Latest Week Ozone Summary (PST)

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

Data on this page extracted on May 25, 2017 at 05:34:05

Note: The AQMIS Ozone pages reflect the 2008 National 8-Hour Ozone Standard of 0.075 ppm
     
     Region
Latest 7 Days (ending 05/24/2017)
This Year-to-Date
through 05/24/2017
 
Days Exceeding Standards
Maximum
Concentration (ppm)
Maximum
Concentration (ppm)
State
National
1-hour
8-hour
8-hour
1-hour
8-hour
1-hour
8-hour
     Sacramento Metropolitan Area*
 
     San Diego Air Basin
 
     San Francisco Bay Area Air Basin
 
     San Joaquin Valley Air Basin
 
     South Coast Air Basin
 
     Ventura County (Mainland Only)
 
     Antelope Valley and W. Mojave Desert
 
     Coachella Valley
 
     Eastern Kern County
 
     Imperial County
 
     Lake County**
 
 
 
N/A
N/A
N/A
N/A
 
     Mountain Counties - Central
 
     Mountain Counties - Southern
 
     North Central Coast Air Basin
 
     Sacramento Valley - Butte County
 
     Sacramento Valley - Sutter Buttes***
 
     Sacramento Valley (remaining areas)
 
     San Luis Obispo County
 
     Santa Barbara County
 
     Western Nevada County
 
 
  To see monitoring site details, click a 7-day numeric value.  
  To see underlying daily data for area, click on the year-to-date numeric value.  
  Cell color is red if national standard level is exceeded; Nat'l stds truncate 4 digit 8-hr avg to 3 decimals.  
  Cell color is yellow if state standard level is exceeded.  
* 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.
** The Lake County Air Quality Management District is a non-real time data stream that will be updated monthly.
*** The Sacramento Valley-Sutter Buttes site is a seasonal monitoring site (May through October only).

Standards:
State 1-hr: 0.09 ppm
State 8-hr: 0.070 ppm
National 8-hr: 0.075 ppm

Other Standards (pdf) .
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