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.

03/13
03/14
03/15
03/16
03/17
03/18
03/19

San Joaquin

Stockton-Hazelton 36 (O3-8) 35 (O3-8) 50 (PM25) 66 (PM25) 57 (PM25) 68 (PM25) 42 (O3-8)

Manteca 17 (PM25) 38 (PM25) 33 (PM25) 57 (PM25) 57 (PM25) 46 (PM25)

Tracy-Airport 41 (O3-8) 40 (O3-8) 44 (O3-8) 47 (O3-8) 49 (O3-8) 51 (O3-8) 43 (O3-8)

Stanislaus

Modesto-14th 41 (O3-8) 38 (O3-8) 42 (O3-8) 50 (PM25) 61 (O3-8) 57 (PM25) 46 (PM25)

Turlock 37 (O3-8) 36 (O3-8) 53 (PM25) 59 (PM25) 55 (PM25) 62 (PM25) 64 (PM25)

Merced

Merced-Coffee 41 (O3-8) 42 (PM25) 53 (PM25) 53 (PM25) 50 (PM25) 48 (O3-8) 50 (PM25)

Madera

Madera-City 36 (O3-8) 38 (O3-8) 46 (PM25) 44 (O3-8) 43 (O3-8) 45 (O3-8) 43 (O3-8)

Madera 39 (O3-8) 42 (O3-8) 44 (O3-8) 48 (O3-8) 48 (O3-8) 49 (O3-8) 46 (O3-8)

Fresno

Fresno-SSP 35 (O3-8) 38 (O3-8) 43 (O3-8) 45 (O3-8) 44 (O3-8) 50 (O3-8) 46 (O3-8)

Clovis 38 (O3-8) 38 (PM25) 44 (O3-8) 48 (O3-8) 46 (O3-8) 54 (O3-8) 49 (PM10)

Fresno-Garland 35 (O3-8) 42 (PM25) 41 (O3-8) 50 (PM25) 44 (O3-8) 47 (O3-8) 44 (O3-8)

Fresno-Drummond 37 (O3-8) 42 (O3-8) 42 (O3-8) 50 (O3-8) 49 (O3-8) 54 (O3-8) 46 (O3-8)

Parlier 34 (O3-8) 42 (O3-8) 43 (O3-8) 46 (O3-8) 47 (O3-8) 58 (O3-8) 50 (O3-8)

Tranquillity 40 (O3-8) 42 (O3-8) 45 (O3-8) 50 (O3-8) 48 (O3-8) 47 (O3-8) 46 (O3-8)

Huron 8 (PM25) 17 (PM25) 25 (PM25) 25 (PM25) 25 (PM25) 29 (PM25) 17 (PM25)

Kings

Hanford 39 (O3-8) 41 (O3-8) 44 (O3-8) 57 (PM25) 70 (PM25) 62 (PM25) 44 (O3-8)

Corcoran 17 (PM25) 33 (PM25) 50 (PM25) 55 (PM25) 62 (PM25) 57 (PM25) 39 (PM10)

Tulare

Visalia, Church 36 (O3-8) 46 (PM25) 33 (PM25) 50 (PM25) 50 (PM25) 55 (PM25) 47 (O3-8)

Porterville 38 (PM25) 39 (O3-8) 42 (O3-8) 47 (O3-8) 49 (O3-8) 55 (PM25) 44 (O3-8)

Ash Mountain-SNP 34 (O3-8) 41 (O3-8) 44 (O3-8) 44 (O3-8) 44 (O3-8) 44 (O3-8) 47 (O3-8)

Lower Kaweah-SNP

Kern

Shafter 42 (O3-8)

Oildale 40 (O3-8) 40 (O3-8) 43 (O3-8) 47 (O3-8) 46 (O3-8) 46 (PM10) 59 (PM10)

Bakersfield-Calif 40 (O3-8) 42 (O3-8) 50 (PM25) 54 (O3-8) 50 (O3-8) 50 (O3-8) 44 (O3-8)

Bakersfield-Muni 37 (O3-8) 39 (O3-8) 39 (O3-8) 48 (O3-8) 45 (O3-8) 42 (O3-8) 39 (O3-8)

Edison 41 (O3-8) 43 (O3-8) 43 (O3-8) 51 (O3-8) 48 (O3-8) 46 (O3-8) 44 (O3-8)

Arvin-DiGiorgio 41 (O3-8) 42 (O3-8) 44 (O3-8) 54 (O3-8) 51 (O3-8) 67 (O3-8) 46 (O3-8)

Maricopa 43 (O3-8) 44 (O3-8) 46 (O3-8) 54 (O3-8) 64 (O3-8) 71 (O3-8) 48 (O3-8)

Lebec 17 (PM25) 25 (PM25) 29 (PM25) 33 (PM25) 17 (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) 67

PM10 State 24-hr 11
State 1-Hr Ozone 0

O3-8hr (ppb) 61

PM2.5 Federal 2006 24-hr 10
Federal 2008 8-Hr Ozone 0

PM 10 (µg/m³) 92
PM2.5 Federal 1997 24-hr

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

PM 2.5 (µg/m³) 53

State 1997 8-Hr Ozone 0
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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Wednesday, March 20, 2019 Page 1 of 1