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Four Corners Air Quality Group



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     August 27, 2009
     August 20, 2008
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Welcome to the Four Corners Air Quality Group home page!

The Four Corners Air Quality Group is a forum for individuals interested in air quality to meet, learn about current conditions, review progress on mitigation of air quality impacts, and generally contribute to clean air in the Four Corners area.

The Group meets at least once per year and more often if circumstances warrant it. The Group is convened by the States of Colorado and New Mexico, with the support of a range of state, tribal and federal agencies.

To join the Four Corners Air Quality Group, please sign up. You will be notified of meetings and other important air quality information affecting the Four Corners area.

Four Corners Air Quality Related Announcements

The Next Four Corners Air Quality Group meeting is planned for Spring 2015.

September 9, 10, 2013 meeting materials

May 30, 2012 meeting materials

  • April 17, 2012 - EPA issued cost-effective regulations, required by the Clean Air Act, to reduce harmful air pollution from the oil and natural gas industry while allowing continued, responsible growth in U.S. oil and natural gas production.  More information including fact sheets is available here: http://www.epa.gov/airquality/oilandgas/

  • December 21, 2011 - EPA announces Mercury and Air Toxics Standards (MATS) for power plants - The U.S. Environmental Protection Agency (EPA) announced standards to limit mercury, acid gases and other toxic pollution from power plants. http://www.epa.gov/mats/actions.html

  • NMED and EPA Field campaign to measure and speciate VOCs at Navajo Lake, Substation and Bloomfield in 2004/2005 and 2009 fourcornersvoc
  • September 22, 2011 - EPA clarifies the status of the ozone National Ambient Air Quality Standard (NAAQS) and outlines implementation steps moving forward.

    For more information on  the ozone standard you may visit the EPA website here: http://www.epa.gov/airquality/ozonepollution/

    Sept 2011: The San Juan Public Lands Center (SJPLC) has released a new supplement to the Draft Environmental Impact Statement (Draft EIS) for the San Juan Plan Revision.  The Draft EIS Supplement is available for review and comment. It covers some areas in Southwest Colorado including new projections for the Gothic Shale Gas Play and some new air quality model results. The Supplement & supporting documents (e.g., the revised Reasonable Foreseeable Development scenario and air quality technical support document) & info on open houses are available online at http://ocs.fortlewis.edu/forestplan.

  • The Navajo Nation EPA (NNEPA) 2011 Environmental Conference was held August 23 - 25, 2011 at the Navajo Nation Museum located in Window Rock, AZ. Video and presentations from the conference are available here: http://www.navajonationepa.org/conference.html
  • On June 2,2011 the New Mexico Environmental Improvement Board voted unanimously to approve the New Mexico Environment Department's proposed Regional Haze State Implementation Plan, as well as the State Implementation Plan for the good neighbor provisions related to visibility for the 1997 ozone and PM 2.5 standards." The plan is available here: http://www.nmenv.state.nm.us/aqb/reghaz/Regional-Haze_index.html.
  • "Passive Monitoring of Ambient Reactive Gaseous Mercury in the Four Corners Area and Eastern Oklahoma" This presentation (available here: http://nadp.isws.illinois.edu/meetings/fall2010/post/session4.html) summarizes the first year of a two year air monitoring project estimating reactive gaseous mercury (RGM, a.k.a. gaseous oxidized mercury, GOM) dry deposition rates in the Four Corners area and eastern Oklahoma. The project collaborators include the U.S. Environmental Protection Agency (EPA) Region 6, EPA Office of Research and Development (ORD), Frontier Global Sciences, Alion, the New Mexico Environment Department (NMED), the National Park Service (NPS), the Bureau of Land Management (BLM), the Jemez Pueblo, and the Cherokee Nation.
  • "EPA Supplements October 2010 Proposal for Best Available Retrofit Technology for Four Corners Power Plant with Alternative Option" The U.S. Environmental Protection Agency proposes to allow Four Corners Power Plant (FCPP) to close Units 1 – 3 by 2014 and to meet a NOx limit of 0.098 lb/MMBtu on Units 4 and 5 by July 31, 2018, achievable with the installation and operation of selective catalytic reduction (SCR), in lieu of meeting the emission limits in our October 19, 2010 proposed rulemaking for oxides of nitrogen (NOx) and particulate matter (PM). EPA’s analysis of this alternative emission control strategy is included in the Supplemental Notice.  For more information regarding the four public hearing events scheduled for the week of March 28, 2011, or to download the signed supplemental notice, please see the website at: http://www.epa.gov/region9/air/navajo/index.html#proposed

Snowdon Pothole Lake


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