Environmental advocacy group Save the Sound has filed lawsuits against four Connecticut municipalities over alleged violations in tracking stormwater flow into rivers and streams.  The suit accuses Redding, Ridgefield, Middletown and Burlington of failing to keep track of their municipal stormwater systems.  The Norwalk River is mentioned in the lawsuit as one of nearly a dozen impaired bodies of water threatened by pollution.  Municipalities are required to file paperwork regarding their stormwater systems with state regulators.  The Ridgefield town engineer tasked with filing annual stormwater reports retired in 2018, and the position has not been filed.  First Selectman Rudy Marconi noted that the town plans to upgrade sewer lines and a treatment plant to address water quality and environmental issues.  Save The Sound says there are also concerns in New Milford and Southington, but they have since been in contact with the organization to discuss the concerns.