The number of days that the ozone pollution in Connecticut was above the national standard has increased dramatically in recent years. According to the latest data from the Environmental Protection Agency, Middletown is one of the worst cities in the state for ground level ozone.
Most ground level ozone pollution comes from the burning of gasoline, coal, propane, natural gas, and oil, for electricity, heat, and transportation. Prevailing winds can bring ozone from fossil fuels power plants in other localities. Valleys can keep the ozone from dispersing.
In the latest reporting period, Middletown had 7 days in which the ozone level exceeded the national standard of 75 parts per billion.