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Pima County Air Monitoring Network
Surface In-Situ Networks
The ultimate goal of the Pima County air quality control program is to reduce the concentration of harmful air contaminants in ambient air to safe and healthy levels, and to maintain those levels. A key process in controlling air pollution is to define the nature and extent of air quality problems within a geographical area through monitoring. Ambient air monitoring in Pima County has been conducted by the Pima County Department of Environmental Quality (PDEQ) and its predecessors since the 1960's. Over time, various air pollution monitoring and research programs have been established and revised to meet changing federal regulations and local needs. Currently, the Pima County monitoring network is being operated by the Technical Operations division of PDEQ. The Environmental Protection Agency has delegated authority to PDEQ to operate the portion of the State or Local Air Monitoring Stations (SLAMS) located in Pima County. In addition to SLAMS, Special Purpose Monitoring Stations (SPMS) are operated to accomplish various objectives. PDEQ also operates and maintains a visibility and urban haze network in Pima County for the State of Arizona. PDEQ also generates an Air Quality Index (AQI) report several times a day for public notification of current air quality conditions. The air quality monitoring groups is divided into 3 units; the Field Monitoring unit, the Data Management unit and the Quality Assurance / Quality Control (QA/QC) unit. The field monitoring unit conducts all operations related to routine maintenance, operations, troubleshooting and repair of equipment necessary for air quality monitoring. The data management unit handles all operations related to network operations, data acquisition, management, storing and reporting of data. The QA/QC unit assures the quality and accuracy of the equipment operation and the data recovered. Almost all routine air quality monitoring data generated by PDEQ are submitted to the U.S. Environmental Protection Agency (EPA) AIRS database system. Most air quality monitoring sites in the PDEQ network are equipped with electronic data loggers designed specifically for the logging of air quality data. These data loggers are programmed to take the electrical outputs from air quality monitoring instruments at a site and transmit this information via a modem to a central computer data acquisition system (DAS) located in the PDEQ offices. This information is then validated to detect possible erroneous readings, and stored in a central database. The information is then reported to the EPA, documented in summary reports, and made available to local agencies, researchers and the public.
Tom Coffin
Pima County Department of Environmental Quality
150 West Congress Street, Suite 109 Tucson, AZ 85701
(520) 740-3340
Network NameAZ Pima County AQ
Facility TypeNetwork
Number of Stations13
Map of Stationshttp://www.airinfonow.com/monsites/map_site.asp
Categorymeteorology, air chemistry
Parameters (Most)
Paramters (Limited)ozone, carbon monoxide, nitric oxide, nitrogen dioxide, wind speed, wind direction, air temperature, PM2.5, PM10, solar radiation, relative humidity
Period of Record
Temporal Resolution60 minute
Data Season
Data AvailabilityDEQ web page http://www.airinfonow.org/drdas/rptslist.asp displays hourly updates of the Air Quality Index.
Other Purposes
25 Sep 2009 10:52