AQI The meaning ofThe colors usedGuidelines for impact protection. 0-50 Good quality. BlueThere are no health effects. 51-100 Medium qualityGreen There are no health effects. 101-200 Have an impact on health.YellowPatients with respiratory diseases. Should avoid exercise outside the building.The general public, especially children and the elderly. The activity should not be made outside the building for a long time. 201-300 There are many health effects.OrangePatients with respiratory diseases. Should avoid outdoor activity. The general public, especially children and the elderly should limit outdoor exercise. More than 300 Danger. Red Individuals should avoid outdoor exercise For patients with respiratory disease. Should be contained within the building.