AQI by Site

AQI is determined using real-time data measured at each site. AQI is based on the pollutant that measured highest.

Factors such as site capabilities, seasonality, wildfire or wind events, and/or technical difficulties influence which

pollutant is used to determine AQI. The data in this report is preliminary and subject to change.

01/22
01/23
01/24
01/25
01/26
01/27
01/28

San Joaquin

Stockton-Hazelton 46 (PM25) 68 (PM25) 57 (PM25) 72 (PM25) 57 (PM25) 38 (PM25) 33 (PM25)

Manteca 33 (PM25) 46 (PM25) 29 (PM25) 68 (PM25) 57 (PM25) 21 (PM25) 21 (PM25)

Tracy-Airport 38 (PM25) 38 (PM25) 29 (PM25) 57 (PM25) 50 (PM25) 31 (O3-8) 31 (O3-8)

Stanislaus

Modesto-14th 33 (PM25) 62 (PM25) 33 (PM25) 70 (PM25) 62 (PM25) 30 (O3-8) 31 (O3-8)

Turlock 42 (PM25) 19 (O3-8) 21 (O3-8) 19 (O3-8) 31 (O3-8) 28 (O3-8) 42 (PM25)

Merced

Merced-Coffee 29 (PM25) 38 (PM25) 66 (PM25) 72 (PM25) 55 (PM25) 29 (O3-8) 33 (PM25)

Madera

Madera-City 50 (PM25) 29 (PM25) 68 (PM25) 76 (PM25) 57 (PM25) 29 (PM25) 33 (PM25)

Madera 27 (O3-8) 24 (O3-8) 20 (O3-8) 26 (O3-8) 27 (O3-8) 21 (O3-8) 29 (O3-8)

Fresno

Fresno-SSP 27 (O3-8) 23 (O3-8) 21 (O3-8) 24 (O3-8) 27 (O3-8) 18 (O3-8) 29 (O3-8)

Clovis 53 (PM25) 42 (PM25) 76 (PM25) 83 (PM25) 53 (PM25) 42 (PM25) 38 (PM25)

Fresno-Garland 66 (PM25) 50 (PM25) 74 (PM25) 87 (PM25) 59 (PM25) 42 (PM25) 46 (PM25)

Fresno-Drummond 28 (O3-8) 20 (O3-8) 16 (O3-8) 25 (O3-8) 27 (O3-8) 17 (O3-8) 28 (O3-8)

Parlier 32 (O3-8) 25 (O3-8) 18 (O3-8) 24 (O3-8) 26 (O3-8) 20 (O3-8) 29 (O3-8)

Tranquillity 46 (PM25) 28 (O3-8) 50 (PM25) 33 (PM25) 38 (PM25) 29 (O3-8) 31 (O3-8)

Huron 29 (PM25) 21 (PM25) 33 (PM25) 38 (PM25) 21 (PM25) 13 (PM25) 17 (PM25)

Kings

Hanford 62 (PM25) 55 (PM25) 76 (PM25) 80 (PM25) 68 (PM25) 53 (PM25) 59 (PM25)

Corcoran 50 (PM25) 46 (PM25) 70 (PM25) 76 (PM25) 64 (PM25) 38 (PM25) 50 (PM25)

Tulare

Visalia, Church 57 (PM25) 62 (PM25) 91 (PM25) 83 (PM25) 59 (PM25) 46 (PM25) 55 (PM25)

Porterville 53 (PM25) 66 (PM25) 87 (PM25) 68 (PM25) 68 (PM25) 46 (PM25) 53 (PM25)

Ash Mountain-SNP 34 (O3-8) 29 (O3-8) 29 (PM25) 25 (PM25) 25 (PM25) 27 (O3-8) 25 (PM25)

Lower Kaweah-SNP 29 (O3-8) 36 (O3-8) 31 (O3-8) 34 (O3-8) 29 (O3-8) 33 (O3-8) 35 (O3-8)

Kern

Shafter 35 (O3-8) 25 (O3-8) 13 (O3-8) 31 (O3-8) 26 (O3-8) 34 (O3-8) 25 (O3-8)

Oildale 34 (O3-8) 21 (O3-8) 28 (PM10) 29 (O3-8) 23 (O3-8)

Bakersfield-Calif 50 (PM25) 64 (PM25) 76 (PM25) 70 (PM25) 72 (PM25) 46 (PM25) 55 (PM25)

Bakersfield-Muni 30 (O3-8) 18 (O3-8) 10 (O3-8) 25 (O3-8) 19 (O3-8) 27 (O3-8) 18 (O3-8)

Edison 37 (O3-8) 24 (O3-8) 19 (O3-8) 28 (O3-8) 24 (O3-8) 33 (O3-8) 22 (O3-8)

Arvin-DiGiorgio

Maricopa 35 (O3-8) 32 (O3-8) 26 (O3-8) 31 (O3-8) 32 (O3-8) 38 (O3-8) 30 (O3-8)

Lebec 17 (PM25) 29 (PM25) 29 (PM25) 25 (PM25) 25 (PM25) 25 (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) 49

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

O3-8hr (ppb) 46

PM2.5 Federal 2006 24-hr 1
Federal 2008 8-Hr Ozone 0

PM 10 (µg/m³) 47
PM2.5 Federal 1997 24-hr

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

PM 2.5 (µg/m³) 39

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!
Wednesday, January 29, 2020 Page 1 of 1