Relating to the consideration of the cumulative effects of air contaminant emissions in the emissions permitting process.

HB 3926 would require environmental agencies to consider the combined impact of air pollution from multiple sources when reviewing permits for new or modified facilities that emit air contaminants. This directly affects businesses seeking to build or expand operations with air emissions, as well as state environmental agencies responsible for permit approvals. The bill would add a new step to the permitting process, mandating an evaluation of how cumulative emissions from various sources together affect local air quality. Specific details about the evaluation methodology or thresholds are not provided in the available bill text.