2017 Air Quality Data Summary

Figure 1: Days Exceeding the PM2.5 Health Goal at One or More Monitoring Sites

Map 2 shows the 98th percentile of the 3-year average of daily PM2.5 concentrations. The map includes
only those monitoring sites with three years of complete data from 2015 to 2017. This map
incorporates data collected from federal reference, federal equivalent, and nephelometer estimate
methods.

Particulate Matter – PM2.5

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