The EPA has classified Colorado as a ‘serious’ violator of federal air laws for ozone. Colorado has been failing ozone air pollution standards since 2004, creating a greater presence of asthma in the Denver and Front Range communities. Colorado Department of Public Health and Environment plans to issue 600 new permits that will set limits on air pollution. The state must reduce its ozone pollution to 70 parts per billion by August 2021 (current ozone levels are 79 parts per billion). Read More.