EPA Tinkers With Colorado Smog Rules Again
Published Date: 6/23/2026
Proposed Rule
Summary
The EPA is proposing to approve Colorado’s plan to control smog-causing pollution in the Denver Metro and North Front Range area. This plan updates rules for certain polluters and fixes past issues, helping the region meet clean air goals. People and businesses in this area should note the July 23, 2026 deadline to share their thoughts on the plan.
Analyzed Economic Effects
5 provisions identified: 1 benefits, 4 costs, 0 mixed.
Annual Reporting for Metal Parts Coaters
Colorado’s April 2, 2025 SIP revisions require metal parts and metal products coating sources in the Denver Metro/North Front Range area to submit an annual report showing that products used during the calendar year meet the VOC content limits. These sources must keep related records for five years and the reports are made available through the State’s Public Records Portal.
Semi-Annual Reporting for Wood Coaters
Colorado’s April 2, 2025 SIP revisions require wood products coating sources in the Denver Metro/North Front Range area to submit a semi-annual report documenting that products used during the prior semi-annual period comply with VOC content limits. Records must be kept for five years and the reporting information is available through the State’s Public Records Portal.
Semi-Annual Reports for Combustion Equipment
Colorado’s April 2, 2025 SIP revisions add a semi-annual reporting requirement for combustion equipment at major sources in the Denver Metro/North Front Range area. Affected sources must report compliance with combustion process adjustment requirements and keep records for five years; the information is accessible through the Division’s Public Records Portal.
Semi-Annual Reporting for Foam Manufacturing
Colorado’s April 2, 2025 SIP revisions require foam manufacturing operations in the Denver Metro/North Front Range area to submit semi-annual reports documenting compliance with VOC emission limits. Records must be maintained for five years and the reports are available via the State’s Public Records Portal.
Public Access to Compliance Records
The SIP revisions make the reports and related records for the listed industry rules available through the Colorado Air Pollution Control Division’s Public Records Portal, so compliance information for the Denver Metro/North Front Range area can be accessed by the public. The EPA is proposing to approve these revisions; the public comment deadline for this proposal is July 23, 2026.
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Key Dates
Department and Agencies
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