Latest Week Ozone Summary (PST)

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

Data on this page extracted on July 23, 2017 at 15:48:52

Note: The AQMIS Ozone pages reflect the 2015 National 8-Hour Ozone Standard of 0.070 ppm
     
     Region
Latest 7 Days (ending 07/22/2017)
This Year-to-Date
through 07/22/2017
 
Days Exceeding National Standards
Maximum
Concentration (ppm)
Maximum
Concentration (ppm)
8-hr Std
0.075
ppm
8-hr Std
0.070
ppm
1-hour
8-hour
1-hour
8-hour
     Sacramento Metropolitan Area1
     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 County2
 
 
N/A
N/A
     Mountain Counties - Central
     Mountain Counties - Southern
     North Central Coast Air Basin
     Sacramento Valley - Butte County
     Sacramento Valley - Sutter Buttes3
     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 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 The Sacramento Valley-Sutter Buttes site is a seasonal monitoring site (May through October only).

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)
preload