Latest Ozone Summary (PST)

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

Data on this page extracted on May 25, 2017 at 13:10:11

Note: The AQMIS Ozone pages reflect the 2008 National 8-Hour Ozone Standard of 0.075 ppm
     
     Region
So Far Today
(05/25/2017)
Yesterday
(05/24/2017)
7 Days ending
(05/24/2017)
This Year-to-Date
through 05/24/2017
 
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 Area*
10
 
     San Diego Air Basin
10
 
     San Francisco Bay Area Air Basin
10
 
     San Joaquin Valley Air Basin
10
 
     South Coast Air Basin
7
 
     Ventura County (Mainland Only)
10
 
     Antelope Valley and W. Mojave Desert
10
 
     Coachella Valley
11
 
     Eastern Kern County
10
 
     Imperial County
10
 
     Lake County**
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
 
     Mountain Counties - Central
10
 
     Mountain Counties - Southern
10
 
     North Central Coast Air Basin
10
 
     Sacramento Valley - Butte County
10
 
     Sacramento Valley - Sutter Buttes***
9
 
     Sacramento Valley (remaining areas)
10
 
     San Luis Obispo County
10
 
     Santa Barbara County
10
 
     Western Nevada County
10
 
 
  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.  
  Cell color is yellow if state 1-hour 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) .
preload