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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Millis Water Department

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

 

166

Samples

0

Samples exceeding legal limit (MCL)

84

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.363 ppb166ND - 1.30 ppb
20152.59 ppb3022ND - 8.60 ppb
20161.75 ppb2814ND - 7.80 ppb
20170.461 ppb266ND - 4.50 ppb
20181.000 ppb3416ND - 3.10 ppb
20190.963 ppb3220ND - 4.00 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
2014-02-26ND
2014-02-26ND
2014-02-260.730 ppb
2014-02-260.730 ppb
2014-05-28ND
2014-05-28ND
2014-05-28ND
2014-05-28ND
2014-05-28ND
2014-05-28ND
2014-05-28ND
2014-05-28ND
2014-08-280.870 ppb
2014-08-280.870 ppb
2014-11-251.30 ppb
2014-11-251.30 ppb
2015-02-245.40 ppb
2015-02-245.40 ppb
2015-02-242.10 ppb
2015-02-242.10 ppb
2015-02-240.800 ppb
2015-02-240.800 ppb
2015-05-27ND
2015-05-27ND
2015-05-276.00 ppb
2015-05-276.00 ppb
2015-05-27ND
2015-05-27ND
2015-05-270.920 ppb
2015-05-270.920 ppb
2015-05-27ND
2015-05-27ND
2015-05-27ND
2015-05-27ND
2015-08-264.00 ppb
2015-08-264.00 ppb
2015-08-268.60 ppb
2015-08-268.60 ppb
2015-09-291.20 ppb
2015-09-291.20 ppb
2015-11-245.80 ppb
2015-11-245.80 ppb
2015-11-243.10 ppb
2015-11-243.10 ppb
2015-11-241.000 ppb
2015-11-241.000 ppb
2016-02-256.40 ppb
2016-02-256.40 ppb
2016-02-251.90 ppb
2016-02-251.90 ppb
2016-02-250.590 ppb
2016-02-250.590 ppb
2016-06-21ND
2016-06-21ND
2016-06-21ND
2016-06-21ND
2016-06-210.980 ppb
2016-06-210.980 ppb
2016-06-21ND
2016-06-21ND
2016-06-21ND
2016-06-21ND
2016-08-30ND
2016-08-30ND
2016-08-306.00 ppb
2016-08-306.00 ppb
2016-08-30ND
2016-08-30ND
2016-11-21ND
2016-11-21ND
2016-11-217.80 ppb
2016-11-217.80 ppb
2016-11-210.850 ppb
2016-11-210.850 ppb
2017-02-21ND
2017-02-21ND
2017-02-214.50 ppb
2017-02-214.50 ppb
2017-02-210.800 ppb
2017-02-210.800 ppb
2017-03-13ND
2017-03-13ND
2017-06-20ND
2017-06-20ND
2017-06-20ND
2017-06-20ND
2017-07-20ND
2017-07-20ND
2017-09-010.690 ppb
2017-09-010.690 ppb
2017-09-29ND
2017-09-29ND
2017-09-29ND
2017-09-29ND
2017-10-10ND
2017-10-10ND
2017-10-13ND
2017-10-13ND
2017-10-13ND
2017-10-13ND
2018-02-272.60 ppb
2018-02-272.60 ppb
2018-02-272.10 ppb
2018-02-272.10 ppb
2018-02-27ND
2018-02-27ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-291.80 ppb
2018-05-291.80 ppb
2018-05-292.30 ppb
2018-05-292.30 ppb
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-05-29ND
2018-08-292.50 ppb
2018-08-292.50 ppb
2018-08-293.10 ppb
2018-08-293.10 ppb
2018-11-271.20 ppb
2018-11-271.20 ppb
2018-11-271.40 ppb
2018-11-271.40 ppb
2018-12-11ND
2018-12-11ND
2018-12-20ND
2018-12-20ND
2019-02-270.950 ppb
2019-02-270.950 ppb
2019-02-271.000 ppb
2019-02-271.000 ppb
2019-02-270.900 ppb
2019-02-270.900 ppb
2019-05-30ND
2019-05-30ND
2019-05-30ND
2019-05-30ND
2019-05-300.940 ppb
2019-05-300.940 ppb
2019-05-301.72 ppb
2019-05-301.72 ppb
2019-05-30ND
2019-05-30ND
2019-05-30ND
2019-05-30ND
2019-05-30ND
2019-05-30ND
2019-08-281.78 ppb
2019-08-281.78 ppb
2019-08-284.00 ppb
2019-08-284.00 ppb
2019-08-281.27 ppb
2019-08-281.27 ppb
2019-11-261.66 ppb
2019-11-261.66 ppb
2019-11-261.19 ppb
2019-11-261.19 ppb
2019-12-18ND
2019-12-18ND