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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Cotuit Fire District 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

 

106

Samples

0

Samples exceeding legal limit (MCL)

42

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
20151.01 ppb4228ND - 4.50 ppb
20160.396 ppb144ND - 1.80 ppb
20170.152 ppb122ND - 0.910 ppb
20180.471 ppb144ND - 1.70 ppb
20190.526 ppb144ND - 2.80 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
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2014-02-18ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-01-05ND
2015-02-111.60 ppb
2015-02-111.60 ppb
2015-02-114.50 ppb
2015-02-114.50 ppb
2015-02-111.000 ppb
2015-02-111.000 ppb
2015-02-111.80 ppb
2015-02-111.80 ppb
2015-05-111.20 ppb
2015-05-111.20 ppb
2015-05-110.820 ppb
2015-05-110.820 ppb
2015-05-111.40 ppb
2015-05-111.40 ppb
2015-05-110.780 ppb
2015-05-110.780 ppb
2015-08-101.90 ppb
2015-08-101.90 ppb
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-08-100.860 ppb
2015-08-100.860 ppb
2015-11-091.30 ppb
2015-11-091.30 ppb
2015-11-090.890 ppb
2015-11-090.890 ppb
2015-11-090.860 ppb
2015-11-090.860 ppb
2015-11-092.20 ppb
2015-11-092.20 ppb
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-08-080.970 ppb
2016-08-080.970 ppb
2016-08-081.80 ppb
2016-08-081.80 ppb
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-02-21ND
2017-08-070.910 ppb
2017-08-070.910 ppb
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-08-061.60 ppb
2018-08-061.60 ppb
2018-08-061.70 ppb
2018-08-061.70 ppb
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-02-22ND
2019-08-132.80 ppb
2019-08-132.80 ppb
2019-08-130.880 ppb
2019-08-130.880 ppb