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.

09/19
09/20
09/21
09/22
09/23
09/24
09/25

San Joaquin

Stockton-Hazelton 33 (PM25) 27 (O3-8) 34 (O3-8) 35 (O3-8) 34 (O3-8) 38 (O3-8) 5 (CO)

Manteca 26 (PM10) 23 (PM10) 19 (PM10) 28 (PM10) 41 (PM10) 24 (PM10) 38 (PM10)

Tracy-Airport 37 (O3-8) 32 (O3-8) 34 (O3-8) 34 (O3-8) 33 (O3-8) 35 (O3-8) 40 (O3-8)

Stanislaus

Modesto-14th 40 (O3-8) 33 (O3-8) 36 (O3-8) 41 (O3-8) 39 (O3-8) 40 (O3-8) 45 (O3-8)

Turlock 40 (O3-8) 31 (O3-8) 36 (O3-8) 41 (O3-8) 36 (O3-8) 40 (O3-8) 45 (O3-8)

Merced

Merced-Coffee 40 (O3-8) 32 (O3-8) 34 (O3-8) 42 (O3-8) 37 (O3-8) 42 (O3-8) 33 (PM25)

Madera

Madera-City 44 (O3-8) 40 (PM10) 37 (O3-8) 43 (O3-8) 39 (O3-8) 44 (O3-8) 47 (O3-8)

Madera 42 (O3-8) 35 (O3-8) 36 (O3-8) 41 (O3-8) 39 (O3-8) 43 (O3-8) 48 (O3-8)

Fresno

Fresno-SSP 45 (O3-8) 38 (O3-8) 40 (O3-8) 44 (O3-8) 42 (O3-8) 44 (O3-8) 49 (O3-8)

Clovis 42 (O3-8) 44 (PM10) 33 (O3-8) 36 (O3-8) 43 (O3-8) 44 (O3-8) 49 (O3-8)

Fresno-Garland 46 (O3-8) 40 (O3-8) 40 (O3-8) 44 (O3-8) 44 (O3-8) 46 (O3-8) 58 (O3-8)

Fresno-Drummond 42 (O3-8) 38 (O3-8) 35 (O3-8) 40 (O3-8) 39 (O3-8) 43 (O3-8) 46 (O3-8)

Parlier 46 (O3-8) 45 (O3-8) 39 (O3-8) 42 (O3-8) 43 (O3-8) 46 (O3-8) 54 (O3-8)

Tranquillity 41 (O3-8) 32 (O3-8) 37 (O3-8) 40 (O3-8) 36 (O3-8) 41 (O3-8) 44 (O3-8)

Huron 38 (PM25) 33 (PM25) 17 (PM25) 17 (PM25) 25 (PM25) 17 (PM25) 25 (PM25)

Kings

Hanford 55 (PM10) 46 (PM10) 39 (O3-8) 43 (O3-8) 44 (PM10) 46 (O3-8) 53 (PM10)

Corcoran 68 (PM10) 57 (PM10) 31 (PM10) 39 (PM10) 52 (PM10) 52 (PM10) 54 (PM10)

Tulare

Visalia, Church 58 (PM10) 61 (O3-8) 40 (O3-8) 42 (O3-8) 44 (O3-8) 47 (O3-8) 64 (O3-8)

Porterville 43 (O3-8) 45 (O3-8) 35 (O3-8) 38 (O3-8) 38 (O3-8) 44 (O3-8) 48 (O3-8)

Ash Mountain-SNP 53 (PM25) 54 (O3-8) 42 (PM25) 50 (PM25) 55 (PM25) 53 (PM25) 67 (O3-8)

Lower Kaweah-SNP 43 (O3-8) 48 (O3-8) 38 (O3-8) 42 (O3-8) 46 (O3-8) 48 (O3-8) 58 (O3-8)

Kern

Shafter 43 (O3-8) 44 (O3-8) 39 (O3-8) 41 (O3-8) 41 (O3-8) 49 (O3-8) 54 (O3-8)

Oildale 54 (PM10) 58 (PM10) 40 (O3-8) 43 (O3-8) 43 (O3-8) 50 (O3-8) 64 (O3-8)

Bakersfield-Calif 48 (O3-8) 51 (O3-8) 42 (O3-8) 46 (O3-8) 46 (O3-8) 61 (O3-8) 71 (O3-8)

Bakersfield-Muni 46 (O3-8) 46 (O3-8) 37 (O3-8) 40 (O3-8) 41 (O3-8) 47 (O3-8) 51 (O3-8)

Edison 50 (O3-8) 50 (O3-8) 38 (O3-8) 43 (O3-8) 44 (O3-8) 48 (O3-8) 61 (O3-8)

Arvin-DiGiorgio 44 (O3-8) 54 (O3-8) 38 (O3-8) 44 (O3-8) 46 (O3-8) 46 (O3-8) 54 (O3-8)

Maricopa 41 (O3-8) 47 (O3-8) 36 (O3-8) 42 (O3-8) 45 (O3-8) 49 (O3-8) 64 (O3-8)

Lebec 29 (PM25) 25 (PM25) 29 (PM25) 29 (PM25) 25 (PM25) 17 (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) 113

PM10 State 24-hr 122
State 1-Hr Ozone 39

O3-8hr (ppb) 99

PM2.5 Federal 2006 24-hr 8
Federal 2008 8-Hr Ozone 78

PM 10 (µg/m³) 133
PM2.5 Federal 1997 24-hr

PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 25

PM 2.5 (µg/m³) 51

State 1997 8-Hr Ozone 105
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 26, 2017 Page 1 of 1