Bromide

Danvers Water Department

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	N/A	0	0	N/A
2015	25.4 ppb	11	11	20.0 ppb - 32.0 ppb
2016	29.0 ppb	13	13	23.0 ppb - 34.0 ppb
2017	30.9 ppb	11	11	26.0 ppb - 36.0 ppb
2018	31.5 ppb	12	12	25.0 ppb - 39.0 ppb
2019	28.0 ppb	11	11	23.0 ppb - 36.0 ppb

ppb = parts per billion

All test results

Date	Result
2015-02-05	30.0 ppb
2015-03-03	32.0 ppb
2015-04-06	23.0 ppb
2015-05-07	21.0 ppb
2015-06-02	25.0 ppb
2015-07-20	27.0 ppb
2015-08-10	29.0 ppb
2015-09-14	20.0 ppb
2015-10-07	22.0 ppb
2015-11-04	24.0 ppb
2015-12-02	26.0 ppb
2016-01-06	25.0 ppb
2016-02-09	26.0 ppb
2016-03-02	27.0 ppb
2016-04-04	23.0 ppb
2016-05-02	26.0 ppb
2016-06-01	25.0 ppb
2016-07-11	31.0 ppb
2016-08-01	30.0 ppb
2016-09-07	32.0 ppb
2016-10-03	33.0 ppb
2016-10-03	34.0 ppb
2016-11-08	33.0 ppb
2016-12-06	32.0 ppb
2017-01-05	36.0 ppb
2017-02-01	32.0 ppb
2017-03-06	30.0 ppb
2017-05-01	26.0 ppb
2017-06-13	26.0 ppb
2017-07-11	26.0 ppb
2017-08-14	30.0 ppb
2017-09-11	30.0 ppb
2017-10-10	35.0 ppb
2017-11-08	33.0 ppb
2017-12-11	36.0 ppb
2018-01-08	37.0 ppb
2018-02-12	39.0 ppb
2018-03-06	37.0 ppb
2018-04-09	29.0 ppb
2018-05-08	26.0 ppb
2018-06-11	25.0 ppb
2018-07-18	28.0 ppb
2018-08-13	34.0 ppb
2018-09-10	34.0 ppb
2018-10-15	30.0 ppb
2018-11-06	30.0 ppb
2018-12-04	29.0 ppb
2019-01-08	29.0 ppb
2019-02-11	27.0 ppb
2019-03-11	32.0 ppb
2019-04-08	26.0 ppb
2019-05-06	23.0 ppb
2019-06-11	24.0 ppb
2019-07-08	27.0 ppb
2019-08-07	25.0 ppb
2019-09-09	28.0 ppb
2019-10-10	31.0 ppb
2019-11-05	36.0 ppb