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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Skagit County Public Utility District 1 Judy Reservoir

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

 

195

Samples

0

Samples exceeding legal limit (MCL)

195

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.27 ppb32320.500 ppb - 2.50 ppb
20151.67 ppb33331.20 ppb - 2.20 ppb
20161.56 ppb33330.700 ppb - 2.30 ppb
20170.867 ppb33330.600 ppb - 1.10 ppb
20180.834 ppb32320.600 ppb - 1.10 ppb
20190.803 ppb32320.500 ppb - 1.10 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
2014-01-27025730.800 ppb
2014-01-27025720.500 ppb
2014-01-27025700.600 ppb
2014-01-27025710.700 ppb
2014-01-28025750.800 ppb
2014-01-28025740.700 ppb
2014-01-28025770.500 ppb
2014-01-28025760.700 ppb
2014-04-28118972.30 ppb
2014-04-28118952.50 ppb
2014-04-28118962.10 ppb
2014-04-28118982.40 ppb
2014-04-29119001.20 ppb
2014-04-29118992.40 ppb
2014-04-29119021.80 ppb
2014-04-29119012.30 ppb
2014-07-28236301.50 ppb
2014-07-28236311.20 ppb
2014-07-28236361.40 ppb
2014-07-28236291.10 ppb
2014-07-28236351.20 ppb
2014-07-28236321.50 ppb
2014-07-28236331.40 ppb
2014-07-28236341.10 ppb
2014-10-27744580.900 ppb
2014-10-27744561.000 ppb
2014-10-27744591.000 ppb
2014-10-27744571.000 ppb
2014-10-28744601.10 ppb
2014-10-28744611.000 ppb
2014-10-28744621.000 ppb
2014-10-28744630.900 ppb
2015-01-26036911.50 ppb
2015-01-26036901.40 ppb
2015-01-26036891.50 ppb
2015-01-27038891.40 ppb
2015-01-27038901.20 ppb
2015-01-27038871.20 ppb
2015-01-27038911.20 ppb
2015-01-27038881.50 ppb
2015-04-27183491.60 ppb
2015-04-27183461.70 ppb
2015-04-27183481.30 ppb
2015-04-27183511.50 ppb
2015-04-27183501.70 ppb
2015-04-28183531.80 ppb
2015-04-28183521.40 ppb
2015-04-28183541.50 ppb
2015-04-28183471.70 ppb
2015-07-27342961.90 ppb
2015-07-27342942.10 ppb
2015-07-27342951.80 ppb
2015-07-27342932.10 ppb
2015-07-28343002.10 ppb
2015-07-28342982.20 ppb
2015-07-28342992.10 ppb
2015-07-28342972.20 ppb
2015-10-26512541.90 ppb
2015-10-26512531.70 ppb
2015-10-26512521.90 ppb
2015-10-27514811.50 ppb
2015-10-27514822.00 ppb
2015-10-27514801.30 ppb
2015-10-27514831.70 ppb
2015-10-27514791.40 ppb
2016-01-261.40 ppb
2016-01-261.60 ppb
2016-01-261.70 ppb
2016-01-261.70 ppb
2016-01-261.50 ppb
2016-01-271.70 ppb
2016-01-271.70 ppb
2016-01-271.60 ppb
2016-04-251.70 ppb
2016-04-251.80 ppb
2016-04-251.80 ppb
2016-04-251.20 ppb
2016-04-261.80 ppb
2016-04-261.70 ppb
2016-04-261.60 ppb
2016-04-261.60 ppb
2016-04-261.70 ppb
2016-07-252.20 ppb
2016-07-252.10 ppb
2016-07-252.30 ppb
2016-07-262.20 ppb
2016-07-262.00 ppb
2016-07-261.90 ppb
2016-07-262.30 ppb
2016-07-262.20 ppb
2016-10-240.800 ppb
2016-10-240.800 ppb
2016-10-240.900 ppb
2016-10-250.800 ppb
2016-10-250.800 ppb
2016-10-250.900 ppb
2016-10-250.700 ppb
2016-10-250.800 ppb
2017-01-230.900 ppb
2017-01-230.800 ppb
2017-01-230.700 ppb
2017-01-240.800 ppb
2017-01-240.800 ppb
2017-01-240.800 ppb
2017-01-240.700 ppb
2017-01-240.800 ppb
2017-04-241.000 ppb
2017-04-241.000 ppb
2017-04-241.000 ppb
2017-04-241.000 ppb
2017-04-241.000 ppb
2017-04-240.900 ppb
2017-04-251.000 ppb
2017-04-251.000 ppb
2017-07-241.000 ppb
2017-07-241.000 ppb
2017-07-241.10 ppb
2017-07-240.900 ppb
2017-07-251.000 ppb
2017-07-251.000 ppb
2017-07-251.000 ppb
2017-07-251.000 ppb
2017-08-091.10 ppb
2017-10-230.600 ppb
2017-10-230.700 ppb
2017-10-230.600 ppb
2017-10-230.700 ppb
2017-10-250.700 ppb
2017-10-250.700 ppb
2017-10-250.600 ppb
2017-10-250.700 ppb
2018-01-290.800 ppb
2018-01-290.900 ppb
2018-01-290.800 ppb
2018-01-290.900 ppb
2018-01-301.000 ppb
2018-01-300.800 ppb
2018-01-300.700 ppb
2018-01-300.900 ppb
2018-04-230.900 ppb
2018-04-230.800 ppb
2018-04-230.900 ppb
2018-04-230.700 ppb
2018-04-230.800 ppb
2018-04-240.800 ppb
2018-04-241.000 ppb
2018-04-240.900 ppb
2018-07-231.10 ppb
2018-07-231.000 ppb
2018-07-231.000 ppb
2018-07-231.000 ppb
2018-07-241.10 ppb
2018-07-241.000 ppb
2018-07-241.000 ppb
2018-07-241.000 ppb
2018-10-220.700 ppb
2018-10-220.600 ppb
2018-10-220.600 ppb
2018-10-220.600 ppb
2018-10-220.600 ppb
2018-10-220.600 ppb
2018-10-220.600 ppb
2018-10-220.600 ppb
2019-01-280.800 ppb
2019-01-280.700 ppb
2019-01-280.800 ppb
2019-01-280.800 ppb
2019-01-290.800 ppb
2019-01-290.900 ppb
2019-01-290.800 ppb
2019-01-290.800 ppb
2019-04-251.10 ppb
2019-04-251.000 ppb
2019-04-251.000 ppb
2019-04-251.10 ppb
2019-04-251.000 ppb
2019-04-291.10 ppb
2019-04-301.000 ppb
2019-04-301.10 ppb
2019-07-290.800 ppb
2019-07-290.800 ppb
2019-07-290.800 ppb
2019-07-290.800 ppb
2019-07-300.800 ppb
2019-07-300.800 ppb
2019-07-300.800 ppb
2019-07-310.800 ppb
2019-10-280.500 ppb
2019-10-280.500 ppb
2019-10-280.500 ppb
2019-10-280.700 ppb
2019-10-280.700 ppb
2019-10-280.500 ppb
2019-10-280.500 ppb
2019-10-280.600 ppb