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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Tri County Joint Municipal Authority

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)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0894 ppb161ND - 1.43 ppb
20155.85 ppb168ND - 25.5 ppb
20161.97 ppb164ND - 8.69 ppb
20170.125 ppb162ND - 1.000 ppb
20180.0650 ppb161ND - 1.04 ppb
20192.69 ppb168ND - 15.1 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
2014-03-214031900-01ND
2014-03-214031900-02ND
2014-03-214031900-03ND
2014-03-214031900-04ND
2014-06-264062730-02ND
2014-06-264062730-03ND
2014-06-264062730-01ND
2014-06-264062730-04ND
2014-09-184091882-02ND
2014-09-184091882-03ND
2014-09-184091882-04ND
2014-09-184091882-011.43 ppb
2014-12-1914122322-01ND
2014-12-1914122322-03ND
2014-12-1914122322-04ND
2014-12-1914122322-02ND
2015-03-2012579023ND
2015-03-2012579028ND
2015-03-2012579018ND
2015-03-2012579033ND
2015-06-19129568753.48 ppb
2015-06-19129568702.73 ppb
2015-06-19129568652.76 ppb
2015-06-19129568602.99 ppb
2015-09-181333546325.5 ppb
2015-09-181333545317.9 ppb
2015-09-181333545817.0 ppb
2015-09-181333544821.2 ppb
2015-12-1813699343ND
2015-12-1813699333ND
2015-12-1813699348ND
2015-12-1813699338ND
2016-03-1814049544ND
2016-03-1814049536ND
2016-03-1814049547ND
2016-03-1814049541ND
2016-06-1714498830ND
2016-06-1715163050ND
2016-06-1714498835ND
2016-06-2014498845ND
2016-09-30150062777.26 ppb
2016-09-30150062798.69 ppb
2016-09-30150062788.62 ppb
2016-09-30150062766.98 ppb
2016-12-1615453541ND
2016-12-1615453531ND
2016-12-1615453526ND
2016-12-1615453536ND
2017-03-1715873610ND
2017-03-1715873604ND
2017-03-1715873622ND
2017-03-1715873616ND
2017-06-1616348697ND
2017-06-1616348696ND
2017-06-1616348695ND
2017-06-1616348694ND
2017-09-14168145011.000 ppb
2017-09-14168144891.000 ppb
2017-09-1416814495ND
2017-09-1416814507ND
2017-12-1517241095ND
2017-12-1517241107ND
2017-12-1517241089ND
2017-12-1517241101ND
2018-03-2118C1408-01ND
2018-03-2118C1408-03ND
2018-03-2118C1408-02ND
2018-03-2118C1408-041.04 ppb
2018-06-2018F1872-01ND
2018-06-2018F1872-02ND
2018-06-2018F1872-04ND
2018-06-2018F1872-03ND
2018-09-1918I1520-04ND
2018-09-1918I1520-01ND
2018-09-1918I1520-02ND
2018-09-1918I1520-03ND
2018-12-1918L1535-01ND
2018-12-1918L1535-04ND
2018-12-1918L1535-02ND
2018-12-1918L1535-03ND
2019-03-2019C0422-01ND
2019-03-2019C0422-04ND
2019-03-2019C0422-03ND
2019-03-2019C0422-02ND
2019-06-1919F0132-031.11 ppb
2019-06-1919F0132-041.09 ppb
2019-06-1919F0132-021.05 ppb
2019-06-1919F0132-010.885 ppb
2019-09-1819I0750-037.79 ppb
2019-09-1819I0750-0415.1 ppb
2019-09-1819I0750-014.75 ppb
2019-09-1819I0750-0211.2 ppb
2019-12-1919L0304-02ND
2019-12-1919L0304-03ND
2019-12-1919L0304-01ND
2019-12-1919L0304-04ND