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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Garrison Lake Pump 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.

MORE ABOUT THIS CONTAMINANT

 

29

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.293 ppb83ND - 0.980 ppb
20150.0786 ppb71ND - 0.550 ppb
2016ND30ND
2017ND50ND
20180.165 ppb41ND - 0.660 ppb
20190.335 ppb21ND - 0.670 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
2014-04-08S479130ND
2014-04-08S4790580.660 ppb
2014-04-08S479056ND
2014-04-22S479066ND
2014-07-23L5171338-2ND
2014-08-25S4792270.700 ppb
2014-08-25S4792260.980 ppb
2014-10-20S481390ND
2015-01-27S580495ND
2015-04-20S588770ND
2015-05-27S612402ND
2015-07-30S6019920.550 ppb
2015-08-14S614601ND
2015-08-14S614600ND
2015-10-19S602058ND
2016-04-01S659035ND
2016-08-11S670371ND
2016-08-11S670370ND
2017-04-07S614679ND
2017-04-07S614591ND
2017-04-07S614590ND
2017-08-18S737017ND
2017-08-18S730917ND
2018-04-13S770746ND
2018-04-18S769424ND
2018-08-10S812101ND
2018-08-10S8120970.660 ppb
2019-08-06S865052ND
2019-08-06S8651360.670 ppb