The Clean Air Muscatine (CLAM) records date from 2006 to 2023 and measure 22.5 linear inches in five boxes. The records are arranged in five series: Administrative, Environmentalism, Grain Processing Corporation Lawsuit, Renewable Energy, and Newspaper Clippings. The Administrative series (2011-2022) holds meeting minutes, bylaws, and materials related to outreach done by CLAM. This series is completed by materials related to the Muscatine County Energy District, which focused on renewable energy. The Environmentalism series (2009-2012) contains research gathered by CLAM and conducted by other organizations on water and air quality, the Clean Air Act (CAA) and Environmental Protection Agency (EPA) requirements and standards, and human health consequences related to pollutants.

The Grain Processing Corporation Lawsuit series (2010-2017) details the lawsuit that CLAM and the Iowa Department of Natural Resources filed against Grain Processing Corporation (GPC) over their noncompliance with air quality standards. Also included is information related to the class-action settlement, which awarded money to individuals living within a 1.5-mile radius of the GPC plant.

The Renewable Energy series (2009-2023) is made up of CLAM’s research and organizing efforts to move Muscatine County away from coal as a main energy source and toward renewable sources, such as wind and solar energy. Included are materials of networks and organizations across the Midwest focused on renewable energy.

The Newspaper Clippings series (2006-2020) holds articles from several newspapers, mainly The Muscatine Journal and The Des Moines Register, focusing on environmentalism, air and water quality, pollution, and renewable energy. The GPC settlement and class-action lawsuit are also highlighted in the clippings.