In keeping with federal and state requirements, Concord tests its drinking water for all regulated substances.  One of these substances, Bromate, has an allowable concentration, as a running annual average (RAA), of 10 parts per billion (10 ppb).  The Bromate RAA through the Q3 2022 samples was equal to 0.011 mg/L (11 ppb) and because of this, we sent out a Public Notice.