Starting September 1st, the entire Farmington River from the dam in Riverton for 21 miles downstream to the Rt 179 bridge in Unionville is now Catch & Release until Opening Day in April 2020.
If you see anybody keeping fish in this section, please call the CT DEEP at 1-800-824-HELP and report the violation. Even if they are not able to respond to it on time, the info goes into their database and helps to create better/more policing of the area in the future. They are severely understaffed/underfunded and cannot answer all calls quickly, but it's still important for you to report it.
Check out the Farmington River stream flow rate at the Riverton CT station.