Bromide

Sweetwater Authority

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	102.7 ppb	6	2	ND - 362.0 ppb
2015	101.7 ppb	6	2	ND - 307.0 ppb
2016	146.8 ppb	6	4	ND - 315.0 ppb
2017	184.7 ppb	6	4	ND - 358.0 ppb
2018	225.8 ppb	6	6	78.0 ppb - 367.0 ppb
2019	245.3 ppb	3	3	151.0 ppb - 357.0 ppb

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-25	6100-019-0915	362.0 ppb
2014-02-25	6100-007-1110	ND
2014-02-25	6100-005-1115	ND
2014-07-29	6100-019-0915	254.0 ppb
2014-07-29	6100-007-1230	ND
2014-07-29	6100-005-1240	ND
2015-01-27	6100-005-1250	ND
2015-01-27	6100-007-1240	ND
2015-01-27	6100-019-0930	303.0 ppb
2015-08-25	6100-005-0740	ND
2015-08-25	6100-019-1000	307.0 ppb
2015-08-25	6100-007-0750	ND
2016-01-27	6100-007-0735	150.0 ppb
2016-01-27	6100-005-0740	150.0 ppb
2016-01-27	6100-019-1005	315.0 ppb
2016-07-26	6100-007-1300	ND
2016-07-26	6100-005-1255	ND
2016-07-26	6100-019-1040	266.0 ppb
2017-01-31	6100-019-0950	295.0 ppb
2017-01-31	6100-005-1130	ND
2017-01-31	6100-007-1135	ND
2017-10-03	6100-019-0950	300.0 ppb
2017-10-03	6100-005-1130	358.0 ppb
2017-10-03	6100-007-1135	155.0 ppb
2018-01-30	6100-007-0730	162.0 ppb
2018-01-30	6100-019-1030	278.0 ppb
2018-01-30	6100-005-0735	367.0 ppb
2018-11-27	6100-019-1007	286.0 ppb
2018-11-28	6100-007-0745	184.0 ppb
2018-11-28	6100-005-0740	78.0 ppb
2019-03-13	6100-007-1100	228.0 ppb
2019-03-13	6100-005-1100	151.0 ppb
2019-03-13	6100-019-0802	357.0 ppb