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.

12/07
12/08
12/09
12/10
12/11
12/12
12/13

San Joaquin

Stockton-Hazelton 74 (PM25) 93 (PM25) 93 (PM25) 99 (PM25) 99 (PM25) 70 (PM25) 99 (PM25)

Manteca 64 (PM25) 93 (PM25) 72 (PM25) 78 (PM25) 64 (PM25) 66 (PM25) 93 (PM25)

Tracy-Airport 33 (PM25) 74 (PM25) 59 (PM25) 66 (PM25) 33 (PM25) 50 (PM25) 62 (PM25)

Stanislaus

Modesto-14th 72 (PM25) 89 (PM25) 72 (PM25) 91 (PM25) 68 (PM25) 59 (PM25) 89 (PM25)

Turlock 76 (PM25) 93 (PM25) 80 (PM25) 93 (PM25) 74 (PM25) 72 (PM25) 95 (PM25)

Merced

Merced-Coffee 64 (PM25) 66 (PM25) 85 (PM25) 91 (PM25) 78 (PM25) 74 (PM25) 87 (PM25)

Madera

Madera-City 68 (PM25) 70 (PM25) 76 (PM25) 80 (PM25) 68 (PM25) 68 (PM25) 80 (PM25)

Madera 19 (O3-8) 18 (O3-8) 19 (O3-8) 14 (O3-8) 18 (O3-8) 20 (O3-8) 21 (O3-8)

Fresno

Fresno-SSP 19 (O3-8) 16 (O3-8) 17 (O3-8) 14 (O3-8) 17 (O3-8) 21 (O3-8) 17 (O3-8)

Clovis 70 (PM25) 78 (PM25) 74 (PM25) 70 (PM25) 64 (PM25) 62 (PM25) 76 (PM25)

Fresno-Garland 72 (PM25) 80 (PM25) 78 (PM25) 72 (PM25) 72 (PM25) 66 (PM25) 78 (PM25)

Fresno-Drummond 16 (O3-8) 14 (O3-8) 19 (O3-8) 13 (O3-8) 17 (O3-8) 15 (O3-8) 15 (O3-8)

Parlier 16 (O3-8) 18 (O3-8) 20 (O3-8) 16 (O3-8) 19 (O3-8) 20 (O3-8) 22 (O3-8)

Tranquillity 46 (PM25) 38 (PM25) 64 (PM25) 70 (PM25) 50 (PM25) 64 (PM25) 70 (PM25)

Huron 42 (PM25) 42 (PM25) 53 (PM25) 57 (PM25) 62 (PM25) 53 (PM25) 68 (PM25)

Kings

Hanford 68 (PM25) 70 (PM25) 72 (PM25) 72 (PM25) 78 (PM25) 83 (PM25) 95 (PM25)

Corcoran 64 (PM25) 68 (PM25) 70 (PM25) 72 (PM25) 80 (PM25) 80 (PM25) 97 (PM25)

Tulare

Visalia, Church 76 (PM25) 74 (PM25) 76 (PM25) 78 (PM25) 74 (PM25) 78 (PM25) 80 (PM25)

Porterville 72 (PM25) 70 (PM25) 70 (PM25) 89 (PM25) 80 (PM25) 76 (PM25) 80 (PM25)

Ash Mountain-SNP 42 (PM25) 29 (PM25) 29 (PM25) 16 (O3-8) 17 (O3-8) 19 (O3-8) 31 (O3-8)

Lower Kaweah-SNP

Kern

Shafter 13 (O3-8) 20 (O3-8) 24 (O3-8) 19 (O3-8) 18 (O3-8) 22 (O3-8) 24 (O3-8)

Oildale 26 (PM10) 20 (O3-8) 29 (PM10) 34 (PM10) 27 (PM10) 24 (PM10) 41 (PM10)

Bakersfield-Calif 72 (PM25) 68 (PM25) 87 (PM25) 83 (PM25) 64 (PM25) 66 (PM25) 95 (PM25)

Bakersfield-Muni 10 (O3-8) 14 (O3-8) 18 (O3-8) 10 (O3-8) 12 (O3-8) 15 (O3-8) 15 (O3-8)

Edison 16 (O3-8) 16 (O3-8) 18 (O3-8) 13 (O3-8) 14 (O3-8) 22 (O3-8) 32 (O3-8)

Arvin-DiGiorgio 19 (O3-8) 19 (O3-8) 19 (O3-8) 15 (O3-8) 19 (O3-8) 23 (O3-8) 22 (O3-8)

Maricopa 22 (O3-8) 26 (O3-8) 25 (O3-8) 19 (O3-8) 23 (O3-8) 27 (O3-8) 29 (O3-8)

Lebec 17 (PM25) 42 (PM25) 25 (PM25) 29 (PM25) 21 (PM25)

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24- 2
Federal 1-Hr 0

O3-1hr (ppb) 121

PM10 State 24-hr 207
State 1-Hr Ozone 41

O3-8hr (ppb) 90

PM2.5 Federal 2006 24-hr 23
Federal 2008 8-Hr 73

PM 10 (µg/m³) 166
PM2.5 Federal 1997 24-hr

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

PM 2.5 (µg/m³) 103

State 1997 8-Hr Ozone 112
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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Friday, December 14, 2018 Page 1 of 1