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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Woodstock

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

 

121

Samples

0

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20148.42 ppb16165.20 ppb - 11.0 ppb
20158.93 ppb16166.10 ppb - 11.0 ppb
20168.14 ppb16163.10 ppb - 11.0 ppb
20179.43 ppb16165.90 ppb - 12.0 ppb
20182.90 ppb3116ND - 9.70 ppb
20193.94 ppb2616ND - 9.30 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
2014-01-13AI262726.50 ppb
2014-01-13AI262736.20 ppb
2014-01-13AI262745.20 ppb
2014-01-13AI262756.40 ppb
2014-04-08AI372688.20 ppb
2014-04-08AI372697.30 ppb
2014-04-08AI372707.50 ppb
2014-04-08AI372717.20 ppb
2014-07-10AI4542311.0 ppb
2014-07-10AI454249.70 ppb
2014-07-10AI454259.80 ppb
2014-07-10AI454269.60 ppb
2014-10-06AI566739.90 ppb
2014-10-06AI566749.90 ppb
2014-10-06AI5667511.0 ppb
2014-10-06AI566769.30 ppb
2015-01-22AI632526.10 ppb
2015-01-22AI632536.70 ppb
2015-01-22AI632546.10 ppb
2015-01-22AI632559.80 ppb
2015-04-09AI7450010.00 ppb
2015-04-09AI745019.80 ppb
2015-04-09AI7450210.00 ppb
2015-04-09AI745038.90 ppb
2015-07-08AI820748.40 ppb
2015-07-08AI820759.50 ppb
2015-07-08AI8207611.0 ppb
2015-07-08AI8207710.00 ppb
2015-10-26AI9975011.0 ppb
2015-10-26AI997517.70 ppb
2015-10-26AI997529.00 ppb
2015-10-26AI997538.80 ppb
2016-01-12AJ039446.10 ppb
2016-01-12AJ039453.10 ppb
2016-01-12AJ039467.40 ppb
2016-01-12AJ039476.20 ppb
2016-04-12AJ098417.90 ppb
2016-04-12AJ098425.50 ppb
2016-04-12AJ098438.30 ppb
2016-04-12AJ098446.90 ppb
2016-07-12AJ171259.20 ppb
2016-07-12AJ171269.70 ppb
2016-07-12AJ171279.10 ppb
2016-07-12AJ1712810.00 ppb
2016-10-10AJ3099510.00 ppb
2016-10-10AJ3099610.00 ppb
2016-10-10AJ309979.90 ppb
2016-10-10AJ3099811.0 ppb
2017-01-11AJ379117.10 ppb
2017-01-11AJ379126.20 ppb
2017-01-11AJ379136.80 ppb
2017-01-11AJ379145.90 ppb
2017-04-10AJ5284210.00 ppb
2017-04-10AJ528438.80 ppb
2017-04-10AJ528449.20 ppb
2017-04-10AJ5284512.0 ppb
2017-07-12AJ5996912.0 ppb
2017-07-12AJ5997011.0 ppb
2017-07-12AJ5997112.0 ppb
2017-07-12AJ5997211.0 ppb
2017-10-12AJ7153810.00 ppb
2017-10-12AJ7153910.00 ppb
2017-10-12AJ715409.60 ppb
2017-10-12AJ715419.20 ppb
2018-01-09AJ761903.10 ppb
2018-01-09AJ761915.20 ppb
2018-01-09AJ761925.60 ppb
2018-01-09AJ761932.30 ppb
2018-04-09AJ869875.00 ppb
2018-04-09AJ869886.30 ppb
2018-04-09AJ869897.70 ppb
2018-04-09AJ869903.90 ppb
2018-04-10AJ87086ND
2018-04-10AJ87087ND
2018-04-10AJ87088ND
2018-04-10AJ87089ND
2018-04-10AJ87090ND
2018-07-09AJ932026.60 ppb
2018-07-09AJ932037.80 ppb
2018-07-09AJ932049.70 ppb
2018-07-09AJ932056.70 ppb
2018-07-10AJ93442ND
2018-07-10AJ93443ND
2018-07-10AJ93444ND
2018-07-10AJ93445ND
2018-07-10AJ93446ND
2018-12-18AK08329ND
2018-12-18AK08330ND
2018-12-18AK08331ND
2018-12-18AK08332ND
2018-12-18AK08333ND
2018-12-18AK083393.80 ppb
2018-12-18AK083405.70 ppb
2018-12-18AK083416.40 ppb
2018-12-18AK083424.20 ppb
2019-01-08AK090233.70 ppb
2019-01-08AK090244.20 ppb
2019-01-08AK090256.10 ppb
2019-01-08AK090262.40 ppb
2019-01-08AK09027ND
2019-01-08AK09028ND
2019-01-08AK09029ND
2019-01-08AK09030ND
2019-01-08AK09031ND
2019-04-08AK147015.90 ppb
2019-04-08AK147025.00 ppb
2019-04-08AK147038.20 ppb
2019-04-08AK147043.20 ppb
2019-04-15AK15169ND
2019-04-15AK15170ND
2019-04-15AK15171ND
2019-04-15AK15172ND
2019-04-15AK15173ND
2019-07-10AK218638.10 ppb
2019-07-10AK218647.40 ppb
2019-07-10AK218659.20 ppb
2019-07-10AK218669.30 ppb
2019-10-08AK344807.50 ppb
2019-10-08AK344817.30 ppb
2019-10-08AK344829.20 ppb
2019-10-08AK344835.80 ppb