In January, 2015, EPA issued a memo that will help states as they develop State Implementation Plans to address cross-state transport of air pollution for the 2008 ozone standards. This memo summarizes:
- Proven approaches used to address transport for previous ozone standards
Results of EPA's preliminary air quality modeling data that characterizes ozone transport.
Files and Documents
- Data File for the 2008 Ozone NAAQS Transport Assessment (XLS)(2 pp, 337 K)
- Data File of 8-Hour Ozone Model Performance Statistics by Monitoring Site for the 2011 Base Year CAMx Model Simulation (XLS)(2 pp, 275 K)
- Model Performance Statistics Definitions (DOC)(3 pp, 44 K)
Memo: Information on the Interstate Transport "Good Neighbor" Provision for the 2008 Ozone National Ambient Air Quality Standards under Clean Air Act Section 110(a)(2)(D)(i)(I) (PDF)(16 pp, 1 MB,
Learn about state implementation plans (SIPs) used to address the "Good Neighbor" Provision of the Clean Air Act (CAA) and EPA's preliminary air quality monitoring data for ozone for the year 2018.
Air Quality Modeling Technical Support Document for the 2008 Ozone NAAQS Transport Assessment (PDF)(155 pp, 4 MB,
This technical support document (TSD) describes the air quality modeling performed to help states address the requirements of Clean Air Act (CAA) Good Neighbor SIPs for the 2008 ozone National Ambient Air Quality Standards (NAAQS).