Data Catalog

Dataset: Air Quality Index

Description: The EPA Air Quality Index (AQI) is an index for reporting daily air quality. The US Environmental Protection Agency calculates the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution (also known as particulate matter), carbon monoxide, sulfur dioxide and nitrogen dioxide.

Collection Methodology: The methodology for calculating the AQI is unique for each of the major air pollutants. The AQI for ozone is based on the 8-hour average ozone concentration, which is computed by averaging the measured hourly ozone concentrations over an 8-hour period. In real-time, eight hours of data are not available so a method was devised to estimate the 8-hour AQI from hourly ozone data using a mid-point approach. The AQI for particle pollution was developed for assessing air quality conditions over a 24-hour period. To assess air quality conditions at a given time using the AQI, one would ideally use the average particle pollution measurement over a 24-hour window centered about the hour being measured (i.e., mid point of the 24 hour range or Mid-24) to compute the AQI. For more information on the AQI calculations.

General Business Terms: This dataset is available for use as part of the core Mapfluence offer.

Attribution Policy: Developers must include attribution link and text as follows: Map data © 2010 Urban Mapping Inc and/or other parties when developing applications.

County Air Quality Index (epa_airquality.county_data): Air Quality Index; Details...