Latest Ozone Summary (PST)

Latest Ozone Summary for Selected Regions (Preliminary Data in PST)

Data on this page extracted on July 21, 2017 at 11:47:50

Note: The AQMIS Ozone pages reflect the 2015 National 8-Hour Ozone Standard of 0.070 ppm
     
     Region
So Far Today
(07/21/2017)
Yesterday
(07/20/2017)
7 Days ending
(07/20/2017)
This Year-to-Date
through 07/20/2017
 
Max 1hr
(ppm)
Latest hr
(PST)
Max 1hr
(ppm)
Max 8hr
(ppm)
Max 1hr
(ppm)
Max 8hr
(ppm)
Max 1hr
(ppm)
Max 8hr
(ppm)
     Sacramento Metropolitan Area1
9
 
     San Diego Air Basin
9
 
     San Francisco Bay Area Air Basin
9
 
     San Joaquin Valley Air Basin
9
 
     South Coast Air Basin
9
 
     Ventura County (Mainland Only)
9
 
     Antelope Valley and W. Mojave Desert
9
 
     Coachella Valley
9
 
     Eastern Kern County
9
 
     Imperial County
9
 
     Lake County2
N/A
N/A
N/A
N/A
N/A
N/A
 
     Mountain Counties - Central
9
 
     Mountain Counties - Southern
9
 
     North Central Coast Air Basin
9
 
     Sacramento Valley - Butte County
9
 
     Sacramento Valley - Sutter Buttes3
9
 
     Sacramento Valley (remaining areas)
9
 
     San Luis Obispo County
9
 
     Santa Barbara County
9
 
     Western Nevada County
9
 
 
  N/A: Data not available  
  To see monitoring site details, click on the numeric value for today, yesterday or 7 days.  
  To see underlying daily data for area, click on the year-to-date numeric value.  
  To see historical trend for area, click on area name.  
  Cell color is red if national 8-hour standard level is exceeded; Nat'l stds truncate 4 digit 8-hr avg to 3 decimals.  
1  The Sacramento Metropolitan Area includes Sacramento Metropolitan Air Quality Management District, Yolo-Solano Air  Pollution Control District, the southern third of Feather River Air Quality Management District, and all of El Dorado and Placer  Counties except for that portion in the Lake Tahoe Air Basin.

2  The Lake County Air Quality Management District is a non-real time data stream that will be updated monthly.

3  Seasonal Ozone Sites

Standards:
State 1-hr: 0.090 ppm
State 8-hr: 0.070 ppm
National 1-hr: 0.12 ppm
2008 National 8-hr: 0.075 ppm
2015 National 8-hr: 0.070 ppm

Other Standards (pdf)
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