An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Summary of Pinehurst PM-10 Limited Maintenance Plan and Redesignation


On March 15, 1991, the EPA published a notice announcing that the Pinehurst area had been designated a PM10 NAA upon the November 15, 1990 enactment of the 1990 CAA Amendments.

On November 6, 1991, the Pinehurst PM10 NAA, which included the City of Pinehurst, was classified as moderate under sections 107(d)(4)(B) and 188(a) of the CAA (56 FR 56694 (PDF)(368 pp, 77 MB, About PDF)), and it had an attainment date of no later than December 31, 1994.

On December 21, 1993, the EPA designated the Pinehurst PM10 Expansion NAA, a contiguous area to the south of the City of Pinehurst and the existing Pinehurst PM10 NAA. This action became effective January 20, 1994 (58 FR 67334 (PDF)(340 pp, 86 MB)). The Pinehurst Expansion area had an attainment date no later than December 31, 2000.

On September 29, 2017, the IDEQ submitted the Pinehurst PM10 LMP to EPA for approval and has requested that the EPA redesignate the Pinehurst NAA to attainment for the PM10 NAAQS. This request and plan apply to both the City of Pinehurst and the Pinehurst PM10 Expansion area.

On September 11, 2018, the EPA published its approval of the limited maintenance plan submitted by the IDEQ and redesignated the entire area to attainment for the 24-hour PM10 standard (Proposal: 83 FR 21976 (PDF)(8 pp, 281 K); Final Rule: 83 FR 45830 (PDF)(6 pp, 292 K)).

Summary of Control Measures

Both the attainment plan and the maintenance plan rely primarily on control strategies for residential wood smoke including a woodstove changeout program, home weatherization, voluntary wood smoke curtailment, and outreach/education.

EPA Effective Dates

October 11, 2018