Technical Data and Reports on Carbon Monoxide Measurements and SIP Status
EPA collects data from the states and regions on their air quality and state implementation plan (SIP) progress. This information is compiled in a database, and used to create reports, trend charts, and maps.
SIP status reports
Reports for nonattainment area SIP requirements
- Status of SIP requirements, listed by state: select a state from the map to view its SIP requirements progress report.
- SIP status reports listed by CO requirement: each criteria pollutant includes a full list of the requirements for that pollutant's SIP. Each requirement then links to a report on that requirement's progress, by state.
Reports for infrastructure SIP requirements
SIPs approved by EPA
- View approved SIPs by state, organized by states in each EPA region.
Air quality data
AirNow: see real-time air pollution data in the United States.
Design Values: view statistics that describe the air quality status of a given area relative to the level of EPA's National Ambient Air Quality Standards. These Excel reports are listed by pollutant.
- Carbon Monoxide Area Information listed in the Green Book: listings of area designations for CO. It includes current designation and classification status, area maps, reports, and Federal Register notices.