A state court ruled that the Mount Tom power plant in Holyoke, MA will have to install a system to provide continuous monitoring of the facility's emissions to settle state allegations that the plant repeatedly exceeded emissions limits over the past several years. It is the first coal-fired power plant in the state to do so, after the Mount Tom Generating Co. and FirstLight Power Resources, owners of the plant, to agreed meet substantially stricter emissions limits for particulate matter and install a system to ensure compliance.