Review of the National Ambient Air Quality Standards for Particulate Matter

 
Docket ID: EPA-HQ-OAR-2007-0492
Agency: Environmental Protection Agency (EPA)
Summary:
Under the Clean Air Act, EPA is required to review the science upon which the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) are based and the standards themselves every 5 years. On October 17, 2006, EPA published a final rule to revise the primary and secondary NAAQS for particulate matter to provide increased protection of public health and welfare. With regard to the primary standards for fine particles (PM2.5 generally referring to particles with an aerodynamic diameter less than or equal to 2.5 micrometers, µm), EPA revised the level of the 24-hour PM2.5 standard to 35 micrograms per cubic meter (µg/m3) and retained the level of the annual PM2.5 standard at 15 µg/m3. With regard to the primary standards for coarse particles (PM10, generally referring to particles with an aerodynamic diameter less than or equal to 10 µm), EPA retained the 24-hour PM10 standard and revoked the annual PM10 standard. With regard to the secondary PM standards, EPA made them identical in all respects to the primary PM standards, as revised. In subsequent litigation, the U.S. Court of Appeals for the District of Columbia Circuit remanded the primary annual PM2.5 standard and secondary PM2.5 standards to EPA. The EPA is responding to the court's remands as part of the current review of the PM NAAQS. EPA initiated the current review in 2007 and issued a proposed rule in June 2012 (77 FR 38890). Based on its review of the air quality criteria and the 2006 standards, EPA proposed to revise the primary annual PM2.5 standard by lowering the level to within a range of 12.0 to 13.0 µg/m3 in conjunction with retaining the primary 24-hour PM2.5 standard. The EPA also proposed to retain the current primary 24-hour PM10 standard. With regard to the secondary PM standards, EPA proposed to retain the current standards (i.e., 24-hour and annual PM2.5 standards and 24-hour PM10 standard) to provide protection for non-visibility welfare effects and to establish a distinct secondary standard to address PM-related visibility impairment.
RIN: 2060-AO47
Impacts and Effects: None
CFR Citation: 40 CFR 50,51,52,53,and 58
Priority: Economically Significant
UA and Regulatory Plan Information open glossary dialog  
Publication Period: Fall 2012
Agenda Stage of Rulemaking: Completed Action
Major Rule: Yes
Legal Authorities: 42 USC 7408, 42 USC 7409
Government Levels Affected: Federal
Federalism Implications: No
Unfunded Mandates: No
Requires Regulatory Flexibility Analysis: No
Small Entities Affected: No
International Impacts: No
Energy Effects: No
Included in Regulatory Plan: No
Legal Deadline
ActionSourceDescriptionDate
JudicialOtherConsent Decree - As per 8/31/2012 consent decree; American Lung Ass'n v. EPA, D.D.C., #12-024312/14/2012
JudicialNPRMCourt deadline received on May 31 2012. Extended to June 14 on June 6.06/14/2012
Timetable
ActionDateFR Citation
NPRM06/29/201277 FR 38890
Correction06/29/201277 FR 38760
Final Rule01/18/2013
Docket Details open glossary dialog  
Related RINs: None
Related Dockets: None
Type: Rulemaking
Location: HQ-OAR
 

Primary Documents

View All  (13)
Comment Period Closed
Aug 31, 2012 11:59 PM ET
Proposed Rule
Posted: 06/29/2012
ID: EPA-HQ-OAR-2007-0492-0456
Comment Period Closed
Aug 30, 2010 11:59 PM ET
Notice
Posted: 07/08/2010
ID: EPA-HQ-OAR-2007-0492-0116
Comment Period Closed
Apr 26, 2010 11:59 PM ET
Notice
Posted: 04/01/2010
ID: EPA-HQ-OAR-2007-0492-0078
Comment Period Closed
Mar 15, 2010 11:59 PM ET
Notice
Posted: 01/26/2010
ID: EPA-HQ-OAR-2007-0492-0066
Comment Period Closed
Nov 09, 2009 11:59 PM ET
Notice
Posted: 10/05/2009
ID: EPA-HQ-OAR-2007-0492-0043

Supporting Documents

View All  (474)
Comments Not Accepted
Supporting & Related Material
Posted: 05/28/2013
ID: EPA-HQ-OAR-2007-0492-10121
Comments Not Accepted
Supporting & Related Material
Posted: 05/28/2013
ID: EPA-HQ-OAR-2007-0492-10123
Comments Not Accepted
Supporting & Related Material
Posted: 05/28/2013
ID: EPA-HQ-OAR-2007-0492-10122

Comments

View All  (9,639)

231,516
Comments Received*
Regulatory Timeline
Pre Rule
Current Stage
Proposed Rule
Current Stage
Final Rule
Current Stage
Completed
Current Stage
Agency Contact
Beth Hassett-Sipple
AR
hassett-sipple.beth@epa.gov
919 541-4605
919 541-0237 (Fax)
C504-06, Research Triangle Park, NC 27711
Research Triangle Park, NC 27711
Karen Martin
AR
Martin.Karen@epamail.epa.gov
919 541-5274
919 541-0237 (Fax)
C504-06, Research Triangle Park, NC 27711
Research Triangle Park, NC 27711
*This count refers to the total comment/submissions received on this docket, as of 11:59 PM yesterday. Note: Agencies review all submissions, however some agencies may choose to redact, or withhold, certain submissions (or portions thereof) such as those containing private or proprietary information, inappropriate language, or duplicate/near duplicate examples of a mass-mail campaign. This can result in discrepancies between this count and those displayed when conducting searches on the Public Submission document type. For specific information about an agency’s public submission policy, refer to its website or the Federal Register document.