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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Schofield Waterworks

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)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.04 ppb550.460 ppb - 1.50 ppb
20150.937 ppb660.660 ppb - 1.30 ppb
20160.750 ppb660.410 ppb - 1.20 ppb
20171.47 ppb440.620 ppb - 2.40 ppb
20181.00 ppb550.380 ppb - 1.50 ppb
20190.900 ppb330.460 ppb - 1.50 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
2014-02-107696700.720 ppb
2014-04-247825141.000 ppb
2014-07-168035220.460 ppb
2014-08-138105101.50 ppb
2014-08-138105091.50 ppb
2015-03-038461540.980 ppb
2015-04-208551680.840 ppb
2015-07-078693360.740 ppb
2015-08-108759800.660 ppb
2015-08-108759811.30 ppb
2015-12-078971301.10 ppb
2016-02-099046650.640 ppb
2016-02-099046670.770 ppb
2016-04-059137800.580 ppb
2016-08-109384880.410 ppb
2016-08-109384891.20 ppb
2016-10-129530760.900 ppb
2017-06-209990420.620 ppb
2017-09-0610162152.00 ppb
2017-09-0610162142.40 ppb
2017-11-0710283890.870 ppb
2018-08-1510742121.30 ppb
2018-08-2010748971.50 ppb
2018-08-2810765750.380 ppb
2018-08-2810765760.740 ppb
2018-08-2810765741.10 ppb
2019-08-1911419850.740 ppb
2019-08-2211430431.50 ppb
2019-09-1611480860.460 ppb