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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Summerville

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

 

108

Samples

0

Samples exceeding legal limit (MCL)

83

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.26 ppb1813ND - 5.70 ppb
20154.06 ppb1813ND - 8.30 ppb
20163.48 ppb1814ND - 7.20 ppb
20174.39 ppb1815ND - 7.50 ppb
20184.34 ppb1814ND - 9.70 ppb
20194.20 ppb1814ND - 8.20 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
2014-02-18AI28203ND
2014-02-18AI282043.30 ppb
2014-02-18AI282053.40 ppb
2014-02-18AI282064.00 ppb
2014-03-04AI29121ND
2014-03-04AI291223.50 ppb
2014-05-12AI40340ND
2014-05-12AI403415.70 ppb
2014-05-12AI403425.60 ppb
2014-05-12AI403435.40 ppb
2014-08-12AI49435ND
2014-08-12AI494365.00 ppb
2014-08-12AI494374.60 ppb
2014-08-12AI494385.70 ppb
2014-11-12AI594694.80 ppb
2014-11-12AI594704.00 ppb
2014-11-12AI594713.60 ppb
2014-11-12AI59472ND
2015-02-12AI649013.10 ppb
2015-02-12AI64902ND
2015-02-12AI64903ND
2015-02-12AI649044.20 ppb
2015-02-12AI649054.30 ppb
2015-02-12AI649064.20 ppb
2015-05-12AI76962ND
2015-05-12AI769637.30 ppb
2015-05-12AI769646.90 ppb
2015-05-12AI769655.90 ppb
2015-08-11AI859828.00 ppb
2015-08-11AI859838.30 ppb
2015-08-11AI859846.30 ppb
2015-08-11AI85985ND
2015-11-12AJ009755.00 ppb
2015-11-12AJ009764.80 ppb
2015-11-12AJ009774.80 ppb
2015-11-12AJ00978ND
2016-02-11AJ06362ND
2016-02-11AJ063633.10 ppb
2016-02-11AJ063643.40 ppb
2016-02-11AJ063653.30 ppb
2016-02-12AJ063900.850 ppb
2016-02-12AJ063912.90 ppb
2016-05-09AJ117786.20 ppb
2016-05-09AJ117795.20 ppb
2016-05-09AJ117806.10 ppb
2016-05-09AJ11781ND
2016-08-09AJ218027.20 ppb
2016-08-09AJ218036.30 ppb
2016-08-09AJ218046.30 ppb
2016-08-09AJ21805ND
2016-11-08AJ329873.20 ppb
2016-11-08AJ329884.00 ppb
2016-11-08AJ329894.50 ppb
2016-11-08AJ32990ND
2017-02-06AJ45800ND
2017-02-06AJ458015.00 ppb
2017-02-06AJ458024.50 ppb
2017-02-06AJ45803ND
2017-04-04AJ525853.60 ppb
2017-04-04AJ525860.570 ppb
2017-05-09AJ550626.40 ppb
2017-05-09AJ550635.70 ppb
2017-05-09AJ550644.50 ppb
2017-05-09AJ55065ND
2017-08-09AJ635586.20 ppb
2017-08-09AJ635596.40 ppb
2017-08-09AJ635605.10 ppb
2017-08-09AJ635614.80 ppb
2017-11-08AJ734557.50 ppb
2017-11-08AJ734565.70 ppb
2017-11-08AJ734577.30 ppb
2017-11-08AJ734585.70 ppb
2018-01-29AJ780173.90 ppb
2018-01-29AJ78018ND
2018-02-13AJ838024.80 ppb
2018-02-13AJ838033.10 ppb
2018-02-13AJ838044.70 ppb
2018-02-13AJ838051.70 ppb
2018-05-15AJ895105.50 ppb
2018-05-15AJ895116.00 ppb
2018-05-15AJ895125.80 ppb
2018-05-15AJ89513ND
2018-08-08AJ971779.50 ppb
2018-08-08AJ971788.20 ppb
2018-08-08AJ97179ND
2018-08-08AJ971809.70 ppb
2018-11-14AK062316.00 ppb
2018-11-14AK062323.20 ppb
2018-11-14AK062336.00 ppb
2018-11-14AK06234ND
2019-02-12AK11264ND
2019-02-13AK112615.00 ppb
2019-02-13AK112624.20 ppb
2019-02-13AK112636.10 ppb
2019-03-27AK140943.70 ppb
2019-03-27AK140950.540 ppb
2019-05-07AK166706.30 ppb
2019-05-07AK166715.00 ppb
2019-05-07AK166727.00 ppb
2019-05-07AK16673ND
2019-08-13AK259967.10 ppb
2019-08-13AK259976.10 ppb
2019-08-13AK259988.20 ppb
2019-08-13AK25999ND
2019-11-14AK368645.50 ppb
2019-11-14AK368654.90 ppb
2019-11-14AK368666.00 ppb
2019-11-14AK36867ND