Subject Top Page: Background - AQMIS 2

Air Quality and Meteorological Information System

This page last reviewed April 7, 2011

The Air Quality and Meteorological Information System (AQMIS) is a web-based source for real-time and official air quality and meteorological data. It is used by various groups such as state and local officials and the public to track air quality. It is also used for smoke management and air pollution forecasting.

AQMIS always reports data in PST (Pacific Standard Time).

The web pages contained on this system provide links to specialized ozone pages, data query tools, and other products such as the ability to plot or download data. The data query tools can provide detailed information that can be summarized by area or by site and can provide hourly, daily, or summarized statistics. In addition, the query tools provide a variety of reports that can give details on sites or data availability. Please note that the real-time data are so new that they have not undergone a rigorous QA process at the time of release and hence are considered preliminary.

To visualize the data that is gathered, the concentrations are color-coded and displayed on a map of California. A brief description of the two different maps is provided below. Further details can be found on the respective map pages.

  1. The Ozone and PM2.5 Map Pages use an open source program called MapServer to show the most recent air quality on a map. In order to view the latest data for as many sites, we go back 2-3 hours and select the latest available data for each site. This means that if the time is 11 am we would use 8am as the start hour. Different sites can have different hours of data (ie: with start hour of 8am, 9am, or 10am) whichever comes latest.

  2. The Google Map Pages allow the user to customize what data is displayed on the map. The user can view either air quality or meteorological parameters, can change to another day or hour, can advance and retreat hours, and can show all air quality sites for the selected year. In addition, the user can use google map features such and panning and zooming to a particular geographic area, can change the view to satellite or terrain views, and can click on dots to obtain more information.

Further information and details about AQMIS can be found by clicking on the links below.

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