Ozone Eight-Hour Maximum (PPB)

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.

12/06 12/07 12/08 12/09 12/10 12/11 12/12

San Joaquin

Stockton-Hazelton 17 18 23 19 22 13 15

Manteca

Tracy-Airport 31 31 31 36 36 27 28

Stanislaus

Modesto-14th 23 20 20 26 29 17 19

Turlock 25 23 27 25 27 15 23

Merced

Merced-Coffee 24 25 28 25 27 22 27

Madera

Madera-City 25 27 29 30 32 25 32

Madera 29 30 31 34 38 32 24

Fresno

Fresno-SSP 28 21 32 33 35 22 33

Clovis 26 26 29 32 33 22

Fresno-Garland 25 18 28 26 30 26

Fresno-Drummond 18 18 15 25 16 20

Parlier 31 33 35 34 45 37 21

Tranquillity 28 35 35 41 45 41 40

Huron

Kings

Hanford 27 27 32 28 35 32

Corcoran

Tulare

Visalia, Church 29 26 32 33 40 35 41

Porterville 31 29 29 33 38 39 41

Ash Mountain-SNP 36 37 38 37 36 37 39

Lower Kaweah-SNP 40 40 41 40 40 39 39

Kern

Shafter

Oildale 39 37 30 40 50 47 49

Bakersfield-Calif 35 33 37 39 45 46 50

Bakersfield-Muni 30 31 33 33 40 44 45

Edison 33 40 44 44 49 55 56

Arvin-DiGiorgio 35 41 42 44 49 55 50

Maricopa 42 38 46 53 54 59 57

Lebec

District Maximum 42
41
46
53
54
59
57

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 188
State 1-Hr Ozone 43

O3-8hr (ppb) 99
PM2.5 Federal 2006 24-hr 26
Federal 2008 8-Hr Ozone 92

PM 10 (µg/m³) 152
PM2.5 Federal 1997 24-hr 4
Federal 1997 8-Hr Ozone 27

PM 2.5 (µg/m³) 69
State 1997 8-Hr Ozone 125
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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Wednesday, December 13, 2017 Page 1 of 1