RANKABLE EPA COUNTY AQI
Air Quality in ZIP 57439 - Ferney, South Dakota
County-derived EPA air-quality evidence connected locally through National Data System.
Median AQI
25.0
Maximum AQI
84.0
Good-air-quality days
87.08%
Average PM2.5
5.325 ug/m3
NDS Air Quality Score
74.19
U.S. County Rank
179 of 1,049
Percentile
82.92
Grade
B
What the data means
ZIP 57439 is connected to governed EPA county-level air-quality evidence for Brown.
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.