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.

09/19 09/20 09/21 09/22 09/23 09/24 09/25

San Joaquin

Stockton-Hazelton 8 4 5 6 6 6

Manteca 6 3 3 4 4 4 4

Tracy-Airport 6 2 4 5 5 3 5

Stanislaus

Modesto-14th 7 4 3 4 4 3

Turlock 7 3 5 6 6 8 9

Merced

Merced-Coffee 9 7 5 8 7 7 8

Madera

Madera-City 6 5 4 5 7 6 7

Madera

Fresno

Fresno-SSP

Clovis 7 5 7 8 7 8

Fresno-Garland 5 5 5 4 6 7 6

Fresno-Drummond

Parlier

Tranquillity 8 5 3 3 3 2 3

Huron 9 8 4 4 6 4 6

Kings

Hanford 8 6 4 5 8 8 8

Corcoran 8 8 4 6 7 9 8

Tulare

Visalia, Church 8 10 5 5 9 8 8

Porterville 7 8 5 5 5 4 5

Ash Mountain-SNP 13 13 10 12 14 13 10

Lower Kaweah-SNP

Kern

Shafter

Oildale

Bakersfield-Calif 7 9 5 6 8 6 8

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec 7 6 7 7 6 4 6

District Maximum 13
13
10
12
14
13
10

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) 113
PM10 State 24-hr 122
State 1-Hr Ozone 39

O3-8hr (ppb) 99
PM2.5 Federal 2006 24-hr 8
Federal 2008 8-Hr Ozone 78

PM 10 (µg/m³) 133
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 25

PM 2.5 (µg/m³) 51
State 1997 8-Hr Ozone 105
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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Tuesday, September 26, 2017 Page 1 of 1