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 the summers of 2019, 2020 and 2022 was just less than 11 ppb, and because of this, we sent out a Public Notice.  However, because Nagog Pond is just one of seven water sources used by Concord and only supplies drinking water during the summer months, 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. Melissa Simoncini

Created: 10/31/19             Updated: 10/10/2022