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.

07/09
07/10
07/11
07/12
07/13
07/14
07/15

San Joaquin

Stockton-Hazelton 43 (O3-8) 41 (O3-8) 54 (O3-8) 48 (O3-8) 40 (O3-8) 41 (O3-8) 41 (O3-8)

Manteca 23 (PM10) 31 (PM10) 25 (PM25) 29 (PM25) 34 (PM10) 30 (PM10) 21 (PM25)

Tracy-Airport 64 (O3-8) 43 (O3-8) 90 (O3-8) 80 (O3-8) 71 (O3-8) 42 (O3-8) 45 (O3-8)

Stanislaus

Modesto-14th 49 (O3-8) 47 (O3-8) 100 (O3-8) 87 (O3-8) 47 (O3-8) 47 (O3-8) 49 (O3-8)

Turlock 61 (O3-8) 54 (O3-8) 115 (O3-8) 108 (O3-8) 54 (O3-8) 54 (O3-8) 58 (O3-8)

Merced

Merced-Coffee 54 (O3-8) 58 (O3-8) 97 (O3-8) 93 (O3-8) 58 (O3-8) 64 (O3-8) 47 (O3-8)

Madera

Madera-City 61 (O3-8) 64 (O3-8) 74 (O3-8) 80 (O3-8) 74 (O3-8) 64 (O3-8) 44 (O3-8)

Madera 44 (O3-8) 50 (O3-8) 64 (O3-8) 77 (O3-8) 64 (O3-8) 51 (O3-8) 43 (O3-8)

Fresno

Fresno-SSP 77 (O3-8) 87 (O3-8) 84 (O3-8) 80 (O3-8) 93 (O3-8) 87 (O3-8) 48 (O3-8)

Clovis 64 (O3-8) 105 (O3-8) 97 (O3-8) 77 (O3-8) 93 (O3-8) 87 (O3-8) 43 (O3-8)

Fresno-Garland 74 (O3-8) 108 (O3-8) 80 (O3-8) 74 (O3-8) 84 (O3-8) 80 (O3-8) 43 (O3-8)

Fresno-Drummond 67 (O3-8) 100 (O3-8) 71 (O3-8) 67 (O3-8) 77 (O3-8) 84 (O3-8) 44 (O3-8)

Parlier 80 (O3-8) 122 (O3-8) 93 (O3-8) 58 (O3-8) 93 (O3-8) 101 (O3-8) 61 (O3-8)

Tranquillity 58 (O3-8) 50 (O3-8) 77 (O3-8) 90 (O3-8) 74 (O3-8) 47 (O3-8) 48 (O3-8)

Huron 25 (PM25) 33 (PM25) 25 (PM25) 33 (PM25) 42 (PM25) 46 (PM25) 33 (PM25)

Kings

Hanford 80 (O3-8) 87 (O3-8) 77 (O3-8) 80 (O3-8) 77 (O3-8) 67 (O3-8) 44 (O3-8)

Corcoran 65 (PM10) 51 (PM10) 51 (PM10) 57 (PM10) 57 (PM10) 50 (PM10) 42 (PM25)

Tulare

Visalia, Church 108 (O3-8) 112 (O3-8) 100 (O3-8) 93 (O3-8) 87 (O3-8) 101 (O3-8) 58 (O3-8)

Porterville 97 (O3-8) 67 (O3-8) 87 (O3-8) 84 (O3-8) 74 (O3-8) 80 (O3-8) 59 (PM25)

Ash Mountain-SNP

Lower Kaweah-SNP 47 (O3-8) 100 (O3-8) 108 (O3-8) 71 (O3-8) 44 (O3-8) 133 (O3-8) 119 (O3-8)

Kern

Shafter 50 (O3-8) 47 (O3-8) 97 (O3-8) 90 (O3-8) 80 (O3-8) 77 (O3-8) 54 (O3-8)

Oildale 67 (O3-8) 54 (O3-8) 115 (O3-8) 101 (O3-8) 93 (O3-8) 90 (O3-8) 64 (O3-8)

Bakersfield-Calif 67 (O3-8) 58 (O3-8) 122 (O3-8) 108 (O3-8) 105 (O3-8) 90 (O3-8) 64 (O3-8)

Bakersfield-Muni 45 (O3-8) 67 (O3-8) 77 (O3-8) 50 (O3-8) 108 (O3-8) 87 (O3-8) 71 (O3-8)

Edison 80 (O3-8) 84 (O3-8) 143 (O3-8) 119 (O3-8) 112 (O3-8) 100 (O3-8) 93 (O3-8)

Arvin-DiGiorgio 64 (O3-8) 87 (O3-8) 112 (O3-8) 108 (O3-8) 115 (O3-8) 108 (O3-8) 84 (O3-8)

Maricopa 61 (O3-8) 50 (O3-8) 105 (O3-8) 100 (O3-8) 97 (O3-8) 80 (O3-8) 61 (O3-8)

Lebec 25 (PM25) 38 (PM25) 38 (PM25) 29 (PM25) 46 (PM25) 42 (PM25) 50 (PM25)

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 2
Federal 1-Hr Ozone 0

O3-1hr (ppb) 109

PM10 State 24-hr 84
State 1-Hr Ozone 9

O3-8hr (ppb) 90

PM2.5 Federal 2006 24-hr 16
Federal 2008 8-Hr Ozone 21

PM 10 (µg/m³) 178
PM2.5 Federal 1997 24-hr

PM2.5 Federal 1997 24-hr 4
Federal 1997 8-Hr Ozone 1

PM 2.5 (µg/m³) 103

State 1997 8-Hr Ozone 41
¹Data affected by smoke, high winds, fireworks, and etc. and which exceeded a federal standard are denoted with an ‘x’ in
the table above. Values marked with an ‘x’ are not included in the tallies above.
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Monday, July 16, 2018 Page 1 of 1