867-900-08351.000 ppb
2017-09-275867-901-08002.00 ppb
2017-10-255867-901-08152.00 ppb
2017-10-255867-900-0836ND
2017-11-215867-901-07371.000 ppb
2017-11-215867-900-0800ND
2017-12-205867-901-07342.00 ppb
2017-12-205867-900-0756ND
2018-01-105802-901-0815ND
2018-01-175867-900-0806ND
2018-01-175867-901-08361.000 ppb
2018-01-245802-901-0751ND
2018-01-315802-901-08271.20 ppb
2018-02-075867-900-0844ND
2018-02-075867-901-08161.000 ppb
2018-02-145802-901-08411.20 ppb
2018-02-285802-901-07301.20 ppb
2018-03-075867-900-07532.00 ppb
2018-03-075867-901-08564.00 ppb
2018-03-285802-901-07450.740 ppb
2018-06-275867-901-0828ND
2018-06-275867-900-09025.00 ppb
2018-07-185867-901-1015ND
2018-07-185867-900-10306.00 ppb
2018-08-155867-901-08101.000 ppb
2018-08-155867-900-08544.00 ppb
2018-09-265867-900-0923ND
2018-09-265867-901-08201.000 ppb
2018-10-315867-900-0850ND
2018-10-315867-901-08052.00 ppb
2018-11-145867-900-0858ND
2018-11-145867-901-08061.000 ppb
2018-12-125867-901-08302.00 ppb
2018-12-125867-900-0910ND
2019-01-165867-900-0900ND
2019-01-165867-901-08302.00 ppb
2019-02-135867-901-08301.000 ppb
2019-02-135867-900-0845ND
2019-03-205867-901-07561.000 ppb
2019-03-205867-900-1025ND
2019-04-245867-900-08301.000 ppb
2019-04-245867-901-08105.00 ppb
2019-05-155867-900-0845ND
2019-05-155867-901-08153.00 ppb
2019-06-125867-900-09155.00 ppb
2019-06-125867-901-07501.000 ppb
2019-07-105867-901-08022.00 ppb
2019-07-105867-900-08156.00 ppb
2019-08-285867-901-08004.00 ppb
2019-08-285867-900-08254.00 ppb
2019-09-185867-901-07522.00 ppb
2019-09-185867-900-0820ND
2019-10-305867-901-074516.0 ppb
2019-10-305867-900-08251.000 ppb
2019-11-265867-901-07581.000 ppb
2019-11-265867-900-08501.000 ppb
2019-12-305867-901-0800ND
2019-12-305867-900-0820ND