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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Tempe Water Supply Corporation 1

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.95 ppb21ND - 3.90 ppb
20131.02 ppb63ND - 2.60 ppb
20141.18 ppb42ND - 3.00 ppb
20151.01 ppb74ND - 2.50 ppb
20161.02 ppb53ND - 2.50 ppb
20171.02 ppb53ND - 2.90 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
2012-02-29AB823303.90 ppb
2012-02-29AB82328ND
2013-02-26AC115692.60 ppb
2013-02-26AC11571ND
2013-06-14AC222132.00 ppb
2013-06-14AC22216ND
2013-06-14AC222261.50 ppb
2013-06-14AC22227ND
2014-01-15AC389923.00 ppb
2014-01-15AC38994ND
2014-01-15AC39002ND
2014-06-23AC576371.70 ppb
2015-02-24AC817131.60 ppb
2015-02-24AC816991.10 ppb
2015-02-24AC81709ND
2015-02-24AC81697ND
2015-06-02AC94111ND
2015-09-10AD065721.90 ppb
2015-12-03AD154562.50 ppb
2016-02-25AD257952.50 ppb
2016-02-25AD25791ND
2016-02-25AD257831.000 ppb
2016-02-25AD257851.60 ppb
2016-06-07AD39608ND
2017-06-01AD86365ND
2017-06-01AD864321.20 ppb
2017-06-01AD864122.90 ppb
2017-06-01AD86408ND
2017-06-01AD864261.000 ppb