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DAQ Home > Air Pollutants > PM2.5

PM2.5 SIP Developmenthttp://www.deq.utah.gov/Admin/siteindex/sitemap.htm#as

Updated January 6, 2014

The Air Quality Board will meet at 1:30 p.m. Wednesday, Jan. 8 to formally adopt the emission-reduction measures for the state's air plan covering area and point sources. See the Air Quality Board agenda for more information.

Utah has three nonattainment areas for the 2006 24-hr PM2.5 health standard. To bring these areas into compliance with the revised standard, the Division of Air Quality (DAQ) developed State Implementation Plans for the Salt Lake, Provo, and Logan nonattainment areas. DAQ submitted the Logan SIP to the EPA in December 2012. The proposed Salt Lake and Provo SIPs became available for public comment in October 2013.

After the Environmental Protection Agency (EPA) designated areas along the Wasatch Front and Cache County as nonattainment for the PM2.5 National Ambient Air Quality Standards (NAAQS), the Division of Air Quality (DAQ) initiated a three-year process to develop a State Implementation Plan (SIP) to reduce current PM2.5 emissions and bring fine particulate levels below the standard.

DAQ employed an inclusive public involvement process to assist the agency in its SIP development. More than 100 participants from each of the six nonattainment counties met several times during the SIP development process to provide ideas and recommendations for emission control strategies that would complement community needs.

Initial reductions resulting from workgroup recommendations reduced PM2.5 levels to within a few micrograms of the standard. DAQ spent another year identifying controls beyond these recommendations to bring areas into attainment.

The PM2.5 State Implementation Plan (SIP) development process is nearing completion. DAQ submitted the Logan SIP to the EPA in December 2012. The remaining two SIPs will be available for public comment beginning October 1, 2013.

Logan SIP

The Utah Air Quality Board adopted the Logan, UT-ID PM2.5 Nonattainment SIP on December 5, 2012. The Logan SIP includes area source control strategies and a motor vehicle emission inspection and maintenance (I/M) program to meet the PM2.5 NAAQS.

Salt Lake and Provo PM2.5 SIPs

On September 11, 2013, the Air Quality Board proposed the two remaining SIPs for the Salt Lake City Nonattainment Area and the Provo Nonattainment Area for public comment. The public comment period for the SIPs begins October 1 and runs through October 31, 2013.

Additional control strategies for the Wasatch Front SIPS include installation of Best Available Control Technology (BACT) on large point sources, area source control measures for specific source categories, and transportation conformity with SIP emission budgets in transportation plans and programs developed by municipal planning organizations (MPOs) and the Utah Department of Transportation in these nonattainment areas.

Rulemaking for the SIP

The Air Quality Board has adopted many of the area source rules that are part of the SIP. These area source rules are either currently in effect or will go into effect by January 1, 2014. A list of proposed rules and their public comment periods is available online.

Technical Support Documents

The DAQ has completed two Technical Supports Documents (TSDs) a TSD for the Logan PM2.5 SIP and a Wasatch Front TSD that covers the Salt Lake and Provo PM2.5 SIPs. A TSD is not a part of the SIP, but is a companion piece that serves as the technical basis for the decisions made in the SIP. It describes the emissions inventories, modeling, and control strategies. To request a copy of a TSD on a CD, please make a request to Mark Berger.

Additional PM2.5 Development Information.

The Division produced a short informational video and companion booklet in 2012 to provide the public with information about the PM2.5 SIP development process. The video, booklet, and an additional fact sheet are linked below.

Information about the proposed SIP and rules, public comment periods, and public hearings will also be published in the State Bulletin.


During the SIP and rule comment periods, comments can be submitted, in writing, to:

Public Comment
Utah Division of Air Quality
PO Box 144820
Salt Lake City, UT 84114-4820

or by e-mail to Mark Berger.

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