Science & Technology
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About Our Research
The Office of Research and Development is EPA’s research organization, manages its research facilities, and leads the research planning process.
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Air Sensor Use and Study Design
Landing page for air sensor use and study information.
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How to Use Air Sensors: Air Sensor Guidebook
The air sensor technology market is expanding as more companies make lower-cost portable monitors available to the public.
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Past Research Projects Using Air Sensor Technology
Research projects by EPA are highlighted to show the types of studies that have been conducted to develop air sensor technology, evaluate performance and support air quality measurement needs by communities, industry and others.
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What Do My Sensor Readings Mean? Sensor Scale Pilot Project
Content to be provided later.
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Evaluation of Emerging Air Sensor Performance
This page provides research results of studies to evaluate the performance and accuracy of air sensor techology.
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EPA Unmix 6.0 Fundamentals & User Guide
Unmix seeks to solve the general mixture problem where the data are assumed to be a linear combination of an unknown number of sources of unknown composition, which contribute an unknown amount to each sample.
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Air Research
EPA's air research provides the critical science to develop and implement outdoor air regulations under the Clean Air Act and puts new tools and information in the hands of air quality managers and regulators to protect the air we breathe.
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Vapor Intrusion
Vapor intrusion occurs when there is a migration of volatile chemicals from contaminated groundwater or soil into an overlying building. Volatile chemicals can emit vapors that may migrate through subsurface soils and into indoor air spaces.
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Environmental Protection in Indian Country
EPA's efforts to protect human health and the environment of federally recognized Indian tribes by supporting implementation of federal environmental laws consistent with the federal trust responsibility, and the government-to-government relationship.
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Review of Well Operator Files
EPA conducted a survey of onshore oil and gas wells hydraulically fractured by 9 oil and gas service companies in 2009 and 2010.
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Investigation of possible wellbore cement failures during hydraulic fracturing operations
Researchers used the peer-reviewed TOUGH+ geomechanics computational software and simulation system to investigate the possibility of fractures and shear failure along vertical wells during hydraulic fracturing operations.
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AQS PEAT
AQS PEAT
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AQS Wind Speed and direction parameter change
AQS Wind Speed and direction parameter change
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Air Quality Dispersion Modeling - Alternative Models
Models, not listed in Appendix W, that can be used in regulatory applications with case-by-case justification to the Reviewing Authority as noted in Section 3.2, "Use of Alternative Models", in Appendix W.
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2020 Regional, State, and Local Modelers' Workshop
The 2020 Regional, State, and Local (RSL) Modelers' Workshop is being held at the Minneapolis Central Library in Minneapolis, MN from May 5-7, 2020. This page provides information on the agenda and registration for the RSL Modelers' Workshop.
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EPA response to RFC: Search Engine Results for Bromate
EPA response to the Request for Correction (RFC)
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RFC: Ozone and Nitrogen Oxides webpages
Request submitted by Forrest Mims
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RFC: Search Engine Results for Bromate
Submitted by David Smith
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EPA response to RFC: 11702 Perchlorate Advisory Levels
EPA response to the Request for Correction (RFC)