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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Bridgewater Water Department

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)

90

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.520 ppb52ND - 1.40 ppb
20155.49 ppb2219ND - 13.8 ppb
20166.12 ppb2118ND - 11.2 ppb
20176.74 ppb2018ND - 18.7 ppb
20187.70 ppb2017ND - 16.9 ppb
20197.09 ppb2016ND - 13.5 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 Result
2014-06-111.40 ppb
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-10-141.20 ppb
2015-01-066.20 ppb
2015-01-067.70 ppb
2015-01-065.90 ppb
2015-01-064.70 ppb
2015-04-066.30 ppb
2015-04-066.30 ppb
2015-04-065.80 ppb
2015-04-085.80 ppb
2015-07-02ND
2015-07-02ND
2015-07-026.80 ppb
2015-07-028.60 ppb
2015-07-028.90 ppb
2015-07-025.80 ppb
2015-07-07ND
2015-07-071.70 ppb
2015-10-0613.8 ppb
2015-10-068.10 ppb
2015-10-065.90 ppb
2015-10-070.700 ppb
2015-10-0711.0 ppb
2015-10-080.800 ppb
2016-01-066.10 ppb
2016-01-067.40 ppb
2016-01-065.40 ppb
2016-01-065.20 ppb
2016-01-123.20 ppb
2016-04-0510.1 ppb
2016-04-0511.2 ppb
2016-04-059.10 ppb
2016-04-057.40 ppb
2016-07-058.20 ppb
2016-07-067.30 ppb
2016-07-065.80 ppb
2016-07-069.90 ppb
2016-07-180.500 ppb
2016-07-18ND
2016-07-19ND
2016-10-04ND
2016-10-046.80 ppb
2016-10-048.60 ppb
2016-10-049.10 ppb
2016-10-047.30 ppb
2017-01-044.60 ppb
2017-01-045.30 ppb
2017-01-049.30 ppb
2017-01-048.20 ppb
2017-04-055.10 ppb
2017-04-058.30 ppb
2017-04-056.20 ppb
2017-04-055.40 ppb
2017-07-065.20 ppb
2017-07-065.60 ppb
2017-07-066.80 ppb
2017-07-064.70 ppb
2017-07-10ND
2017-07-10ND
2017-09-280.800 ppb
2017-10-0216.6 ppb
2017-10-0218.7 ppb
2017-10-0214.2 ppb
2017-10-029.00 ppb
2017-10-130.700 ppb
2018-01-0313.4 ppb
2018-01-0316.9 ppb
2018-01-0315.9 ppb
2018-01-0314.7 ppb
2018-04-037.00 ppb
2018-04-037.00 ppb
2018-04-039.80 ppb
2018-04-036.40 ppb
2018-07-038.60 ppb
2018-07-038.80 ppb
2018-07-038.30 ppb
2018-07-037.20 ppb
2018-07-17ND
2018-07-17ND
2018-07-17ND
2018-10-037.20 ppb
2018-10-039.60 ppb
2018-10-036.70 ppb
2018-10-035.70 ppb
2018-10-250.700 ppb
2019-01-038.00 ppb
2019-01-0310.9 ppb
2019-01-037.00 ppb
2019-01-037.40 ppb
2019-04-036.80 ppb
2019-04-038.80 ppb
2019-04-036.10 ppb
2019-04-035.50 ppb
2019-07-0213.5 ppb
2019-07-029.10 ppb
2019-07-027.40 ppb
2019-07-028.70 ppb
2019-09-23ND
2019-09-23ND
2019-09-23ND
2019-10-0312.9 ppb
2019-10-0313.0 ppb
2019-10-038.00 ppb
2019-10-038.60 ppb
2019-12-18ND