Central Regional Air Planning Association (CENRAP):
CENRAP was one of the five Regional Planning Organizations in the U.S. to assist states and tribes develop regional haze state/tribe implementation plans. In addition to states and tribes in the nine states of Arkansas, Iowa, Kansas, Louisiana, Minnesota, Missouri, Nebraska, Oklahoma, and Texas, CENRAP's membership included federal agencies and other interested parties. CENRAP is no longer active and the website is not accessible. For information regarding CENRAP, please call 405-813-4301.

National Oil and Gas Emissions Committee Information Repository -http://vibe.cira.colostate.edu/ogec/home.htm

EPA Agriculture Programs, Best Management Practices and Topics of Interest - https://www.epa.gov/agriculture/agriculture-programs-best-management-pra...
USDA Agriculture Air Quality Task Force - https://www.nrcs.usda.gov/wps/portal/nrcs/main/national/air/taskforce/
 

EPA monitoring data - http://www.epa.gov/airdata/
EPA - notices of intent to sue - https://www.epa.gov/ogc/notices-intent-sue-us-environmental-protection-agency-epa
EPA's regulatory development tracker - https://www.epa.gov/laws-regulations/regulations#track
EPA's Technical Air Pollution Resources - https://www.epa.gov/technical-air-pollution-resources
EPA - Office of Air and Radiation - http://www2.epa.gov/aboutepa/about-office-air-and-radiation-oar
EPA Region 6 - https://www.epa.gov/aboutepa/epa-region-6-south-central
EPA Region 7 - https://www.epa.gov/aboutepa/epa-region-7-midwest
Federal legislative, judicial, executive branch documents (ex: Federal Register, U.S. Court opinions) - http://www.gpo.gov/fdsys/
Federal Regulations - https://www.regulations.gov

ECOS - http://www.ecos.org/
AAPCA - https://cleanairact.org/
NAACA - http://www.4cleanair.org

LADCO - http://www.ladco.org/
MARAMA - http://www.marama.org/
Metro4-SESARM - http://www.metro4-sesarm.org/
NESCAUM - http://www.nescaum.org/
OTC - http://www.otcair.org/
WESTAR/WRAP - http://westar.org/ and http://www.wrapair2.org/default.aspx