Introduction to ECATT


The ECHO Clean Air Tracking Tool (ECATT) is a single interface and repository for Clean Air Act (CAA) data that can be used for air targeting and emission evaluation activities at stationary sources of air pollution. ECATT includes data from multiple emission inventories to enable users to identify top emitters by answering the following questions:

  • Who is emitting?
  • Where they are emitting?
  • Which pollutants are they emitting?
  • How much are they emitting?

Other facility information includes inspection and compliance data, industrial facility classifications, and CAA program applicability. In addition to emissions data, ECATT includes ambient pollutant measurements and modeling data to enable users to identify areas with high pollutant concentrations, elevated cancer risks, and higher potential for other health impacts, and identify the facility emissions occurring in those areas. By consolidating all of these data into one interface, ECATT provides access to many of the critical elements used to identify facilities for further evaluation.

ECATT integrates several data sources to facilitate analysis:

See About the Data for more information on the source data, including refresh dates. See Air Pollutant Report Help for discussion about air emission reporting programs. ECATT allows users to evaluate information in a way that can identify potential enforcement issues that would be difficult to pinpoint using existing tools. ECATT may also allow users to more easily identify and correct data quality issues.

Choose a Search Type

Air Monitoring Stations

Users have the option to search for ambient air quality for Hazardous Air Pollutants (HAPS) or Criteria Air Pollutants (CAPS).

  • Hazardous Air Pollutants, also known as toxic air pollutants, are those pollutants that are known or suspected to cause cancer, other serious health effects (including reproductive effects or birth defects), or adverse environmental effects.
  • Criteria Air Pollutants are six common air pollutants (particulate matter, ground-level ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, and lead), that have National Ambient Air Quality Standards (NAAQS) set by EPA, as required by the U.S. Clean Air Act.

The Air Monitoring Stations search provides access to data from a network of ambient monitoring stations on measurements separately for HAPS and CAPS. Ambient Monitoring Station Search Criteria Help - HAPs and Ambient Monitoring Station Search Criteria Help - CAPS provide detailed descriptions of each search term for the HAPS and CAPS searches respectively.

Emission Screener

The Emission Screener search captures data on stationary sources regulated under the Clean Air Act (CAA) and reported to several EPA air emission inventory programs:

This search feature identifies the top emissions, organized by facility, industry, or pollutant. Through the facility search, users can also drill down to see detailed information on each facility’s Air Pollutant Report. Emissions Screener Search Criteria Help provides detailed descriptions of each search term by category or alphabetized by term.