Juneau - Particulate Matter


Photo by Glynn Cater

EPA designated the Mendenhall Valley area of Juneau, Alaska as a moderate non-attainment area for the National Ambient Air Quality Standard (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to 10 micrometers (PM10) in 1991 based on violations of the 24-hour PM10 standard that occurred throughout the 1980s.

The EPA fully approved Alaska's moderate PM10 non-attainment area plan as a State Implementation Plan (SIP) revision for the Mendenhall Valley PM10 non-attainment area in 1994 (Federal Register: March 24, 1994).



There have been no measured violations of the PM10 standard since 1994. EPA has approved a Limited Maintenance Plan (LMP) for the Mendenhall Valley area of Juneau that provides contingency plans if Juneau experiences a PM10 problem inthe future. Juneau is designated as in attainment for PM10.

Attainment Plan (SIP)

EPA Approved PM10 Attainment Plan (8/13/93)

EPA Approved Limited Maintenance Plan (5/5/09)


Graphs of PM10 Exceedances


DEC-Juneau Air Monitoring Plan

Juneau Transit Center Fact Sheet

Quick Links

ANPMS Contacts

Air Pollution in Alaska


Of Interest

Division of Air Quality