RANKABLE EPA COUNTY AQI
Air Quality in ZIP 99113 - Colton, Washington
County-derived EPA air-quality evidence connected locally through National Data System.
Median AQI
20.0
Maximum AQI
97.0
Good-air-quality days
93.83%
Average PM2.5
N/A
NDS Air Quality Score
77.53
U.S. County Rank
136 of 1,049
Percentile
87.12
Grade
A
What the data means
ZIP 99113 is connected to governed EPA county-level air-quality evidence for Whitman.
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.