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The US Environmental Protection Agency has proposed dividing the existing Fairbanks North Star Borough nonattainment area into separate zones covering Fairbanks and Goldstream Valley, and North Pole, while also proposing a clean data determination for the Fairbanks zone.
✦ AI SUMMARY 30-second read
- EPA proposes splitting the Fairbanks North Star Borough nonattainment area into two distinct zones covering the same overall geography.
- A clean data determination is proposed for the Fairbanks and Goldstream Valley area, finding it is currently meeting the 2006 PM2.5 standard.
- If finalised, certain Clean Air Act planning obligations for the Fairbanks area would be suspended as long as the standard continues to be met.
Why it matters: The proposed changes would relieve Alaska of several air-quality planning requirements for the Fairbanks zone while the North Pole area remains under full nonattainment obligations.
This summary was generated by AI. Editors may review and update it.
Document details
| Document type | Consultation |
|---|---|
| Issued by | US Environmental Protection Agency |
| Region | Global |
| Published | 16 November 2026 |
The US Environmental Protection Agency has published a proposed rule to approve Alaska's request to revise the boundary of the Fairbanks North Star Borough nonattainment area for the 2006 primary 24-hour fine particulate matter standard. The proposal would split the existing single nonattainment area into two separate areas: one covering Fairbanks and the Goldstream Valley, and one covering North Pole. Together, the two proposed areas cover the same geographic territory as the existing area.
Alongside the boundary revision, the EPA is proposing to issue a clean data determination for the proposed Fairbanks and Goldstream Valley nonattainment area, on the basis that the area is currently attaining the 2006 24-hour PM2.5 standard. Public comments on the proposal must be received on or before December 16, 2026, and may be submitted under Docket ID No. EPA-R10-OAR-2026-8551.
What the document says
The EPA is acting under Clean Air Act sections 107, 110, 172, and 189. Section 107 authorises a state governor to submit a revised area designation, and the agency must approve or deny such a request within 18 months. The boundary revision does not alter the total geographic coverage of the nonattainment designation.
The proposed clean data determination, if finalised, would suspend requirements for the Fairbanks and Goldstream Valley area to submit an attainment demonstration, a reasonable further progress plan, quantitative milestones and milestone reports, and contingency measures. Those obligations would remain suspended for as long as the area continues to meet the standard. Should the area later be found to be violating the standard, the suspended requirements would be reinstated at a date to be determined and announced by the EPA.
Background
On November 13, 2009, the EPA designated a portion of the Fairbanks North Star Borough as nonattainment for the 2006 24-hour PM2.5 standard, drawing on monitored air quality data for 2006 to 2008. The design value recorded at the State Office Building monitoring site for that period was 43 µg/m³, against a standard of 35 µg/m³.
Alaska's Department of Environmental Conservation noted that exceedances of the standard occur during cold and stagnant winter weather, and in summer months due to wildfires, which the department flagged as exceptional events. The ambient air monitoring network in the area has expanded since initial designation, with stations established at 907 Terminal Street in downtown Fairbanks in November 2009 and near the North Pole Fire Station on Hurst Road on March 1, 2012.
Who is affected
Alaska and its Department of Environmental Conservation would be the primary parties affected, as the state submitted the redesignation request and bears the planning obligations that may be suspended. Residents and businesses in the Fairbanks and Goldstream Valley area would be in a zone where certain regulatory planning requirements are paused, while those in the North Pole area would remain subject to the full set of nonattainment obligations.
Transportation conformity requirements are also addressed in the proposal, meaning planning for federally funded transport projects in the affected areas may be subject to revised implementation procedures.
What happens next
The comment period closes on December 16, 2026. After reviewing submissions, the EPA will determine whether to finalise the boundary revision and the clean data determination. If both are finalised, the North Pole area would continue under its existing nonattainment obligations while the Fairbanks and Goldstream Valley area would have certain planning requirements held in abeyance.