AIRNOW - Surface Monitoring Data for PM2.5 and Ozone
Description: AIRNOW is an EPA program in collaboration with the States to gather and distribute hourly near-realtime data from several hundred continuous PM2.5 and ozone monitors. Parameters: PM2.5, Ozone
The AirNOW data are obtained from the EPA AirNOW website (link). The data for each day is contained in an ASCII OBS file. In DataFed these OBS files are compiled and cached in a binary data cube which allows fast access, particularly along the time axis.
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