PM10 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.

08/26 08/27 08/28 08/29 08/30 08/31 09/01

San Joaquin

Stockton-Hazelton

Tracy-Airport 32
31
25
14
18
17
23

Stanislaus

Modesto-14th

Turlock

Merced

Merced-Coffee

Madera

Madera

Fresno

Clovis

Fresno-Drummond

Fresno-First 58
37
39
59

Fresno-SSP

Huron

Parlier

Tranquillity

Kings

Corcoran 76
52
56
32
38
51
78

Hanford 63
51
53
29
31
39
66

Tulare

Ash Mountain-SNP

Lower Kaweah-SNP

Porterville

Visalia, Church

Kern

Arvin

Bakersfield-Calif 61
48
57
26
41
58
67

Edison

Lebec

Maricopa

Oildale

Shafter

District Maximum 76
52
57
32
41
58
78

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 1
Federal 1-Hr Ozone 2

O3-1hr (ppb) 141
PM10 State 24-hr 30
State 1-Hr Ozone 39

O3-8hr (ppb) 110
PM2.5 Federal 2006 24-hr 20
Federal 2008 8-Hr Ozone 67

PM 10 (µg/m³) 238
PM2.5 Federal 1997 24-hr 1
Federal 1997 8-Hr Ozone 35

PM 2.5 (µg/m³) 66
State 1997 8-Hr Ozone 81
¹Some of the days over the standards shown above may be the result of “Natural Events” such as extreme wind
episodes, or “Exceptional Events” such as wildfires and would not count as violations of the federal standard.
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Thursday, September 02, 2010 Page 1 of 1