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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Magna Water District

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.

 

101

Samples

0

Samples exceeding legal limit (MCL)

94

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20125.44 ppb12122.31 ppb - 14.8 ppb
20133.77 ppb1614ND - 10.8 ppb
20144.82 ppb1615ND - 15.7 ppb
20153.34 ppb1614ND - 10.2 ppb
20163.79 ppb1817ND - 23.6 ppb
20176.12 ppb23231.30 ppb - 26.4 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
2012-05-292.56 ppb
2012-05-294.04 ppb
2012-05-297.42 ppb
2012-05-293.25 ppb
2012-08-2814.8 ppb
2012-08-282.31 ppb
2012-08-283.95 ppb
2012-08-282.80 ppb
2012-11-2611.8 ppb
2012-11-264.10 ppb
2012-11-263.90 ppb
2012-11-264.30 ppb
2013-02-26ND
2013-02-26ND
2013-02-262.12 ppb
2013-02-264.87 ppb
2013-05-282.63 ppb
2013-05-282.98 ppb
2013-05-283.58 ppb
2013-05-283.91 ppb
2013-08-262.36 ppb
2013-08-262.76 ppb
2013-08-268.58 ppb
2013-08-265.56 ppb
2013-11-2510.8 ppb
2013-11-251.02 ppb
2013-11-255.71 ppb
2013-11-253.46 ppb
2014-02-250.815 ppb
2014-02-250.774 ppb
2014-02-254.85 ppb
2014-02-256.37 ppb
2014-05-203.24 ppb
2014-05-20ND
2014-05-204.81 ppb
2014-05-204.68 ppb
2014-08-253.40 ppb
2014-08-252.78 ppb
2014-08-253.47 ppb
2014-08-2515.7 ppb
2014-11-1810.8 ppb
2014-11-181.66 ppb
2014-11-1810.5 ppb
2014-11-183.26 ppb
2015-02-237.04 ppb
2015-02-243.23 ppb
2015-02-240.676 ppb
2015-02-242.75 ppb
2015-05-263.29 ppb
2015-05-263.35 ppb
2015-05-261.31 ppb
2015-05-2610.2 ppb
2015-08-263.26 ppb
2015-08-262.99 ppb
2015-08-263.99 ppb
2015-08-263.28 ppb
2015-11-23ND
2015-11-23ND
2015-11-234.20 ppb
2015-11-233.80 ppb
2016-01-26ND
2016-02-233.00 ppb
2016-02-230.500 ppb
2016-02-232.50 ppb
2016-02-231.40 ppb
2016-05-313.40 ppb
2016-05-313.00 ppb
2016-05-312.40 ppb
2016-05-312.60 ppb
2016-08-021.90 ppb
2016-08-232.77 ppb
2016-08-232.46 ppb
2016-08-232.51 ppb
2016-08-232.57 ppb
2016-11-2123.6 ppb
2016-11-210.710 ppb
2016-11-219.29 ppb
2016-11-213.53 ppb
2017-02-161.30 ppb
2017-02-2219.1 ppb
2017-02-221.88 ppb
2017-02-225.40 ppb
2017-02-223.36 ppb
2017-02-271.80 ppb
2017-05-102.30 ppb
2017-05-107.50 ppb
2017-05-2214.5 ppb
2017-05-228.25 ppb
2017-05-225.56 ppb
2017-05-223.34 ppb
2017-07-111.50 ppb
2017-08-071.50 ppb
2017-08-073.80 ppb
2017-08-213.59 ppb
2017-08-213.07 ppb
2017-08-212.89 ppb
2017-08-216.75 ppb
2017-11-2026.4 ppb
2017-11-2011.0 ppb
2017-11-203.27 ppb
2017-11-202.78 ppb