Daily Report

Ozone Eight-Hour Maximum (PPB)

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

10/05 10/06 10/07 10/08 10/09 10/10 10/11

San Joaquin

Stockton-University 53 55 48 49 40 38 35

Manteca

Tracy-Airport 62 61 59 60 54 45 40

Stanislaus

Modesto-14th 60 65 57 59 56 46 41

Turlock 66 67 60 65 61 50 43

Merced

Merced-M St.

Merced-Vierra 71 69 63 71 60 45 41

Madera

Madera-City 70 71 72 79 69 45 42

Madera 75 69 72 78 69 44 41

Fresno

Fresno-SSP 67 76 79 70 45 42

Clovis 68 81 78 76 73 49 43

Fresno-Garland 65 72 72 70 66 45 40

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 64 73 78 73 64 48 41

Parlier 69 76 76 68 71 49 42

Tranquillity 62 58 56 62 55 40 40

Huron

Kings

Hanford 71 66 79 73 56 51 40

Corcoran

Tulare

Visalia-Ashland 80 77

Porterville 75 75 79 78 72 47 44

Ash Mountain-SNP 59 71 74 64 77 50 51

Kern

Shafter 60 70 62 59 49 43 40

Oildale 69 80 81 60 52 49

Bakersfield-Gold

Bakersfield-Calif 58 70 71 66 59 46 43

Bakersfield-Muni 57 68 71 73 58 45 42

Edison 66 75 83 83 68 50 48

Arvin-DiGiorgio 61 70 74 73 61 47 46

Maricopa 60 68 69 66 65 48 45

Lebec

District Maximum 80 81 83 83 77 52 51
Maximum Measured
Value for This Year
 
PollutantMaximum
O3-1hr (ppb)101
O3-8hr (ppb)84
PM 10 (µg/m³)150
PM 2.5 (µg/m³)49.5
Unofficial Days Over the Federal and State Standards¹
 
Federal 2015 8-Hr Ozone 53
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 29
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 15
  Federal 1-Hr Ozone 0
State 2005 8-Hr Ozone 53
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 131
¹Data affected by smoke, high winds, fireworks, 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.valleyair.org/hal and become a part of the solution!
Monday, October 12, 2026 Page 1 of 1