Label AQI Values

aqi_color() returns the color that corresponds with the given AQI value.

aqi_descriptor() converts the given AQI value(s) into a descriptive string.

Usage

aqi_color(aqi)

aqi_descriptor(aqi)

Arguments

aqi

A vector of AQI values (whole numbers, NA allowed)

Value

aqi_color() returns a character vector of RGB hex strings

aqi_descriptor() returns a character vector

Details

The AQI scale nominally tops out at 500, but AirNow reports higher values during severe smoke events. Values above 500 are treated as Hazardous. NA inputs give NA outputs. Negative values (including AirNow's -1 sentinel for a categorical forecast) give NA with a warning.

Examples

aqi_color(35)
#> [1] "#00E400"
aqi_color(c(35, NA, 874))
#> [1] "#00E400" NA        "#7E0023"
aqi_descriptor(35)
#> [1] "Good"