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.

09/18
09/19
09/20
09/21
09/22
09/23
09/24

San Joaquin

Stockton-Hazelton 38 (O3-8) 53 (PM25) 55 (PM25) 101 (O3-8) 67 (O3-8) 43 (O3-8) 53 (PM25)

Manteca 28 (PM10) 40 (PM10) 54 (PM10) 55 (PM10) 42 (PM25) 21 (PM25) 43 (PM10)

Tracy-Airport 46 (O3-8) 64 (O3-8) 54 (PM10) 126 (O3-8) 100 (O3-8) 49 (O3-8) 47 (O3-8)

Stanislaus

Modesto-14th 46 (O3-8) 49 (O3-8) 56 (PM10) 112 (O3-8) 112 (O3-8) 44 (O3-8) 49 (O3-8)

Turlock 46 (O3-8) 54 (O3-8) 54 (O3-8) 136 (O3-8) 112 (O3-8) 44 (O3-8) 54 (O3-8)

Merced

Merced-Coffee 51 (O3-8) 71 (O3-8) 100 (O3-8) 101 (O3-8) 105 (O3-8) 44 (O3-8) 51 (O3-8)

Madera

Madera-City 58 (PM10) 63 (PM10) 100 (O3-8) 105 (O3-8) 90 (O3-8) 54 (O3-8) 61 (PM10)

Madera 49 (O3-8) 54 (O3-8) 93 (O3-8) 105 (O3-8) 90 (O3-8) 61 (O3-8) 50 (O3-8)

Fresno

Fresno-SSP 50 (O3-8) 58 (O3-8) 100 (O3-8) 122 (O3-8) 105 (O3-8) 74 (O3-8) 61 (O3-8)

Clovis 53 (PM10) 71 (O3-8) 64 (O3-8) 150 (O3-8) 136 (O3-8) 87 (O3-8) 93 (O3-8)

Fresno-Garland 51 (PM10) 74 (O3-8) 115 (O3-8) 151 (O3-8) 133 (O3-8) 93 (O3-8) 54 (PM10)

Fresno-Drummond 61 (O3-8) 71 (O3-8) 101 (O3-8) 143 (O3-8) 126 (O3-8) 100 (O3-8) 87 (O3-8)

Parlier 74 (O3-8) 84 (O3-8) 90 (O3-8) 129 (O3-8) 129 (O3-8) 97 (O3-8) 97 (O3-8)

Tranquillity 45 (O3-8) 48 (O3-8) 49 (O3-8) 80 (O3-8) 90 (O3-8) 49 (O3-8) 58 (O3-8)

Huron 29 (PM25) 25 (PM25) 42 (PM25) 42 (PM25) 38 (PM25) 17 (PM25) 29 (PM25)

Kings

Hanford 71 (PM10) 71 (PM10) 84 (O3-8) 136 (O3-8) 122 (O3-8) 67 (O3-8) 74 (PM10)

Corcoran 64 (PM10) 66 (PM10) 79 (PM10) 93 (PM10) 80 (PM10) 52 (PM10) 83 (PM10)

Tulare

Visalia, Church 72 (PM10) 74 (O3-8) 87 (O3-8) 112 (O3-8) 129 (O3-8) 77 (O3-8) 69 (PM10)

Porterville 67 (O3-8) 74 (O3-8) 93 (O3-8) 108 (O3-8) 122 (O3-8) 74 (O3-8) 54 (O3-8)

Ash Mountain-SNP 97 (O3-8) 100 (O3-8) 112 (O3-8) 97 (O3-8) 46 (O3-8) 74 (O3-8) 71 (O3-8)

Lower Kaweah-SNP 101 (O3-8) 101 (O3-8) 108 (O3-8) 101 (O3-8) 42 (O3-8) 51 (O3-8) 67 (O3-8)

Kern

Shafter 61 (O3-8) 61 (O3-8) 90 (O3-8) 115 (O3-8) 108 (O3-8) 74 (O3-8) 67 (O3-8)

Oildale 80 (O3-8) 77 (O3-8) 112 (O3-8) 133 (O3-8) 126 (O3-8) 84 (O3-8) 64 (O3-8)

Bakersfield-Calif 84 (O3-8) 71 (O3-8) 122 (O3-8) 129 (O3-8) 129 (O3-8) 90 (O3-8) 61 (O3-8)

Bakersfield-Muni 54 (O3-8) 61 (O3-8) 112 (O3-8) 112 (O3-8) 119 (O3-8) 87 (O3-8) 47 (O3-8)

Edison 101 (O3-8) 97 (O3-8) 136 (O3-8) 147 (O3-8) 159 (O3-8) 101 (O3-8) 71 (O3-8)

Arvin-DiGiorgio 97 (O3-8) 84 (O3-8) 122 (O3-8) 150 (O3-8) 119 (O3-8) 105 (O3-8) 67 (O3-8)

Maricopa 80 (O3-8) 77 (O3-8) 112 (O3-8) 119 (O3-8) 119 (O3-8) 80 (O3-8) 61 (O3-8)

Lebec 33 (PM25) 33 (PM25) 29 (PM25) 21 (PM25) 21 (PM25) 25 (PM25)

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) 121

PM10 State 24-hr 152
State 1-Hr Ozone 35

O3-8hr (ppb) 90

PM2.5 Federal 2006 24-hr 21
Federal 2008 8-Hr Ozone 66

PM 10 (µg/m³) 153
PM2.5 Federal 1997 24-hr

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

PM 2.5 (µg/m³) 103

State 1997 8-Hr Ozone 100
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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Tuesday, September 25, 2018 Page 1 of 1