Science & Technology

2011 National Emissions Inventory (NEI) Technical Support Document

Explains the sources of information in the inventory; show what sources of data used for each sector; and provide more information about the components.

Air Emissions Inventory Guidance Documents

A collection of documents that provides the latest available guidance on developing emissions inventories to meet State Implementation Plan requirements

Sharing Facility Data Between Air Data Systems

This document provides definitions of facility attribute data fields used in the Facility Registry Service (FRS) Facility Widget and explains the relationship of those fields to the Emissions Inventory System (EIS).

2008 NEI Technical Support Document

The 2008 NEI is a national compilation of emissions sources collected from state, local, and tribal air agencies as well as from emissions information from the EPA emissions program.

2014 National Emissions Inventory (NEI) Technical Support Document (TSD)

Explains the sources of information in the inventory; show what sources of data used for each sector; and provide more information about the components.

Tribal Governments’ Environmental Projects Grow in Region 7

EPA Region 7 is committed to assisting tribes strengthen their abilities to manage environmental programs in Indian Country, and to ensure that tribes have a voice in decisions that affect their land, air and water.

Tribal Water Systems in the Midwest

EPA Region 7 is offering free lead service line (LSL) inventory technical assistance to eligible Tribal Community Water Systems (CWS) and Non-Transient, Non-Community Water Systems (NTNCWS).

Clearinghouse for Inventories and Emissions Factors (CHIEF)

Emissions inventories, modeling, and monitoring are the basis for understanding, controlling and tracking stationary sources of air pollution. This technical site provides access to tools and data to support those efforts.

Technical Resources and Studies

Monitoring Unregulated Contaminants in Drinking Water

Provides the Unregulated Contaminant Monitoring Rule requirements and the monitoring results (data).

Indicators: Physical Habitat Complexity

Physical habitat complexity measures the amount and variety of all types of cove at the water’s edge in lakes. In general, dense and varied shoreline habitat is able to support more diverse communities of aquatic life.

Biosolids

Explore key documents and learn about the scientific basis for biosolids management, including application to soils.

Fish and Shellfish Program Newsletter - 2023

Integrated Approach Monitoring Strategy

Sporlan Valve Plant 1 Superfund Site, Washington, Franklin County, Missouri - Fact Sheet, July 2016

EPA to Host Public Availability Session

Equistar Chemicals, LP Facility - Clinton, Iowa - Fact Sheet, May 2018

Public Comment Period for Draft RCRA Operating Permit

Standard Operating Procedures for Long Term Archiving of Filters in the Chemical Speciation Network (CSN)

This page contains a link to the Standard Operating Procedures for the long term archiving of CSN filters.

Chemical Speciation Network - Parameters Reported to the Air Quality System (AQS)

This page includes measurements made in the chemical speciation network

Chemical Speciation Network (CSN) - General Information

This is the homepage for EPA’s PM2.5 Chemical Speciation Network (CSN). The CSN is an ambient monitoring network comprised of the Speciation Trends Network (STN) and supplemental sites.

Standard Operating Procedures for the Analysis of Ions in Chemical Speciation Network (CSN) Samples

Standard Operating Procedures (SOP) for the analysis of ions in Chemical Speciation Network (CSN) samples