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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Canton Water Department (MWRA)

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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

 

218

Samples

0

Samples exceeding legal limit (MCL)

122

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.980 ppb108ND - 1.60 ppb
20150.500 ppb4222ND - 1.70 ppb
20160.719 ppb4228ND - 2.40 ppb
20170.938 ppb4236ND - 3.10 ppb
20180.670 ppb4018ND - 3.00 ppb
20190.600 ppb4222ND - 2.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-01-14ND
2014-01-14ND
2014-01-140.700 ppb
2014-01-140.700 ppb
2014-04-231.60 ppb
2014-04-231.60 ppb
2014-08-271.40 ppb
2014-08-271.40 ppb
2014-10-231.20 ppb
2014-10-231.20 ppb
2015-01-220.600 ppb
2015-01-220.600 ppb
2015-01-22ND
2015-01-22ND
2015-01-22ND
2015-01-22ND
2015-01-22ND
2015-01-22ND
2015-02-040.800 ppb
2015-02-040.800 ppb
2015-02-041.30 ppb
2015-02-041.30 ppb
2015-04-211.70 ppb
2015-04-211.70 ppb
2015-04-211.60 ppb
2015-04-211.60 ppb
2015-04-21ND
2015-04-21ND
2015-04-21ND
2015-04-21ND
2015-05-210.900 ppb
2015-05-210.900 ppb
2015-07-210.700 ppb
2015-07-210.700 ppb
2015-07-21ND
2015-07-21ND
2015-07-21ND
2015-07-21ND
2015-07-21ND
2015-07-21ND
2015-08-181.000 ppb
2015-08-181.000 ppb
2015-10-220.600 ppb
2015-10-220.600 ppb
2015-10-22ND
2015-10-22ND
2015-10-220.800 ppb
2015-10-220.800 ppb
2015-10-220.500 ppb
2015-10-220.500 ppb
2015-12-09ND
2015-12-09ND
2016-01-19ND
2016-01-19ND
2016-01-190.600 ppb
2016-01-190.600 ppb
2016-01-190.600 ppb
2016-01-190.600 ppb
2016-01-191.000 ppb
2016-01-191.000 ppb
2016-01-19ND
2016-01-19ND
2016-01-190.700 ppb
2016-01-190.700 ppb
2016-04-191.40 ppb
2016-04-191.40 ppb
2016-04-191.10 ppb
2016-04-191.10 ppb
2016-04-191.50 ppb
2016-04-191.50 ppb
2016-04-190.800 ppb
2016-04-190.800 ppb
2016-04-191.20 ppb
2016-04-191.20 ppb
2016-07-200.500 ppb
2016-07-200.500 ppb
2016-07-20ND
2016-07-20ND
2016-07-20ND
2016-07-20ND
2016-07-20ND
2016-07-20ND
2016-08-252.40 ppb
2016-08-252.40 ppb
2016-10-171.40 ppb
2016-10-171.40 ppb
2016-10-170.500 ppb
2016-10-170.500 ppb
2016-10-17ND
2016-10-17ND
2016-10-17ND
2016-10-17ND
2016-10-171.40 ppb
2016-10-171.40 ppb
2017-01-191.10 ppb
2017-01-191.10 ppb
2017-01-190.700 ppb
2017-01-190.700 ppb
2017-01-193.10 ppb
2017-01-193.10 ppb
2017-01-190.600 ppb
2017-01-190.600 ppb
2017-02-270.700 ppb
2017-02-270.700 ppb
2017-02-271.50 ppb
2017-02-271.50 ppb
2017-04-181.10 ppb
2017-04-181.10 ppb
2017-04-180.500 ppb
2017-04-180.500 ppb
2017-04-181.20 ppb
2017-04-181.20 ppb
2017-04-18ND
2017-04-18ND
2017-06-280.500 ppb
2017-06-280.500 ppb
2017-07-170.600 ppb
2017-07-170.600 ppb
2017-07-17ND
2017-07-17ND
2017-07-170.800 ppb
2017-07-170.800 ppb
2017-07-170.800 ppb
2017-07-170.800 ppb
2017-08-301.90 ppb
2017-08-301.90 ppb
2017-10-160.600 ppb
2017-10-160.600 ppb
2017-10-16ND
2017-10-16ND
2017-10-161.40 ppb
2017-10-161.40 ppb
2017-10-160.600 ppb
2017-10-160.600 ppb
2017-11-142.00 ppb
2017-11-142.00 ppb
2018-01-18ND
2018-01-18ND
2018-01-18ND
2018-01-18ND
2018-01-181.50 ppb
2018-01-181.50 ppb
2018-01-180.700 ppb
2018-01-180.700 ppb
2018-03-093.00 ppb
2018-03-093.00 ppb
2018-03-092.90 ppb
2018-03-092.90 ppb
2018-04-190.800 ppb
2018-04-190.800 ppb
2018-04-191.50 ppb
2018-04-191.50 ppb
2018-04-190.700 ppb
2018-04-190.700 ppb
2018-04-19ND
2018-04-19ND
2018-06-13ND
2018-06-13ND
2018-07-160.900 ppb
2018-07-160.900 ppb
2018-07-16ND
2018-07-16ND
2018-07-16ND
2018-07-16ND
2018-07-16ND
2018-07-16ND
2018-09-07ND
2018-09-07ND
2018-10-18ND
2018-10-18ND
2018-10-18ND
2018-10-18ND
2018-10-18ND
2018-10-18ND
2018-10-181.40 ppb
2018-10-181.40 ppb
2019-01-18ND
2019-01-18ND
2019-01-18ND
2019-01-18ND
2019-01-180.700 ppb
2019-01-180.700 ppb
2019-01-18ND
2019-01-18ND
2019-03-06ND
2019-03-06ND
2019-03-06ND
2019-03-06ND
2019-04-08ND
2019-04-08ND
2019-04-08ND
2019-04-08ND
2019-04-080.500 ppb
2019-04-080.500 ppb
2019-04-080.600 ppb
2019-04-080.600 ppb
2019-04-25ND
2019-04-25ND
2019-07-082.70 ppb
2019-07-082.70 ppb
2019-07-152.30 ppb
2019-07-152.30 ppb
2019-07-151.80 ppb
2019-07-151.80 ppb
2019-07-15ND
2019-07-15ND
2019-07-150.700 ppb
2019-07-150.700 ppb
2019-10-100.800 ppb
2019-10-100.800 ppb
2019-10-10ND
2019-10-10ND
2019-10-100.800 ppb
2019-10-100.800 ppb
2019-10-100.800 ppb
2019-10-100.800 ppb
2019-10-230.900 ppb
2019-10-230.900 ppb