🇦🇺 Sydney, Australia的空气质量指数（AQI）
Sydney居民健康建议
空气质量令人满意，空气污染几乎无风险。非常适合在Sydney进行户外活动。
Sydney空气污染：详细污染物分解
如何解读空气质量指数 Sydney
Air is fresh and healthy. Safe for all outdoor activities.
Acceptable air quality, though sensitive groups should monitor comfort.
Vulnerable groups (children, elderly) should limit outdoor exertion.
Everyone begins to experience health effects. Stay indoors where possible.
Significant health impact for entire population. Emergency conditions.
Serious health alert: everyone may experience serious life-threatening effects.
Fine particles are at minimal, safe levels. Air is optimal.
Acceptable air, but haze may be present in urban areas.
Individuals with heart or lung disease should limit activity.
Particulate levels high enough to cause respiratory irritation.
Heavy haze. High risk to cardiovascular health for the public.
Lethal particulate concentrations. Critical neurological and lung risk.
Low levels of dust and coarse particles. Environment is safe.
Coarse particles may trigger coughing in sensitive groups.
Visible dust pollution. Sensitive groups should avoid heavy labor.
Widespread respiratory impacts likely for the population.
Dangerous dust and debris levels. Significant warnings issued.
Extremely high concentrations. Stay inside with filtration.
Surface ozone levels are within a safe, natural range.
Acceptable air, but sensitive individuals may feel chest tightness.
Rising ozone can trigger airway inflammation in active children.
Avoid heavy outdoor work during the hottest part of the day.
Serious lung function reduction likely across the public.
Emergency ozone levels. Risk of permanent lung tissue damage.
Nitrogen levels are optimal. Safe for everyone.
Typical background levels for high-density urban areas.
Increased risk of respiratory infections for vulnerable groups.
Significant airway inflammation likely near traffic zones.
Acute respiratory distress potential. High-risk groups stay indoors.
Toxic concentrations. Immediate health precautions required.
Carbon Monoxide levels are clean and non-toxic.
Acceptable; may affect those with specific heart conditions.
Reduced oxygen delivery to the heart may occur.
Headaches and fatigue may occur in urban canyons.
Significant cardiovascular distress. Mental confusion possible.
Lethal potential. Immediate risk of neurological collapse.
Optimal air quality with no sulfur detection.
Acceptable air; minor odors possible near industry.
Bronchoconstriction possible for active asthmatics.
Respiratory distress likely for the wider population.
Significant wheezing and shortness of breath likely.
Extreme respiratory danger. Significant life risk.
这个AQI是如何计算的？
上面显示的主要空气质量指数（AQI）是根据PM2.5（细颗粒物）浓度，使用美国EPA线性插值公式计算的。
- 当前PM2.5： 15.15 µg/m³
- 计算： 您的城市属于“良好”类别（类别1）。
注意：虽然监测多种污染物（O3、NO2、SO2），但PM2.5被用作主要指数值的“驱动因素”，因为它通常代表最高的健康风险。
常见问题
Sydney空气污染的主要原因是什么？
Sydney的污染主要受15.5公里/小时的NNE风、本地交通排放和工业活动影响，这些因素导致当前PM2.5浓度为15.15 µg/m³。
今天Sydney的AQI安全吗？
今天的AQI为62，属于良好类别。这意味着空气质量对普通人群良好。