PM2.5 AQI Map

01/02 18:56

AQI over time ◄   ►

192 outdoor sensors returned data in the selected region, of which 115 were used for coloring after filtering for confidence in PM2.5 measurement and location rating. Click on map markers for specific sensor data.

Data retrieved on 01/02/25 18:56:19 PST

• Purple Air API used to retrieve sensor data, see circle markers on map.
• Mapping and tiles provided by Leaflet and OpenStreetMap
• Map AQI and colors estimated by Ordinary Kriging with sensor data
• AQI values over 300 color changed from  maroon  to  darkmagenta 
• Sensor markers colored per table below
• -121.74 to -120.78 | 43.63 to 44.42 were used for longitude | latitude coordinate bounds

The following table was used to calculate AQI from PM2.5 concentrations; 30 minute concentration averages were used. All concentrations greater than 325.4 µg/m³ are reported to have an AQI of 501.

EPA AQI Basics

Ordinary Kriging calculated using the "hole-effect" variogram model with PyKrige. The variance plot approximates uncertainty in the map's AQI shading.