🎨Proposed Rule on VOC Emissions for Architectural Coatings in Arizona
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Maricopa County Air Quality Department (MCAQD or "County") portion of the Arizona State Implementation Plan (SIP). These revisions concern emissions of volatile organic compounds (VOC) from architectural coatings. Architectural coatings include house paints, stains, industrial maintenance coatings, traffic coatings, and other similar products. We are proposing to approve local rules to regulate these emission sources under the Clean Air Act (CAA or "Act"). The revisions would update the Arizona SIP by replacing an outdated rule version with the current version in effect and would lower VOC emissions limits for some architectural coatings if contingency measures are triggered in the future. We are taking comments on this proposal and plan to follow with a final action.
Learn More🌫️Proposed Air Quality Revisions in Maricopa County by EPA
The Environmental Protection Agency (EPA) is proposing an approval of revisions to the Maricopa County Air Quality Department (MCAQD) portion of the Arizona State Implementation Plan (SIP). These revisions concern emissions of particulate matter from incinerators, burn-off ovens, and crematories. We are proposing to approve revisions to a local rule that regulates these emissions sources under the Clean Air Act (CAA or "Act"). We are taking comments on this proposal and plan to follow with a final action.
Learn More🌊Notice of Proposed Modifications to Clean Air Act Consent Decree
The Department of Justice has lodged a proposed second material modification to the Consent Decree related to Trident Seafoods Corp's alleged violations regarding ozone-depleting refrigerants. The modification extends certain deadlines and introduces new compliance requirements, including early retrofitting and additional inspections, opening a public comment period for community feedback.
Learn More🌫️EPA Approves Michigan's Regional Haze Plan - Business Implications
The Environmental Protection Agency (EPA) is approving the Regional Haze State Implementation Plan (SIP) revision submitted by the Michigan Department of Environment, Great Lakes, and Energy (EGLE) on August 23, 2021, and supplemented on July 24, 2025, as satisfying applicable requirements under the Clean Air Act (CAA) and EPA's Regional Haze Rule (RHR) for the program's second implementation period. EGLE's SIP submission addresses the requirement that States must periodically revise their long-term strategies for making reasonable progress towards the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas. The SIP submission also addresses other applicable requirements for the second implementation period of the regional haze program. EPA is taking this action pursuant to sections 110 and 169A of the CAA.
Learn More🌬️Clean Air Act Operating Permit Program Revisions in California
With this direct final rule, the Environmental Protection Agency (EPA) is promulgating approval of revisions to the Clean Air Act Operating Permit Program (title V) of the San Diego County Air Pollution Control District (SDCAPCD or "District") in California. The EPA is taking this final action in accordance with federal regulations and the Clean Air Act (CAA or "Act").
Learn More🌬️EPA Delegation Update
On January 21, 2025, the Environmental Protection Agency (EPA) sent the State of West Virginia (West Virginia) a letter acknowledging that West Virginia's delegation of authority to implement and enforce the National Emissions Standards for Hazardous Air Pollutants (NESHAP) and New Source Performance Standards (NSPS) had been updated, as provided for under previously approved delegation mechanisms. To inform regulated facilities and the public, EPA is making available a copy of EPA's letter to West Virginia through this notice.
Learn More🌫️EPA Designates New Air Monitoring Methods for Ambient Air Quality
Notice is hereby given that the Environmental Protection Agency (EPA) has designated one new equivalent method for measuring SO<INF>2</INF>, one new reference method for measuring NO<INF>2</INF>, one new equivalent method for measuring concentrations of PM<INF>2.5</INF>, and one new equivalent method for measuring PM<INF>10-2.5</INF> in ambient air.
Learn More🌫️EPA Proposes Approval of Arkansas Regional Haze SIP for Visibility
Pursuant to the Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Arkansas through the Division of Environmental Quality (DEQ) on August 8, 2022, and clarified by DEQ on July 29, 2025, as satisfying the requirements of the Act and the EPA's Regional Haze Rule (RHR) for visibility protection in mandatory Class I Federal areas (Class I areas) for the program's second implementation period. Arkansas' SIP submission addresses the requirement that states must revise their long-term strategies for making reasonable progress to prevent any future and remedy any existing man-made visibility impairment in the Class I areas. The EPA is taking this action pursuant to sections 110 and 169A of the CAA.
Learn More🌍Extension of Coachella Valley Ozone Attainment Date to 2025
The Environmental Protection Agency (EPA) is finalizing a one- year extension of the "Extreme" attainment date from June 15, 2024 to June 15, 2025, for the 1997 ozone national ambient air quality standards (NAAQS) to the Riverside County (Coachella Valley), California ozone nonattainment area ("Coachella Valley"). The EPA is also taking final action on the exceptional event request submitted by the California Air Resources Board (CARB) on October 11, 2024. This action is based on the EPA's concurrence on the exceptional events demonstration, which removed from the design value (DV) calculation the wildfire-influenced data recorded at the Palm Springs--Fire Station monitor (AQS Site ID #060655001) on July 14-15, 2023, and the extension request submitted by the State of California.
Learn More🌫️EPA Air Quality Regulations Changes Impacting Lane County Businesses
The Environmental Protection Agency (EPA) proposes to approve the June 26, 2024, submitted revisions to the Oregon State Implementation Plan (SIP) applicable in Lane County, Oregon. The changes update the local stationary source permitting regulations to align with existing State regulations. The revisions eliminate generic plant site emission limits in favor of source-specific and source- category specific limits, update construction notification requirements, clarify the use of modeling and monitoring for compliance assurance, and streamline the permit application process.
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