RANKABLE EPA COUNTY AQI
Air Quality in ZIP 20009 - Washington, District of Columbia
County-derived EPA air-quality evidence connected locally through National Data System.
Median AQI
45.0
Maximum AQI
101.0
Good-air-quality days
68.13%
Average PM2.5
6.547 ug/m3
NDS Air Quality Score
43.55
U.S. County Rank
662 of 1,049
Percentile
36.74
Grade
D
What the data means
ZIP 20009 is connected to governed EPA county-level air-quality evidence for District of Columbia.
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.