Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

Algonquin

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

42

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.225 ppb166ND - 0.745 ppb
20150.914 ppb167ND - 4.46 ppb
20160.339 ppb168ND - 1.04 ppb
20170.642 ppb164ND - 2.64 ppb
20180.360 ppb167ND - 1.15 ppb
20190.590 ppb1610ND - 2.61 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 Lab ID Result
2014-01-084010839-01ND
2014-01-084010839-02ND
2014-01-084010839-03ND
2014-01-084010839-04ND
2014-04-074041948-01ND
2014-04-074041948-020.506 ppb
2014-04-074041948-03ND
2014-04-074041948-040.591 ppb
2014-07-094071807-01ND
2014-07-094071807-020.745 ppb
2014-07-094071807-03ND
2014-07-094071807-040.655 ppb
2014-10-074101792-03ND
2014-10-074101792-040.524 ppb
2014-10-074101792-020.585 ppb
2014-10-074101792-01ND
2015-01-085012085-01ND
2015-01-085012085-040.654 ppb
2015-01-085012085-02ND
2015-01-085012085-03ND
2015-04-065041678-01ND
2015-04-065041678-044.46 ppb
2015-04-065041678-03ND
2015-04-065041678-024.44 ppb
2015-07-075071681-021.96 ppb
2015-07-075071681-03ND
2015-07-075071681-01ND
2015-07-075071681-041.98 ppb
2015-10-065101397-02ND
2015-10-065101397-03ND
2015-10-065101397-010.519 ppb
2015-10-065101397-040.623 ppb
2016-01-276013757-04ND
2016-01-276013757-03ND
2016-01-276013757-02ND
2016-01-276013757-01ND
2016-04-056041278-020.563 ppb
2016-04-056041278-040.536 ppb
2016-04-056041278-01ND
2016-04-056041278-03ND
2016-07-066071115-040.642 ppb
2016-07-066071115-010.659 ppb
2016-07-066071115-020.578 ppb
2016-07-066071115-03ND
2016-10-056101158-01ND
2016-10-056101158-041.04 ppb
2016-10-056101158-020.879 ppb
2016-10-056101158-030.527 ppb
2017-01-047010739-01ND
2017-01-047010739-04ND
2017-01-047010739-03ND
2017-01-047010739-02ND
2017-04-037041074-03ND
2017-04-037041074-04ND
2017-04-037041074-01ND
2017-04-037041074-02ND
2017-07-057070235-022.62 ppb
2017-07-057070235-042.64 ppb
2017-07-057070235-012.49 ppb
2017-07-057070235-032.52 ppb
2017-10-027100103-01ND
2017-10-027100103-03ND
2017-10-027100103-02ND
2017-10-027100103-04ND
2018-01-038010237-04ND
2018-01-038010237-03ND
2018-01-038010237-020.691 ppb
2018-01-038010237-010.717 ppb
2018-04-048040803-04ND
2018-04-048040803-01ND
2018-04-048040803-02ND
2018-04-048040803-03ND
2018-07-038070408-040.867 ppb
2018-07-038070408-03ND
2018-07-038070408-020.745 ppb
2018-07-038070408-010.791 ppb
2018-10-038100924-01ND
2018-10-038100924-020.806 ppb
2018-10-038100924-03ND
2018-10-038100924-041.15 ppb
2019-01-089011130-01ND
2019-01-089011130-02ND
2019-01-089011130-03ND
2019-01-089011130-040.512 ppb
2019-04-039040917-010.525 ppb
2019-04-039040917-04ND
2019-04-039040917-03ND
2019-04-039040917-020.764 ppb
2019-07-109071820-020.867 ppb
2019-07-109071820-040.718 ppb
2019-07-109071820-03ND
2019-07-109071820-010.536 ppb
2019-10-099102133-041.55 ppb
2019-10-099102133-030.683 ppb
2019-10-099102133-022.61 ppb
2019-10-099102133-010.668 ppb