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.

04/11
04/12
04/13
04/14
04/15
04/16
04/17

San Joaquin

Stockton-Hazelton 32 (O3-8) 38 (O3-8) 40 (O3-8) 34 (O3-8) 39 (O3-8) 33 (O3-8) 37 (O3-8)

Manteca 17 (PM25) 17 (PM25) 21 (PM25) 21 (PM25) 21 (PM25) 17 (PM25) 21 (PM25)

Tracy-Airport 40 (O3-8) 44 (O3-8) 46 (O3-8) 49 (O3-8) 17 (PM25) 39 (O3-8) 44 (O3-8)

Stanislaus

Modesto-14th 39 (O3-8) 44 (O3-8) 45 (O3-8) 40 (O3-8) 49 (O3-8) 39 (O3-8) 44 (O3-8)

Turlock 40 (O3-8) 43 (O3-8) 48 (O3-8) 44 (O3-8) 49 (O3-8) 39 (O3-8) 44 (O3-8)

Merced

Merced-Coffee 42 (O3-8) 43 (O3-8) 49 (O3-8) 49 (O3-8) 50 (O3-8) 40 (O3-8) 42 (O3-8)

Madera

Madera-City 37 (O3-8) 36 (O3-8) 46 (O3-8) 44 (O3-8) 21 (PM25) 29 (PM25) 44 (O3-8)

Madera 40 (O3-8) 41 (O3-8) 50 (O3-8) 49 (O3-8) 51 (O3-8) 38 (O3-8) 42 (O3-8)

Fresno

Fresno-SSP 38 (O3-8) 37 (O3-8) 48 (O3-8) 45 (O3-8) 47 (O3-8) 35 (O3-8) 42 (O3-8)

Clovis 42 (O3-8) 44 (O3-8) 74 (O3-8) 54 (O3-8) 54 (O3-8) 37 (O3-8) 47 (O3-8)

Fresno-Garland 38 (O3-8) 38 (O3-8) 51 (O3-8) 48 (O3-8) 48 (O3-8) 34 (O3-8) 43 (O3-8)

Fresno-Drummond 44 (O3-8) 44 (O3-8) 71 (O3-8) 64 (O3-8) 61 (O3-8) 39 (O3-8) 48 (O3-8)

Parlier 41 (O3-8) 44 (O3-8) 54 (O3-8) 58 (O3-8) 50 (O3-8) 38 (O3-8) 46 (O3-8)

Tranquillity 44 (O3-8) 42 (O3-8) 49 (O3-8) 48 (O3-8) 54 (O3-8) 39 (O3-8) 44 (O3-8)

Huron 13 (PM25) 13 (PM25) 17 (PM25) 25 (PM25) 13 (PM25) 13 (PM25) 13 (PM25)

Kings

Hanford 41 (O3-8) 46 (O3-8) 51 (O3-8) 58 (O3-8) 51 (O3-8) 38 (O3-8) 45 (O3-8)

Corcoran 32 (PM10) 42 (PM25) 46 (PM25) 33 (PM25) 29 (PM25) 21 (PM25) 38 (PM25)

Tulare

Visalia, Church 36 (O3-8) 46 (PM25) 50 (O3-8) 51 (O3-8) 47 (O3-8) 36 (O3-8) 46 (O3-8)

Porterville 37 (O3-8) 42 (O3-8) 49 (O3-8) 51 (O3-8) 48 (O3-8) 41 (O3-8) 59 (PM25)

Ash Mountain-SNP 41 (O3-8) 50 (PM25) 45 (O3-8) 50 (PM25) 44 (O3-8) 34 (O3-8) 36 (O3-8)

Lower Kaweah-SNP

Kern

Shafter 43 (O3-8) 44 (O3-8) 61 (O3-8) 61 (O3-8) 51 (O3-8) 39 (O3-8) 49 (O3-8)

Oildale 42 (O3-8) 42 (O3-8) 49 (O3-8) 50 (O3-8) 47 (O3-8) 39 (O3-8) 48 (O3-8)

Bakersfield-Calif 42 (O3-8) 43 (O3-8) 54 (O3-8) 54 (O3-8) 47 (O3-8) 40 (O3-8) 50 (O3-8)

Bakersfield-Muni 38 (O3-8) 38 (O3-8) 46 (O3-8) 46 (O3-8) 44 (O3-8) 36 (O3-8) 46 (O3-8)

Edison 44 (O3-8) 44 (O3-8) 61 (O3-8) 67 (O3-8) 51 (O3-8) 44 (O3-8) 61 (O3-8)

Arvin-DiGiorgio 44 (O3-8) 45 (O3-8) 44 (O3-8)

Maricopa 45 (O3-8) 44 (O3-8) 64 (O3-8) 74 (O3-8) 51 (O3-8) 41 (O3-8) 50 (O3-8)

Lebec 13 (PM25) 13 (PM25) 21 (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) 70

PM10 State 24-hr 12
State 1-Hr Ozone 0

O3-8hr (ppb) 62

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

PM 10 (µg/m³) 99
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.
Make one change for clean air! Visit www.healthyairliving.com and become a part of the solution!
Thursday, April 18, 2019 Page 1 of 1