Data Dictionary

Column Type Label Description
quarter_year text

Violation quarter and year

geography text

Location of violations

ozone_days_sensitive numeric

Number of days ground ozone was unhealthy for sensitive groups

ozone_days_unhealthy numeric

Number of days ground ozone was at unhealthy levels

ozone_days_very_unhealthy numeric

Number of days ground ozone was at very unhealthy levels

ozone_days_hazardous numeric
pm_days_sensitive numeric

Number of days PM2.5 was unhealthy for sensitive groups

pm_days_unhealthy numeric

Number of days PM2.5 was at unhealthy levels

pm_days_very_unhealthy numeric

Number of days PM2.5 was at very unhealthy levels

pm_days_hazardous numeric