Science & Technology
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Maps
eGRID Maps
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Clinical Studies in Environmental Health
Recruit volunteers for research to discover how humans respond to pollution. This will EPA can make better recommendations to Congress/State/Local governments with the laws that protect us.
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National Emission Standards for Hazardous Air Pollutants (NESHAP) Part 61 in Arkansas
National Emission Standards for Hazardous Air Pollutants (NESHAP) Part 61 in Arkansas.
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Other Rules in Arkansas
Other Rules in Arkansas
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Ozone Layer Protection
Science information about Earth's stratospheric ozone layer protecting humans and earth from the sun's ultraviolet (UV) rays
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Safer Chemicals Research
EPA's Chemical Safety research protects human health and the environment by evaluating chemicals for potential risk and providing tools and guidance for improved chemical production that supports a sustainable environment.
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Research Fellowships
This site supports fellowship competitions and tracks awarded projects and their results
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Urban River: Merrimack River
Information on the efforts of the US EPA, the Commonwealth of Massachusetts, the municipalities within the Merrimack River and nongovernmental organizations to improve the water quality of the Merrimack River.
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Sulfur Dioxide (SO2) Air Quality Standards - Documents Prior to Review Completed in 2010
Sulfur Dioxide (SO2 Secondary) Air Quality Standards - Documents Prior to Review Completed in 2012
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Ozone (O3) Standards - Planning Documents from Review Completed in 2015
The planning phase of the NAAQS review process begins with a science policy workshop. Drawing from the workshop discussions, EPA prepares an Integrated Review Plan (IRP).
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Ozone (O3) Standards - Risk and Exposure Assessments from Review Completed in 2015
Scientific and technical risk and exposure assessments used to develop the current ozone national ambient air quality standard.
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Interim Final Guidance: Developing Risk-Based Cleanup Levels at Resource Conservation and Recovery Act Sites in Region 10
This guidance is intended for use by EPA Region 10 personnel and RCRA-regulated facilities undergoing corrective action or clean closures in Region 10 (Alaska, Idaho, Oregon, Washington).
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Swimming Beaches
An assessment of water quality trends at swimming beaches in the Salish Sea. Part of the U.S. EPA and Environment and Climate Canada's Health of the Salish Sea Ecosystem Report.
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BenMAP in the Cloud
The BenMAP-CE tool estimates the number and economic value of health impacts resulting from changes in air quality - specifically, ground-level ozone and fine particles. Learn what data BenMAP-CE uses and how the estimates are calculated.
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Climate Change Indicators: West Nile Virus
This indicator tracks the rate of reported West Nile virus disease cases across the United States.
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Climate Change Indicators: Lyme Disease
This indicator tracks the rate of reported Lyme disease cases across the United States.
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Modeling Toxic Air Pollutants - CMAQ
The CMAQ system can be used to predict the concentration and deposition of many Hazardous Air Pollutants.
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CMAQ Metadata
The following documents describe annual adjusted Community Multi-scale Air Quality (CMAQ) deposition fields for the years 2002-2012 and for 2025.
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CMAQ Developers Guide
The CMAQ Developers Guide describes general development practices within the CMAQ system and directions on how to contribute source code to the EPA CMAQ GitHub repository.