Goldstream Valley PM2.5 AQI
The plot below shows the last twenty four hours of PurpleAir data for all stations within 5 miles of the DW1454 weather station. The top plot shows the outliers, stations reporting data more than two standard deviations from the mean (using log-transformed data) for that period. The bottom plot shows the data with the outliers removed. On that plot the bars represent the half-hourly minimum and maximum AQI, the circles are the mean, the horizonal lines are median, and the blue line is a smoothed curve through the means.
Plots are updated on the server every half hour.