Data and Tools
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Nitrogen Dioxide Trends
National and regional trends in ambient NO2.
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Particulate Matter (PM2.5) Trends
National and regional trends in ambient PM10 and PM2.5 concentrations.
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Sulfur Dioxide Trends
National and regional trends in ambient SO2 concentrations.
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Carbon Monoxide Trends
National and regional trends in carbon monoxide.
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Previous Air Quality Trends Reports
Link to archive of historical air quality trends reports
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Air Quality - National Summary
National summary of air quality trends and status
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Modeling Off-Site Transfers in RSEI
Information on how RSEI models off-site transfers to produce scores and other RSEI metrics
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Fact Sheet: BEACH Act Locational Data
Fact Sheet: BEACH Act Locational Data
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National Nonpoint Source Pollution Control Program - Basic Training
National Nonpoint Source Pollution Control Program - Basic Training
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Human Respiratory System Model
The Human Respiratory System Model is a 3-D computational fluid dynamics (CFD) model of the human respiratory system. The model is based on human scan data and can be adapted on the fly to account for age, ethnicity, and sex.
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Examples for Assessing Program Effectiveness Through Evaluation
Information related to Develop Risk Communication Programs for Fish and Shellfish Consumption Advisories - Examples for Assessing Program Effectiveness Through Evaluation
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Framework for Effective School IAQ Management
Resources to develop your own program for indoor air quality in schools
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Nutrient Explorer Webinar Archive
This EPA Tools & Resources webinar highlights EPA’s Nutrient Explorer – a downloadable tool for modeling relationships between watershed land use, climate, and other variables and surface water nutrient concentrations.
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Use of Electronic Health Records to Address Pressing Environmental Health Concerns Webinar Archive
Webinar archive for webinar on use of EHRs to address health concerns
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Fifth National Climate Assessment: Resources and Interactive Atlas Webinar Archive
This EPA Tools & Resources webinar, recorded on January 15, 2025, provides an introduction and overview of the 5th National Climate Assessment.
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State Engagement Numbers and Highlights
The ORD State Engagement Numbers and Highlights infographic contains annual data (webinar series, meetings with states & regions, EPA-ECOS-ASTHO PFAS Science calls) and recent highlights (projects & pilots, focused meetings, listening sessions).
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Comparison: Your Car vs. an Electric Vehicle
new testing page3 for JS
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Test Data for Annual Fuel Economy Guide
Data files for the Fuel Economy Guide are provided in CSV format for import into databases or spreadsheets.
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Recalls of Vehicles and Engines
n cases where EPA has determines that manufacturers have provided inaccurate, incomplete or falsified certification information or failed to keep required records, the Clean Air Act gives the EPA the authority to void certificates.
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12th Conference on Air Quality Modeling
The 12th Conference on Air Quality Modeling, mandated by Section 320 of the Clean Air Act, held on the EPA RTP Campus from October 2nd through 3rd, 2019. This is a public hearing on regulatory air quality model and technique development.