Approved Air Quality Implementation Plans in Region 10
EPA's Region 10 serves Alaska, Idaho, Oregon, Washington, and 271 federally recognized tribes.
State Implementation Plans
Approved regulations, sources specific requirements, and non-regulatory provisions.
EPA-approved regulations and planning documents.
Alaska
- EPA Approved Regulations in the Alaska SIP
- EPA Approved Alaska State Source Specific Requirements [Reserved]
- EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Alaska SIP
- Alaska Plan Summaries
Idaho
- EPA Approved Regulations in the Idaho SIP
- EPA Approved Idaho State Source-Specific Requirements
- EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Idaho SIP
- Idaho Plan Summaries
Oregon
- EPA Approved Regulation in the Oregon SIP
- EPA Approved Oregon State Source-Specific Requirements
- EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Oregon SIP
- Oregon Plan Summaries
Washington
- EPA Approved Regulations in the Washington SIP
- EPA Approved Washington State Source-Specific Requirements
- EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Washington SIP
- Washington Plan Summaries
Federal Implementation Plans
Idaho
Tribal Implementation Plans
Swinomish Reservation
- EPA Approved Regulations in the Swinomish TIP
- EPA Approved Source-Specific Requirements in the Swinomish TIP [Reserved]
- EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Swinomish TIP
- About TIPs