A class action lawsuit accuses the Orlando Utilities Commission and several Orlando-based real estate entities of failing to protect more than 30,000 people from the harmful byproducts of a nearby power plant.

The complaint filed Monday names residents of the Stoneybrook, Avalon Park, Eastwood and other Orlando communities as plaintiffs in the case against the utilities commission, developer Lennar Corp., builder U.S. Home Corp., the real estate firm Avalon Park Group and its CEO, Beat Kahli. According to the filing, the defendants are legally liable under Florida Statutes 376.30 through 376.319, which regulate legal action with relation to pollutants and hazardous substances.