How many people litter in Colorado?

There is no definitive answer to this question as it is difficult to accurately measure the number of people who litter in Colorado. However, according to the Colorado Department of Transportation (CDOT), an estimated 180 million pieces of litter are collected from state highways and roads each year. This equates to approximately 500 pieces of litter per mile of roadway. Additionally, CDOT estimates that the cost of cleaning up litter along Colorado roadways exceeds $10 million annually.