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Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

Air Actions, Nevada

NOTE: This content is no longer being updated. The most up to date information can be found in Federal Register Notices and Approved Air Quality Implementation Plans in Region 9.

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Las Vegas (Clark County) Particulate Matter Pollution

Finding of Attainment for the Las Vegas Area for Particulate Matter

On July 21, 2010, EPA determined that the Las Vegas Valley had attained the PM-10 NAAQS as of its applicable attainment date of December 31, 2006 and continues to attain the standard. This determination was based on three years of quality-assured, certified air quality monitoring data.

Direct Final Federal Register Notice Finding Las Vegas Area Has Attained the PM-10 Standard (Aug 3, 2010)

EPA Approval of Clark County PM-10 Plan

On May 3, 2004, EPA finalized its approval of the Clark County PM-10 Plan as meeting the Clean Air Act requirements for serious PM-10 nonattainment areas. As part of this action, EPA approved a series of rules adopted by the Clark County Department of Air Quality Management (DAQM) that control fugitive dust sources, including disturbed vacant lots, construction sites, unpaved roads, paved roads and unpaved parking lots. These are the major control measures relied on in the PM-10 Plan to demonstrate attainment of the health-based standard.

EPA had proposed to approve the Plan in January 2003. EPA received public comments on the proposed approval and has responded to those comments in the document below titled "Response to Comments document".

Documents and related information

Additional documents related to the proposal

Past EPA Actions

In June of 2000, EPA proposed to disapprove the Moderate and Serious Area plans for attaining the 24-hour and annual health-based standards for PM-10 in the Las Vegas Valley, and to deny Nevada's request for an extension to December 31, 2006, to attain the standards. Specifically, EPA proposed to disapprove the following portions of the plans: Reasonably Available Control Measures and Best Available Control Measures (RACM/BACM); Reasonable Further Progress (RFP) and quantitative milestones; and (in the Serious Plan) the emission inventory and the attainment demonstration.

Subsequently, the State of Nevada, at the request of Clark County, withdrew their PM-10 attainment plan submittal. In December of 2000, EPA filed a finding of failure to submit their required PM-10 Plan.

Clark County was then required to submit a revised plan to EPA within 18 months after the finidng. Without an approved pan, the Clean Air Act mandates sanctions, including:

  • More stringent permit requirements for industrial sources
  • Freezing of the county's share of federal highway funds (after 24 months)
Related Documents: EPA's Proposed Disapproval of PM-10 Plan (June, 2000)
Related Documents: EPA's Finding of Failure to Submit PM-10 Plans (December, 2000)

Contact Information

Eleanor Kaplan (kaplan.eleanor@epa.gov)
Office of Air Planning, EPA Region 9
(415) 947-4147

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