Air Quality Plans

Owens Valley PM₁₀ SIP Mono Basin PM₁₀ SIP Coso PM₁₀ SIP Mammoth Lakes AQMP

The District has four National Ambient Air Quality Standards (NAAQS) area designations. The Mammoth Lakes and Coso Junction planning areas are both PM10 maintenance areas, having been redesignated as attainment. The Mono Basin and Owens Valley planning areas remain PM10 nonattainment areas. Each area has a State Implementation Plan (SIP) or Maintenance Plan to implement, maintain, and enforce the NAAQS.