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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Los Alamos Municipal Water System

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

 

80

Samples

0

Samples exceeding legal limit (MCL)

64

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
20150.825 ppb2012ND - 2.40 ppb
20161.20 ppb16160.520 ppb - 1.90 ppb
20171.25 ppb12120.720 ppb - 2.20 ppb
20181.25 ppb16160.560 ppb - 2.10 ppb
20190.859 ppb880.560 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
2014-03-051403213-001AND
2014-03-051403210-001AND
2014-03-051403211-001AND
2014-06-101406450-001AND
2014-06-101406447-001AND
2014-06-101406449-001AND
2014-09-241409C06-001AND
2014-09-241409C33-001AND
2015-02-181502747-001AND
2015-02-181502750-001AND
2015-02-181502752-001AND
2015-02-181502748-001AND
2015-03-091503352-001AND
2015-03-091503351-001AND
2015-03-091503354-001AND
2015-03-091503355-001AND
2015-06-0820150169871.40 ppb
2015-06-0820150169881.40 ppb
2015-06-0820150169891.000 ppb
2015-06-0820150169860.980 ppb
2015-09-0820150268682.30 ppb
2015-09-0820150268671.60 ppb
2015-09-0820150268661.90 ppb
2015-09-0820150268652.40 ppb
2015-12-0820150359230.910 ppb
2015-12-0820150359240.900 ppb
2015-12-0820150359210.740 ppb
2015-12-0820150359220.960 ppb
2016-03-0820160066200.780 ppb
2016-03-0820160066180.770 ppb
2016-03-0820160066170.740 ppb
2016-03-0820160066190.580 ppb
2016-06-0620160157771.40 ppb
2016-06-0620160157760.520 ppb
2016-06-0620160157781.30 ppb
2016-06-0620160157791.30 ppb
2016-09-0720160262091.90 ppb
2016-09-0720160262081.80 ppb
2016-09-0720160262071.50 ppb
2016-09-0720160262101.30 ppb
2016-12-0720160350691.20 ppb
2016-12-0720160350671.50 ppb
2016-12-0720160350701.40 ppb
2016-12-0720160350681.20 ppb
2017-03-1520170075380.800 ppb
2017-03-1520170075390.760 ppb
2017-03-1520170075370.720 ppb
2017-03-2420170086210.940 ppb
2017-06-1620170177080.980 ppb
2017-06-1620170177071.10 ppb
2017-06-1620170177091.40 ppb
2017-06-1620170177101.60 ppb
2017-09-1120170261182.20 ppb
2017-09-1120170261201.70 ppb
2017-09-1120170261191.40 ppb
2017-09-1120170261211.40 ppb
2018-03-0720180066970.750 ppb
2018-03-0720180066961.000 ppb
2018-03-0720180066950.950 ppb
2018-03-0720180066940.780 ppb
2018-06-1320180163931.60 ppb
2018-06-1320180163921.80 ppb
2018-06-1320180163911.50 ppb
2018-06-1320180163901.60 ppb
2018-09-1120180254761.90 ppb
2018-09-1120180254771.70 ppb
2018-09-1120180254782.10 ppb
2018-09-1120180254791.30 ppb
2018-12-1220180344060.590 ppb
2018-12-1220180344071.000 ppb
2018-12-1220180344080.940 ppb
2018-12-1220180344090.560 ppb
2019-03-1520190065170.560 ppb
2019-03-1520190065190.730 ppb
2019-03-1520190065180.620 ppb
2019-03-1520190065161.000 ppb
2019-06-1220190162291.10 ppb
2019-06-1220190162280.950 ppb
2019-06-1220190162270.910 ppb
2019-06-1220190162261.000 ppb