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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Aquarion Water Company of Connecticut - Simsbury 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

 

91

Samples

0

Samples exceeding legal limit (MCL)

31

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.538 ppb165ND - 2.00 ppb
20150.260 ppb154ND - 1.30 ppb
20160.473 ppb155ND - 3.00 ppb
20170.620 ppb156ND - 2.00 ppb
20180.557 ppb145ND - 2.00 ppb
20190.675 ppb166ND - 4.00 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
2014-02-04201401677-VOC1ND
2014-02-07201401908-VOC12.00 ppb
2014-05-07201406328-VOC1ND
2014-05-07201406324-VOC1ND
2014-05-072014427241-VOC12.00 ppb
2014-05-07201406338-VOC1ND
2014-05-07201406333-VOC1ND
2014-05-07201406331-VOC1ND
2014-05-07201406335-VOC1ND
2014-08-08201411392-VOC1ND
2014-08-14201411867-VOC1ND
2014-08-20201412282-DBP2.00 ppb
2014-08-20201412283-DBP2.00 ppb
2014-11-11201417230-VOC10.600 ppb
2014-11-20201417781-VOC1ND
2014-12-04201418312-VOC1ND
2015-02-06201501765-VOC1ND
2015-02-19201502317-VOC11.30 ppb
2015-05-07201505805-VOC1ND
2015-05-07201505815-VOC1ND
2015-05-07201505809-VOC1ND
2015-05-07201505811-VOC1ND
2015-05-07201505813-VOC1ND
2015-05-12201506049-VOC1ND
2015-05-21201506522-VOC1ND
2015-08-05201510663-VOC1ND
2015-08-19201511751-DBP1.000 ppb
2015-08-19201511752-DBP1.000 ppb
2015-08-19201511753-VOC10.600 ppb
2015-11-04201515891-VOC1ND
2015-11-10201516225-VOC1ND
2016-02-03201601684-VOC1ND
2016-02-10201602061-VOC10.700 ppb
2016-05-04201605682-VOC1ND
2016-05-04201605691-VOC1ND
2016-05-04201605686-VOC1ND
2016-05-04201605684-VOC1ND
2016-05-04201605688-VOC1ND
2016-05-04201605678-VOC1ND
2016-05-12201606183-VOC10.800 ppb
2016-08-03201610124-VOC1ND
2016-08-17201610953-VOC1ND
2016-08-17201610952-DBP2.00 ppb
2016-08-17201610951-DBP3.00 ppb
2016-11-04201615626-VOC1ND
2016-11-11201616251-VOC10.600 ppb
2017-02-08201702277-VOC1ND
2017-02-08201702268-VOC1ND
2017-02-08201702280-VOC1ND
2017-02-08201702273-VOC1ND
2017-02-08201702275-VOC1ND
2017-02-16201702710-VOC10.900 ppb
2017-03-08201703617-VOC1ND
2017-05-03201706394-VOC1ND
2017-05-11201706951-VOC10.700 ppb
2017-08-03201711907-VOC1ND
2017-08-17201712932-VOC12.00 ppb
2017-08-21201713183-DBP2.00 ppb
2017-08-21201713182-DBP2.00 ppb
2017-11-02201717254-VOC11.70 ppb
2017-11-09201717694-VOC1ND
2018-02-08201801800-VOC11.000 ppb
2018-02-08201801804-VOC1ND
2018-04-04201804077-VOC1ND
2018-04-04201804071-VOC1ND
2018-04-04201804073-VOC1ND
2018-04-04201804075-VOC1ND
2018-04-04201804080-VOC1ND
2018-05-03201806044-VOC11.30 ppb
2018-05-08201806393-VOC1ND
2018-08-09201812047-VOC1ND
2018-08-22201812877-DBP2.00 ppb
2018-08-22201812878-DBP2.00 ppb
2018-11-07201817345-VOC11.50 ppb
2018-11-07201817335-VOC1ND
2019-02-05201901699-VOC10.800 ppb
2019-02-05201901703-VOC1ND
2019-03-06201902898-VOC1ND
2019-03-06201902905-VOC1ND
2019-03-06201902900-VOC1ND
2019-03-06201902896-VOC1ND
2019-03-06201902902-VOC1ND
2019-03-06201902893-VOC1ND
2019-05-09201906456-VOC11.30 ppb
2019-05-09201906438-VOC1ND
2019-08-07201912408-VOC1ND
2019-08-14201912905-VOC11.20 ppb
2019-08-21201913479-DBP2.00 ppb
2019-08-21201913478-DBP4.00 ppb
2019-11-06201918268-VOC1ND
2019-11-14201918766-VOC11.50 ppb