RANKABLE EPA COUNTY AQI
Air Quality in ZIP 04102 - Portland, Maine
County-derived EPA air-quality evidence connected locally through National Data System.
Median AQI
39.0
Maximum AQI
136.0
Good-air-quality days
74.01%
Average PM2.5
6.804 ug/m3
NDS Air Quality Score
45.53
U.S. County Rank
628 of 1,049
Percentile
39.98
Grade
D
What the data means
ZIP 04102 is connected to governed EPA county-level air-quality evidence for Cumberland.
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.