cloud1025 wrote:
我先說對於這個議題...(恕刪)
爬個文你的問題就有解答，71.72樓
不管是英國的DAQI還是美國的AQI，顏色都只是利於區別
唯一的差異只是顏色的管理
Q. USEPA的AQI是97年的老舊標準？
A: Air Quality Index - A Guide to Air Quality and Your Health (https://www3.epa.gov/airnow/aqi_brochure_02_14.pdf)
2014年版本何來老舊？
Q: 紫爆降低標準？
A: 英國環境部 DAQI分類 (https://uk-air.defra.gov.uk/air-pollution/daqi)
Boundaries Between Index Points for Each Pollutant
High(PM2.5 54-70µgm3)：7-9 : Adults and children with lung problems, and adults with heart problems, should reduce strenuous physical exertion, particularly outdoors, and particularly if they experience symptoms. People with asthma may find they need to use their reliever inhaler more often. Older people should also reduce physical exertion.
Very High(PM2.5 >71µgm3)：10: Adults and children with lung problems, adults with heart problems, and older people, should avoid strenuous physical activity. People with asthma may find they need to use their reliever inhaler more often.
對照美國AQI
101-150: Unhealthy for Sensitive Groups: The following groups should reduce prolonged or heavy outdoor exertion:
• People with lung disease, such as asthma
• Children and older adults
• People who are active outdoors
151-200:Unhealthy ：The following groups should avoid prolonged or heavy outdoor exertion:
• People with lung disease, such as asthma
• Children and older adults
• People who are active outdoors
Everyone else should limit prolonged outdoor exertion.
台灣環保署AQI
101～150: 對敏感族群不健康: (PM2.5 35.5 - 54.4µg/m3): 1.有心臟、呼吸道及心血管疾病患者、孩童及老年人，建議減少體力消耗活動及戶外活動，必要外出應配戴口罩。 2.具有氣喘的人可能需增加使用吸入劑的頻率。
151～200:對所有族群不健康: (PM2.5 54.5 - 150.4µg/m3): 1.有心臟、呼吸道及心血管疾病患者、孩童及老年人，建議留在室內並減少體力消耗活動，必要外出應配戴口罩。2.具有氣喘的人可能需增加使用吸入劑的頻率。
根據英國的標準PM2.5要>71µg/m3才要"避免"戶外的活動，低於71建議"減少"戶外活動
台灣的AQI仿照美國AQI，>54.5µg/m3就建議避免戶外的活動，低於54.5就建議"減少"戶外活動
顏色的管理只是一個共識，以前看到紫色就是PM2.5 >71µg/m3，盡量避免戶外活動
現在看到紅色就是PM2.5 >54.5µg/m3，也是盡量避免戶外活動
到底是誰的要求是降低標準?
