Note: This information is published as soon as the values are
detected, and does not imply that the data have passed
quality assurance validation procedures. If no forecasts were made
during a given month, that month is omitted from the calendar below.
| In the calendar view below, the upper left of the date field represents the forecast AQI (by color) and the lower right of the date field represents the observed max AQI (by color). For more information about the AQI and AQI colors, see Information about the Air Quality Index (AQI). |  |
| Smog Alert Statistics |
| Air Quality Status |
# Days FORECAST |
# Days OBSERVED |
 |
40 |
39 |
 |
0 |
0 |
| Correct 'Alert Status' Forecasts: 38 (100%) |
| AQI Statistics |
| AQI range |
# Days FORECAST |
# Days OBSERVED |
 |
37 |
30 |
 |
3 |
9 |
 |
0 |
0 |
 |
0 |
0 |
 |
0 |
0 |
| Correct 'AQI range' Forecasts: 33 (87%) |
In March 2008, EPA strengthened the air quality standards for ground-level ozone, a primary component of smog. These new standards mean that lower levels of ozone will now be reported as unhealthy in the daily smog forecasts and in the Air Quality Index (AQI). This website reflects this change.
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| January 2012 |
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