AQI by Site

AQI is based on measured data at each site. Some sites measure only ozone or only PM-2.5. In

summer only those sites with ozone measurements estimate the AQI correctly, and in winter only

those sites with PM-2.5 measurements estimate the AQI correctly. The information in this

report is based on preliminary data and is subject to change. The real-time PM-10/PM-2.5

monitoring eqiupment is used for air quality forecasting and trend analysis.

06/26
06/27
06/28
06/29
06/30
07/01
07/02

San Joaquin

Stockton-Hazelton 49 (PM25) 54 (O3-8) 67 (O3-8) 71 (O3-8) 58 (O3-8) 52 (PM25) 45 (PM25)

Tracy-Airport 84 (O3-8) 100 (O3-8) 104 (O3-8) 90 (O3-8) 116 (O3-8) 80 (O3-8) 64 (O3-8)

Stanislaus

Modesto-14th 58 (O3-8) 97 (O3-8) 101 (O3-8) 87 (O3-8) 106 (O3-8) 77 (O3-8) 71 (O3-8)

Turlock 77 (O3-8) 111 (O3-8) 109 (O3-8) 101 (O3-8) 111 (O3-8) 111 (O3-8) 93 (O3-8)

Merced

Merced-Coffee 77 (O3-8) 97 (O3-8) 111 (O3-8) 111 (O3-8) 111 (O3-8) 104 (O3-8) 101 (O3-8)

Madera

Madera 61 (O3-8) 97 (O3-8) 111 (O3-8) 154 (O3-8) 101 (O3-8) 97 (O3-8) 74 (O3-8)

Fresno

Clovis 71 (O3-8) 127 (O3-8) 161 (O3-8) 150 (O3-8) 122 (O3-8) 132 (O3-8) 111 (O3-8)

Fresno-Drummond 61 (O3-8) 129 (O3-8) 161 (O3-8) 154 (O3-8) 122 (O3-8) 111 (O3-8) 106 (O3-8)

Fresno-First 80 (O3-8) 127 (O3-8) 172 (O3-8) 164 (O3-8) 127 (O3-8) 127 (O3-8) 111 (O3-8)

Fresno-SSP 64 (O3-8) 111 (O3-8) 142 (O3-8) 172 (O3-8) 116 (O3-8) 111 (O3-8) 93 (O3-8)

Parlier 51 (O3-8) 109 (O3-8) 114 (O3-8) 104 (O3-8) 97 (O3-8) 109 (O3-8) 93 (O3-8)

Kings

Corcoran 64 (O3-8) 109 (O3-8) 106 (O3-8) 106 (O3-8) 87 (O3-8) 101 (O3-8) 101 (O3-8)

Hanford

Tulare

Ash Mountain-SNP 116 (O3-8) 127 (O3-8) 142 (O3-8) 93 (O3-8) 119 (O3-8) 140 (O3-8) 122 (O3-8)

Lower Kaweah-SNP 77 (O3-8) 64 (O3-8) 67 (O3-8) 54 (O3-8) 74 (O3-8) 90 (O3-8) 80 (O3-8)

Visalia, Church 77 (O3-8) 145 (O3-8) 124 (O3-8) 127 (O3-8) 111 (O3-8) 111 (O3-8) 114 (O3-8)

Kern

Arvin 97 (O3-8) 150 (O3-8) 147 (O3-8) 116 (O3-8) 122 (O3-8) 166 (O3-8) N/A ()

Bakersfield-Calif 54 (O3-8) 116 (O3-8) 129 (O3-8) 93 (O3-8) 84 (O3-8) 116 (O3-8) 100 (O3-8)

Bakersfield-Gold 46 (O3-8) 101 (O3-8) 114 (O3-8) 67 (O3-8) 71 (O3-8) 101 (O3-8) 84 (O3-8)

Edison 77 (O3-8) 127 (O3-8) 140 (O3-8) 101 (O3-8) 100 (O3-8) 137 (O3-8) 111 (O3-8)

Maricopa 74 (O3-8) 116 (O3-8) 106 (O3-8) 93 (O3-8) 90 (O3-8) 132 (O3-8) 111 (O3-8)

Oildale 58 (O3-8) 116 (O3-8) 132 (O3-8) 84 (O3-8) 100 (O3-8) 119 (O3-8) 97 (O3-8)

Shafter 46 (O3-8) 80 (O3-8) 87 (O3-8) 58 (O3-8) 84 (O3-8) 109 (O3-8) 93 (O3-8)

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 0
Federal 1-Hr Ozone 0

O3-1hr (ppb) 119
PM10 State 24-hr 70
State 1-Hr Ozone 19

O3-8hr (ppb) 104
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 30

PM 10 (µg/m³) 113
PM2.5 Federal 1997 24-hr 7
Federal 1997 8-Hr Ozone 17

PM 2.5 (µg/m³) 76
State 1997 8-Hr Ozone 39
¹Some of the days over the standards shown above may be the result of “Natural Events” such as extreme
wind episodes, or “Exceptional Events” such as wildfires and would not count as violations of the federal
standard.
Friday, July 03, 2009 Page 1 of 1