Posted Thursday, October 29, 2026 

30-DAY NOTICE OF PUBLIC COMMENT PERIOD AND PUBLIC HEARING
ON THE PROPOSED PM_2.5 NAAQS INFRASTRUCTURE
STATE IMPLEMENTATION PLAN

DAQ welcomes comments on the proposed Clark County Portion of the Nevada State Implementation Plan to Meet the PM_2.5 Infrastructure SIP Requirements of Clean Air Act Section 110(a)(2). On March 6, 2024, the U.S. Environmental Protection Agency (EPA) revised the annual National Ambient Air Quality Standard (NAAQS) for fine particulate matter (PM_2.5), lowering the primary standard from 12 micrograms per cubic meter (μg/m3) to 9 μg/m3. Under Sections 110(a)(1) and 110(a)(2) of the Clean Air Act, Clark County is required to submit an Infrastructure State Implementation Plan (I-SIP) that demonstrates its ability to implement, maintain, and enforce the revised standard whether or not the area is in compliance with the new NAAQS. If approved and adopted by the Clark County Board of County Commissioners (BCC), the I-SIP will be submitted to the Nevada Division of Environmental Protection and EPA as a revision to the Nevada SIP.

The BCC will consider the proposed plan, along with all written and any oral public comments, at a public hearing at 10:00 AM (PT) on January 19, 2027, in the Commission Chambers, Clark County Government Center, 500 S. Grand Central Parkway, Las Vegas, NV.

You can view the documents below.

Deadline for comment submission is 5:00 PM (PT) on Monday, November 30, 2026.