Science & Technology

PM2.5 Data Omitted from Air Trends Assessment

Describes PM2.5 data that is omitted from EPA's annual trends assessment.

Best Practices for Preparation of Multi-Agency Exceptional Events Demonstrations

This is intended to assist air agency staff and other interested parties in preparing demonstration components, analyses and other documentation to support exceptional events submittals.

2007 to 2016 Exceptional Events Rule Crosswalk

This document is intended to assist air agency staff and other interested parties in preparing demonstration components, analyses and other documentation to support exceptional events submittals.

Exceptional Events Documents Ozone - Washoe, NV

Exceptional Events Documents Ozone - Washoe, Nevada

EPA Review Technical Support Document Template for Wildfire/Ozone Events

This document is intended to assist air agency staff and other interested parties in preparing demonstration components, analyses and other documentation to support exceptional events submittals.

Data Summary of The First Unregulated Contaminant Monitoring Rule

Data summary and analytical results of the First Unregulated Contaminant Monitoring Rule (UCMR 1).

Data Summary of The Second Unregulated Contaminant Monitoring Rule

Data summary and analytical results of the Second Unregulated Contaminant Monitoring Rule (UCMR 2).

Data Summary of The Fourth Unregulated Contaminant Monitoring Rule

Data summary and analytical results of the Fourth Unregulated Contaminant Monitoring Rule (UCMR 4).

Data Summary of The Third Unregulated Contaminant Monitoring Rule

Data summary and analytical results of the Third Unregulated Contaminant Monitoring Rule (UCMR 3).

Cost Reports and Guidance for Air Pollution Regulations

Web page for EPA's Control Cost Manual and Cost Reports

Air Toxics Screening Assessment

The Air Toxics Screening Assessment, or AirToxScreen, is EPA's review of air toxics in the United States, based on modeled air quality. We developed AirToxScreen as a tool for state, local and tribal agencies, and we use its results as well.

Success Stories and Case Studies

Climate success stories are helpful for general educational purposes and for use by states, Tribes, local governments, and stakeholders to take climate adaptation action.

Media and Listservs

List of free EPA and other federal government water and climate newsletters, listservs, and podcasts.

Green Chemistry

EPA's Green Chemistry Program; including definition of green chemistry and description of the program's mission and activities

Climate Change Research Publications in the Science Inventory

A list of journal articles, reports and other published research related to climate change research

Positive Matrix Factorization Model for Environmental Data Analyses

Positive Matrix Factorization is a receptor model developed by EPA to provide scientific support for current ambient air quality standards and implement those standards by identifying and quantifying the relative contributions of air pollution sources.

Sanitary Surveys for Recreational Waters

Advancing Lead Exposure and Biokinetic Models

Highlights of EPA models for lead risk assessment and cleanup; IEUBK model.

Combining Data into Complete Engine ALPHA Maps

The National Center for Advanced Technology (NCAT), part of the National Vehicle and Fuel Emissions Laboratory (NVFEL), assesses the effectiveness of advanced low emission and low fuel consumption technologies for a broad range of key light-duty vehicles.

Nitrogen Dioxide/Nitrogen Oxide In-Stack Ratio (ISR) Database

The EPA’s Guideline on Air Quality Models, Appendix W to 40 CFR Part 51, recommends a three-tiered screening approach to estimate ambient concentrations of Nitrogen Dioxide (NO2).