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AirControlNET is a PC-based database tool for conducting pollutant emissions control strategy and costing analysis. It overlays a detailed control measure database on EPA emissions inventories to compute source- and pollutant-specific emission reductions and associated costs at various geographic levels (national, regional, local). It contains a database of control measures and cost information for reducing the emissions of criteria pollutants (e.g., NOx, SO2, VOC, PM10, PM2.5, NH3) as well as CO and Hg from point (utility and non-utility), area, nonroad, and mobile sources as provided in EPA's National Emission Inventory (NEI). Users of this tool may include their own inventory files within this tool, but these files must be in a suitable format to operate within ACN.

Four key modules currently within AirControlNET version 4.1 include:

1) Control Scenarios Module (CSM) that allows the user to select specific control measures from the database by pollutant, source, and geographic area to create an emissions reduction scenario with computed emissions reductions and associated costs. The user can then export this scenario into spreadsheet format for further analysis or into an input script for air quality modeling within REMSAD-ST (Pechan and ENVIRON, 2001 and 2002).

2) Least-Cost Module (LCM) that allows the user to obtain an emissions reduction scenario by source and geographic area consisting of the set of control measures that achieves a stated pollutant-specific emission reduction target (in tons or percentage) with the least amount of total annual costs.

3) Script Builder Module (SBM) that allows the user to develop 'control factor files' based on percent reductions by pollutant, source, and geographic area to create an emissions reduction scenario for input into the REMSAD-ST air quality model.

4) Sensitivity Module - this allows the user the opportunity to vary important analysis parameters to determine their effect upon the results of analyses. These parameters are: interest rate, equipment life, control efficiency, labor rate, and energy prices.

ACN also contains a module that allows users to run mobile source control strategies for criteria pollutants. This module allows for estimation of emissions reductions and costs based on existing runs of EPA's MOBILE6 and NONROAD models.

Finally, ACN also includes exporting and reporting features that allows for export of emissions and cost data resulting from the userís queries into text files, spreadsheets, pre-formatted reporting tables, or maps.

The underlying data for the control measures and costs come from reports such as the EPA Air Pollution Control Cost Manual, and from reports issued by EPA's Office of Research and Development and other EPA references. Data from references prepared outside of EPA are also part incorporated into ACN as appropriate. AirControlNET's primary purpose is to assist EPA in carrying out national and regional control strategy applications in support of implementation of the National Ambient Air Quality Standards (NAAQS), standards that are designed to protect public health and improve environmental quality by limiting concentrations of criteria pollutants throughout the U.S. We believe that AirControlNET is best suited for application of criteria pollutant and precursor control strategies at a national or regional level. ACN may also serve as a potentially useful tool for States and local agencies as they prepare control strategy analyses for various purposes (e.g. SIP development). We want to note that the coverage of mobile source controls is limited in this tool.

A project is underway by EPA to prepare a new software tool to replace AirControlNET. The purpose of the software development is to better enable EPA to meet current and future needs for modeling emission reductions and the costs associated with emissions reductions while also interfacing with other new tools and databases currently under development. This project consists of three main tasks:
(1) assess current performance of AirControlNET and make recommendations for improvements,
(2) finalize recommendations for the design of the new software tool, and
(3) create the new tool (currently called Control Strategy Tool, or "CoST").
We are scheduled to complete an interim version spring of 2007. A report that contains a review of the current ACN and initial recommendations for the software design is attached.

ACN is available for free by accessing the files as listed below. Documentation for the software is also included on this web site. Contact Larry Sorrels at 919-541-5041 or at sorrels.larry@epa.gov for more information. For more information on the software redesign project, please contact David Misenheimer at 919-541-5473 or at misenheimer.david@epa.gov.

For details on TTNWeb's file type icons, standard file formats, and how to use them, see the TTNWeb File Types page.

File Description

File Date

File Types

AirControlNET 4.1 Software
AirControlNET 4.1 User's Guide
AirControlNET 4.1 Development Report
AirControlNET 4.1 Control Measures Documentation Report
AirControlNET (ACN) Software Redesign

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