Eagle River, Alaska was designated a nonattainment for PM10 (dust) in 1987 due to many unpaved roads in the area. Nearly all the gravel roads were paved in the early 1990s, which resulted in Eagle River being reclassified as moderate upon enactment of the Clean Air Act Amendments of 1990. On January 7, 2013 EPA approved a limited maintenance plan and redesignated Eagle River as attaining the PM10 standard. Eagle River is currently a limited maintenance area.
(Photo by Glynn Cater)