It’s that time of year – ozone season – Asheville Citizen-Times (blog)

Asheville Citizen-Times (blog)
It's that time of year – ozone season
Asheville Citizen-Times (blog)
The forecasts are done year-round for fine particulates (also known as PM-2.5) and in the warm-weather months for ozone, color coded from green (good) to yellow (moderate) to orange (unhealthy for sensitive groups) to red (unhealthy to be outdoors).

It’s that time of year – ozone season – Asheville Citizen-Times (blog)

Asheville Citizen-Times (blog)
It's that time of year – ozone season
Asheville Citizen-Times (blog)
The forecasts are done year-round for fine particulates (also known as PM-2.5) and in the warm-weather months for ozone, color coded from green (good) to yellow (moderate) to orange (unhealthy for sensitive groups) to red (unhealthy to be outdoors).