Region:
Data filtered for selected region
Recent Air Quality Trend
Historical air quality monitoring trends and analysis for National
Hourly Avg, Past 2 Weeks
The average number of devices reporting USG or worse over the past two weeks of hourly data—
Hourly Peak, Past 2 Weeks
The highest number of devices reporting USG or worse in a single hour in the past two weeks.—
Trend
Compares the average hourly USG+ device count from the first half of the available data to the second half. A rise of more than 10% is Worsening; a drop of more than 10% is Improving; otherwise Stable.—