RANKABLE EPA COUNTY AQI
Air Quality in ZIP 99503 - Anchorage, Alaska
County-derived EPA air-quality evidence connected locally through National Data System.
Median AQI
24.0
Maximum AQI
110.0
Good-air-quality days
80.77%
Average PM2.5
3.960 ug/m3
NDS Air Quality Score
73.51
U.S. County Rank
190 of 1,049
Percentile
81.87
Grade
B
What the data means
ZIP 99503 is connected to governed EPA county-level air-quality evidence for Anchorage.
ZIP ranking note: ZIPs are not separately ranked. The rank shown on this page is the associated county rank because the EPA AQI evidence used here is county-derived.
County context
Methodology
EPA AQI evidence is county-derived. NDS connects that evidence to ZIP geography where a governed county relationship exists. NDS does not claim that EPA directly ranks ZIP codes.