Blue-green algae is among the water quality problems residents want to address.

Representatives of two dozen groups from around the state plan to tell lawmakers how their lives have been affected by things such as hazardous bacteria in drinking water, toxic algae that has killed pets and closed swimming beaches, and receding lakes that have left docks high and dry, Greening said. While not aimed at any particular legislative proposal, the effort is intended as an initial warning shot across the bow of a state government that has rolled back water protections for the better part of a decade, Greening said.