Air Quality Monitoring

The IWDW provides links to websites that provide access to ambient monitoring and deposition data. These data are used to evaluate the photochemical model's ability to estimate gas phase and particulate pollutants. Data from deposition monitoring networks are used to evaluate modeled wet and dry deposition. A number of research groups and local agencies conduct monitoring studies that collect data relevant to WAQS MPE, including ozone precursor and vertical ozone column data. A list of special monitoring studies is provided here (at least the ones we know of).
  1. EPA AirData: Air Quality Monitors
  2. EPA AirData: Outdoor Air Quality Data
  3. EPA Air Quality Trends
  4. National Atmospheric Deposition Program
  5. Federal Land Manager Environmental Database
  6. Special studies

EPA AirData Air Quality Monitors
EPA's AirData Air Quality Monitors
The AirData Air Quality Monitors app is a mapping application available on the web and on mobile devices that displays monitor locations and monitor-specific information. It also allows the querying and downloading of data daily and annual summary data. Map layers include: Monitors for all criteria pollutants (CO, Pb, NO2, Ozone, PM10, PM2.5, and SO2), PM2.5 Chemical Speciation Network monitors, IMPROVE, NATTS, NCORE, Nonattainment areas for all criteria pollutants, Tribal areas, Federal Class I areas (national parks and wilderness areas).
Data download for a variety of air quality monitoring data provided by EPA, including ambient monitoring data and real time Air Quality Index (AQI) ozone and PM data. Datasets are grouped by Criteria Gases (O3, SO2, CO and NO2), particulates, meteorological parameters, toxics, ozone precursors and lead. Annual summaries, daily and hourly data are available for certain pollutants. 8-hour average ozone and CO data are also provided to calculate ozone and CO design values for the NAAQS. 2016 revisions to the exceptional event rule, which describes exceptional event flags in the AQS data, can be found here.
O3 Design Values
2017 Ozone Design Values (EPA)
EPA provides air trends, including Air Quality Design Values that describe the air quality status of a given location relative to the level of the National Ambient Air Quality Standards (NAAQS). 2017 Design Values are currently available with calculated values going back to 2005. Note that some of the published design values can change after the date of publication for a variety of reasons, including EPA agreement that certain data were influenced by exceptional events and therefore not subject for comparison with the NAAQS.
The NADP is a cooperative effort between many different groups, including federal, state, tribal and local governmental agencies, educational institutions, private companies, and non-governmental agencies. The NADP's goal is to provide data on the amounts, trends, and geographic distributions of acids, nutrients, and base cations in precipitation.
The FED provides tools to visualize and download ambient monitoring data and metadata. The Query Wizard Tool allows you to specify datasets, monitoring sites, parameters, date ranges, data quality flags, and other criteria. A variety of output formats are supported. The FED includes a couple datasets that are not available from AQS, such as calculated parameters from the IMPROVE monitoring network that support Regional Haze Planning, and data from the NADP deposition network.
The IWDW collects data from special monitoring studies active to augment evaluation of WAQS air quality modeling. Of particular interest are field campaigns that collected high resolution ozone and precursor data during 2014, and monitoring that collected ozone and precursor column data.
  • Frappé UCAR Field Campaigns
  • Discover AQ UCAR Field Campaigns
  • CSU Air emissions study Garfield County Air Quality Management website: Characterizing Air Emissions from Natural Gas Drilling and Well Completion Operations in Garfield County, CO (2012-2016)
  • UBOS 2014 Uinta Basin Ozone Study. UTAH DEQ
  • BAO tower NOAA ESRL Field Campaigns. BAO Tower data from 2007-2016
  • Ozonesondes NOAA ESRL Global Monitoring Division. Access to monitoring site information for vertical ozone profiles from ozonesondes and aircraft flights, many of which operated in 2014. Data from ESRL met and ground level ozone monitors are also available.