***http://www.epa.gov/airquality/particlepollution/2012/decfsstandards.pdf
***http://www.epa.gov/airnow/aqi_brochure_02_14.pdf
美国十个雾霾最严重的城市, 加州(CA)占了大多数.
2014年雾霾最严重的十个美国城市(按臭氧排名)
#1: Los Angeles-Long Beach, CA
#2: Visalia-Porterville-Hanford, CA
#3: Bakersfield, CA#4: Fresno-Madera, CA
#5: Sacramento-Roseville, CA
#6: Houston-The Woodlands, TX
#7: Modesto-Merced, CA
#8: Washington-Baltimore-Arlington, DC-MD-VA-WV-PA
#8: Dallas-Fort Worth, TX-OK
#10: Las Vegas-Henderson, NV-AZ
2014年雾霾最严重的十个美国城市(按年均PM浓度排名)
#1: Fresno-Madera, CA
#2: Visalia-Porterville-Hanford, CA
#3: Los Angeles-Long Beach, CA
#3: Bakersfield, CA
#5: Modesto-Merced, CA
#6: Pittsburgh-New Castle-Weirton, PA-OH-WV
#7: El Centro, CA
#8: Phoenix-Mesa-Scottsdale, AZ
#8: St. Louis-St. Charles-Farmington, MO-IL
#8: El Paso-Las Cruces, TX-NM
2014年雾霾最严重的十个美国城市(按短期峰值PM浓度排名)
#1: Fresno-Madera, CA
#2: Visalia-Porterville-Hanford, CA
#3: Bakersfield, CA
#4: Los Angeles-Long Beach, CA
#5: Modesto-Merced, CA
#6: Pittsburgh-New Castle-Weirton, PA-OH-WV
#7: Fairbanks, AK
#8: Salt Lake City-Provo-Orem, UT
#9: El Paso-Las Cruces, TX-NM
#10: San Jose-San Francisco-Oakland, CA
我住的地方目前PM2.5 reading 是68
网上很容易查到国内的数值,现在北京市166, shanghai 157,广州只有50!