PM25 24 Hour Average (µg/m3)

The information in this report is based on preliminary data and is subject to change. The real-time

PM10/PM2.5 monitoring equipment 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 23 32 32 35 35 21 35

Manteca 18 32 22 25 18 19 32

Tracy-Airport 8 23 16 19 8 12 17

Stanislaus

Modesto-14th 22 30 22 31 20 16 30

Turlock 24 32 26 32 23 22 33

Merced

Merced-Coffee 18 19 28 31 25 23 29

Madera

Madera-City 20 21 24 26 20 20 26

Madera

Fresno

Fresno-SSP

Clovis 21 25 23 21 18 17 24

Fresno-Garland 22 26 25 22 22 19 25

Fresno-Drummond

Parlier

Tranquillity 11 9 18 21 12 18 21

Huron 10 10 13 15 17 13 20

Kings

Hanford 20 21 22 22 25 27 33

Corcoran 18 20 21 22 26 26 34

Tulare

Visalia, Church 24 23 24 25 23 25 26

Porterville 22 21 21 30 26 24 26

Ash Mountain-SNP 10 7 7 4 6

Lower Kaweah-SNP

Kern

Shafter

Oildale

Bakersfield-Calif 22 20 29 27 18 19 33

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec 4 10 6 7 5

District Maximum 24
32
32
35
35
27
35

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 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