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Pacific Southwest, Region 9

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

Air Actions, Nevada

Recent Additions

On February 28, 2014, EPA finalized partial approval and partial disapproval the Nevada infrastructure State Implementation Plan (SIP) submittal for the 2008 Lead (Pb) National Ambient Air Quality Standard.

Adequacy Review of SIP Submissions for Conformity

In EPA's adequacy review, the Agency determines whether the motor vehicle emissions budgets in the State Implementation Plan (SIP) are adequate for conformity purposes.

For more information on SIP submissions currently under EPA adequacy review and SIP submissions EPA has already found adequate, see the EPA's Office of Transportation and Air Quality Transportation Conformity Web Site.

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Regional Haze and Reid Gardner Generating Station

Reconsideration of Best Available Retrofit Technology Compliance Date for Reid Gardner Generating Station

August 2013 - EPA has finalized an 18-month extension of the compliance date for Units 1, 2, and 3 at Reid Gardner Generating Station to meet the Best Available Retrofit Technology emission limits for nitrogen oxides, from January 1, 2015 to June 30, 2016.

March 2013 - EPA granted a petition from Nevada Energy to reconsider the date Reid Gardner Generating Station must meet the Best Available Retrofit Technology emission limits for nitrogen oxides. EPA also proposed an 18-month extension of the compliance date from January 1, 2015 to June 30, 2016.

On March 15, 2013, EPA granted a petition from Nevada Energy to reconsider the date Reid Gardner Generating Station must meet the Best Available Retrofit Technology emission limits for nitrogen oxides. EPA also proposed an 18-month extension of the compliance date from January 1, 2015 to June 30, 2016.

EPA held a public hearing on April 29, 2013 to accept public comment on this proposal. For more details, see the Notice of Public Hearing. The comment period for this proposed rule closed on May 28, 2013.


Nevada's Best Available Retrofit Technology for NOx emissions at Reid Gardner Generating Station

August 2012 - EPA approved partially and disapproved partially Nevada's determination of Best Available Retrofit Technology (BART) to control NOx emissions at Reid Gardner Generating Station, and finalized a Federal Implementation Plan (FIP).

April 2012 - EPA is proposing to approve partially and disapprove partially Nevada's BART determination to control NOx emissions at Reid Gardner Generating Station (RGGS) Units 1, 2 and 3. This is the remaining portion of Nevada's Regional Haze Implementation Plan, that was published in 77 FR 17334 on March 26, 2012. The public is invited to comment for 30 days after publication of this Notice in the Federal Register.


December 2011: Nevada Regional Haze State Implementation Plan (SIP)

EPA is taking final action, approving Nevada's plan to reduce visibility impairment at national parks and wilderness areas inside Nevada and in nearby states. However, EPA is taking no action on the Best Available Retrofit Technology (BART) determination for nitrogen oxide (NOx) at the Reid-Gardner Generating Station. EPA intends to propose action on the NOx BART determination in the future.

For more information, contact: Rory Mays (mays.rory@epa.gov)

Infrastructure SIP Requirements

Nevada Infrastructure SIP Requirements for the 2008 Lead (Pb) National Ambient Air Quality Standard

February 2014 - EPA finalized partial approval and partial disapproval the Nevada infrastructure State Implementation Plan (SIP) submittal for the 2008 Lead (Pb) National Ambient Air Quality Standard.

Nevada Infrastructure State Implementation Plan (SIP) Requirements for the 1997 8-hour Ozone, 1997 PM2.5, and 2006 PM2.5 National Ambient Air Quality Standards (NAAQS)

September 2012 - EPA partially approved and partially disapproved Nevada's infrastructure State Implementation Plan (SIP) submittals for the 1997 8-hour Ozone, 1997 PM2.5, and 2006 PM2.5 NAAQS.

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For more information, contact: Rory Mays (mays.rory@epa.gov)

Clark County

Clark County – Particulate Actions

September 17, 2014 – Redesignation to Attainment for Particulate Matter
EPA approved Nevada's request to redesignate Clark County to attainment for the PM10 standard. We also approved Clark County's plan to maintain compliance with the standard through 2023. For further information, please contact Karina O’Connor (oconnor.karina@epa.gov) or (775) 434-8176.


