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EWG's Tap Water Database — 2019 UPDATE

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Bromide

San Francisco Regional Water System

Bromide is a naturally occurring element found in surface waters and groundwater. During drinking water treatment, bromide can combine with chlorine or other disinfectants, contributing to the formation of toxic tap water disinfection byproducts.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND10ND
2014ND30ND
2015ND30ND
201614.0 ppb2214.0 ppb
201713.0 ppb32ND - 24.0 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2013-10-079590-015-1024ND
2014-06-179553-016-0904ND
2014-06-179553-001-1130ND
2014-09-169553-015-1035ND
2015-05-279553-001-1235ND
2015-05-279553-016-0830ND
2015-06-189553-015-0915ND
2016-06-219590-016-105514.0 ppb
2016-07-059590-016-092014.0 ppb
2017-06-199590-016-095324.0 ppb
2017-06-199590-015-110015.0 ppb
2017-06-199590-001-1025ND