Code Green - Air quality expected to be in good range.
Code Yellow - Moderate air quality expected. Citizens are advised to consolidate trips, limit idling while driving and conserve electricity.
Code Orange - Moderately unhealthy air in the area. Citizens should carpool if possible and limit exercise outside. People with respiratory ailments should limit activities.
Code Red - Unhealthy air. Citizens should limit any outdoor activities, particularly those involving children and the elderly; avoid mowing lawns and limit driving.