Multi-decadal Analysis of Particulate Matter Pollution: Impact of Concentrated Animal Farming Operations (CAFOs) in North Carolina

Concentrated Animal Farming Operations (CAFOs) are widespread in North Carolina (NC), with a large number of these operations being located in Wayne, Duplin, Sampson, and Bladen counties. The CAFOs emit several atmospheric pollutants including methane and ammonia. These emissions can undergo chemical transformation and contribute to particulate matter production. We conducted a multi-decadal analysis of NASA MODIS derived aerosol products in combination with in situ observations. We compared the spatial variability of aerosols between the first and second decades of this century. We found differing behavior over Wayne, Duplin, Sampson, and Bladen counties with an enhanced reduction in aerosols over this region compared to the surroundings. Results of this analysis will be presented including the potential role of how the emission reduction due to the Clean Air Act in explaining the differing behavior observed over these counties.