Our monitoring data has been analyzed on a hexagon grid of the city. Each hexagon is the length of a half city block. Use the tabs to switch between different data views. Use the map key in the bottom right corner of the map to better understand the data. Click a hexagon for more information about that area.
This map shows the percent of PM2.5 readings 35 µg/m³ (micrograms per cubic meter) and above within each hexagon. Readings of 35 µg/m³ and above are considered unhealthy, and can pose great risk to those with respiratory illnesss and the general population (US EPA standard).
This map shows the percent of PM2.5 readings 12 µg/m³ (micrograms per cubic meter) and below within each hexagon. Readings of 12 µg/m³ and below pose little to no risk to the general population (US EPA standard).
This map shows the average concentration of all PM2.5 data points within each hexagon. The darker the hexagon's color, the less healthy the average air quality reading in that area is.
This map compares our PM2.5 air quality readings with Center for Disease Control (CDC) asthma and chronic obstructive pulmonary disease (COPD) rate findings. Areas with both poor air quality and high incidents of asthma and COPD are illustrated in dark brown.