August 2010 – Finding of Attainment for Particulate Matter
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.  For further information, please contact Karina OConnor (oconnor.karina@epa.gov).


June 2004 – Approval of Attainment Plan for Particulate Matter
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. For further information, please contact Karina OConnor (oconnor.karina@epa.gov).


Clark County – Ozone Actions

December 2012 - Redesignation to Attainment for the 1997 8-hour Ozone NAAQS
EPA approved Nevada's request to redesignate Clark County to attainment for the 1997 8-hour ozone standard. We also approved Clark County's plan to maintain compliance with the standard through 2022. For further information, please contact Ginger Vagenas (vagenas.ginger@epa.gov).

March 2011 – Attainment Finding for 1997 8-hr Ozone NAAQS
EPA published a direct final rule in the Federal Register determining that the Clark County, Nevada nonattainment area has attained the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS).  This direct final action is effective May 31, 2011.  On the day of publication, we also published a proposed action, which provides for a 30-day public comment period.  We did not receive any public comment.


Clark County – Carbon Monoxide Actions

September 2010 - Redesignation to Attainment for Carbon Monoxide
EPA approved Nevada's request to redesignate Clark County to attainment for the carbon monoxide standard. We also approved Clark County's plan to maintain compliance with the standard through 2020. For further information, please contact Karina OConnor (oconnor.karina@epa.gov).

June 2005 – Finding of Attainment for Carbon Monoxide
EPA made a final decision that Las Vegas, Nevada, and the surrounding area meets the federal public health air quality standards for carbon monoxide. For further information, please contact Karina OConnor (oconnor.karina@epa.gov).

August 2006 – Approval of Attainment Plan for Carbon Monoxide
On August 7, 2006, EPA finalized approval of revisions to the state implementation plan (SIP) revisions submitted by the State of Nevada to provide for attainment of the carbon monoxide (CO) national ambient air quality standards (NAAQS) in the Clark County serious CO Nonattainment Area. The revised attainment plan, as modified as requested by EPA, includes revised base year and future year emissions inventories and a revised demonstration of continued attainment of the carbon monoxide national ambient air quality standard in Las Vegas Valley through 2020 based on the most recent emissions models and planning assumptions and establishes new motor vehicle emissions budgets. For further information, please contact Karina OConnor (oconnor.karina@epa.gov).

July 2004- Approval of State Implementation Plan (SIP) Revisions
On July 23, 2004, EPA finalized its approval of the state implementation plan (SIP) revisions submitted by the State of Nevada to provide for attainment of the carbon monoxide (CO) national ambient air quality standards (NAAQS) in the Clark County serious CO Nonattainment Area. EPA finalized approval of the Clark County serious area carbon monoxide (CO) plan because the plan demonstrates attainment of the national CO standard and meets the applicable Clean Air Act (CAA) requirements. As part of this action, EPA approved control measures that are relied upon in the CO plan to demonstrate attainment of the health-based standard. EPA approved Nevada’s Inspection and Maintenance (I/M) program under section 187(a)(6) of the CAA, Clark County’s Cleaner Burning Gasoline (CBG) program under section 211(c)(4)(C) of the CAA, and Nevada’s wintertime specifications related to Reid Vapor Pressure (RVP) for gasoline sold in Clark County.

Clark County Transportation Conformity Plan, Clark County, Nevada (Las Vegas)
November 2008
- EPA published a direct final notice approving the Clark County Transportation Conformity Plan. Transportation conformity is required under section 176(c) of the Clean Air Act to ensure that federally supported highway, transit projects, and other activities are consistent with ("conform to") the purpose of the state implmentation plan. This means that transportation activites will not cause new air quality violations, worsen violations, or delay timely attainment of the relevant national ambient air quality standards.

No comments were received, and the approval was effective on January 6, 2009. The Federal Register notices and the technical support document, which contains EPA's evaluation of the Clark county transportation conformity plan, are included below.

Mohave Generating Station

Washoe County

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