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‘Unhealthy for Sensitive Groups’ Air-Quality Index

All About the “Unhealthy for Sensitive Groups” Air-Quality Index Level

  • We classify conditions unhealthy for sensitive groups if

    • Short-term (one-hour) concentrations are 89–138 µg/m3
    • Eight-hour average concentrations are 51–79 µg/m3
    • 24-hour average concentrations are 36–55 µg/m3
  • The AQI range for unhealthy for sensitive groups air quality is 101–150

  • The visibility during unhealthy for sensitive groups air quality is usually 3–5 miles

  • Health effects expected

    • Increasing likelihood of respiratory or cardiac symptoms
    • Aggravation of heart or lung disease
  • Caution statements?

    • People with heart or lung disease, the elderly, children, and pregnant women should limit prolonged or heavy exertion
    • Limit time spent outdoors, physical exertion
    • People with asthma should follow asthma management plan
  • Protective actions?

    • Reduce exposure to particles by keeping doors and windows closed, seal large gaps as much as possible
    • Avoid using exhaust fans
    • Avoid indoor sources of pollutants, including tobacco smoke, heating with wood stoves and kerosene heaters, frying or broiling foods, burning candles, vacuuming, and using paints, solvents, cleaning products, and adhesives
Last modified on April 21st, 2017
Posted on April 21st, 2017