Mingo Refuge Air Monitoring Site
Located in the Mingo National Wildlife Refuge, this air monitor provides data to help federal and state agencies assess regional haze. It's part of a program called Interagency Monitoring of Protected Visual Environments (IMPROVE), charged with improving visibility in national parks larger than 6,000 acres and national wilderness areas larger than 5,000 acres.
Of the approximately 155 national parks and wilderness areas in the program, two are in Missouri: Mingo National Wildlife Refuge and Hercules Glades.