Children are especially at risk for health effects from exposure to wildfire smoke and ash, mostly because their lungs are still growing.
Some minor smoke or haze in the air doesn't necessarily mean outdoor activities are unsafe. Smoke can also be localized and affect different areas and communities in Eagle County throughout the day depending on the weather. Use all of these tools comprehensively to make your decision:
Using the Air Quality Index:
Green means "Good" (0-50): Great day to be active and conduct classes outdoors!
Yellow means "Moderate" (50-100): It is a good day for students to be active outside. Watch students who are unusually sensitive to air pollution.
Orange means "Unhealthy for sensitive groups" (100-150): It is an OK day for students to be active outside. Limit students to light outdoor activities or move the activities indoors.
Red means "Unhealthy" (150-200): Keep all students indoors or allow only light outdoor activity.
Real-time air quality data to determine AQI levels for Eagle County:
AirNow: This site, hosted by the EPA, includes real-time air quality data from low-cost sensors and regulatory-grade monitors, as well as wildfire incident information and smoke plumes.
Purple Air Sensor network: Purple Air sensors are low-cost sensors that can be used as an indicator of air quality conditions. To get the most accurate Purple Air readings, in the bottom left-hand corner of the map screen, select the LRAPA under "Conversion" and use the one hour average. The data they show is color-coded based on the Air Quality Index (AQI).
5 mile visibility index: Pick a landmark, such as a hillside or mountain, about 5 miles away. If that landmark is completely obstructed from view, wildfire smoke may have reached levels that are unhealthy.
Determine optimal settings for the heating, ventilation and air conditioning system (HVAC) to keep smoke from coming indoors. If possible, install high-efficiency filters.
Do not add to indoor air pollution. Do not use odor-masking sprays or burn candles in classrooms.
Use portable HEPA air cleaners in classrooms if feasible. These can be particularly helpful for schools without air conditioning that need to leave windows open for cooling.
Oregon Health Authority - Public Health Guidance: School Outdoor Activities During Wildfire Events
California Environmental Protection Agency - Guidance for Schools During Wildfire Smoke Events