Steve Landry, co-Director of the Upper Merrimack Monitoring Program, walks along the bridge on Central Street in Franklin to take an E. Coli s…

Environmental Engineer Mike Hamilton, of Watts Water Technologies, pulls up a bucket filled with water to take an E. coli sample from the Pemi…

Michele Tremblay, left, co-director of the Upper Merrimack Monitoring Program, watches as fellow Co-Director Steve Landry points to two double…

Environmental Engineer Mike Hamilton, of Watts Water Technologies, takes the temperature of the air as he volunteers with the Upper Merrimack …

Michele Tremblay, co-director of the Upper Merrimack Monitoring Program, observes water in an E. coli sample from a bridge on Central Street i…

From left, Environmental Engineer Mike Hamilton of Watts Water Technologies and Upper Merrimack Monitoring Program Co-Directors Steve Landry a…