Bromate in Drinking Water

In keeping with federal and state requirements, Concord tests its drinking water for all regulated substances.  One of these substances, bromate, is regulated with a “maximum contaminant level” (MCL) of 10 parts per billion (10 ppb), averaged over any 12-month period. The average of the samples of drinking water supplied from Nagog Pond during the months of June to September 2019 was just less than 11 ppb, and because of this, we sent out a Public Notice last fall, and again this spring (linked below).  However, because Nagog Pond is only one of seven water sources used by Concord throughout the year and  supplies drinking water during the summer months only, the 12-month-average concentration of bromate in Concord’s drinking water is about 4 parts per billion (4 ppb), which is well within the allowable limit.

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  1. Alexandra Wahlstrom

    Senior Environmental and Regulatory Coordinator
    Phone: 978-318-3250

Created: 10/31/19             Updated: 5/19/20