An Act establishing the monitoring of ultrafine particulates

This bill requires the Massachusetts Department of Environmental Protection to monitor and report on ultrafine particulate matter, which consists of particles smaller than 100 nanometers. The law mandates that existing air quality monitoring stations include measurements for these tiny particles alongside current tracking of larger particulate matter. Additionally, the bill directs the department to update its regulations so that project proposals must include data on ultrafine particulates when seeking air quality approvals. These changes are set to take effect on January 1, 2025, aiming to improve the state's ability to track and manage specific types of air pollution.