Science & Technology

Green Book Carbon Monoxide (1971) Area Information

Carbon Monoxide (1971)

EnviroAtlas Webinar Archive

EnviroAtlas is a web-based decision support tool that combines maps, analysis tools, downloadable data and informational resources that states, tribes and communities can use to help inform policy and planning decisions impacting their surroundings.

Rapid Benefit Indicators (RBI) Webinar Archive

RBI process for assessing restoration sites using non-monetary benefit indicators. The RBI approach uses readily-available data to estimate and quantify benefits to people around an ecological restoration site using indicators of nature’s value to people.

EPA Healthy Heart Program Webinar Archive

EPA is raising awareness of heart disease and its link to air pollution and other environmental factors as a partner in the Million Hearts, a national initiative to prevent 1 million heart attacks and strokes by 2017.

ORD's Key State Partners

List of national associations of state environmental and health agencies that partner and collaborate with EPA's Office of Research and Development.

The Growing Public Health Impact of Wildfire Smoke Emissions Webinar Archive

This is a brief discussion of wildfire smoke and its health effects along with tools available to provide public health guidance during wildfire events, including the Wildfire Smoke Guide for Public Health Officials

Health Impacts of Near Roadway Air Pollution and Mitigation Strategies Webinar Archive

Webinar on the latest science on the health impacts from near roadway exposures and discuss solutions and programs that states & community and transportation planners can consider to protect public health from the health impacts of near roadway exposures.

Air Quality Monitoring and Community Science Webinar Archive

This webinar focuses on EPA’s research that is advancing the development and evaluation of air sensor technology and helping communities learn more about their air quality.

U.S. Government’s International Methane Mitigation Activities: 2018 Accomplishments

The U.S. Government’s Global Methane Initiative Accomplishments ANNUAL REPORT (2018)

Explore the Automotive Trends Data

Explore and download summary data with interactive figures and tables for the automotive trends report.

Climate Change Indicators: Snow and Ice

Snow and Ice

March 22, 2006 Documentation RFC: CHEMDAT8, RCRA, SCDM, SCDM Win, SIMS, STF, SPHEM, CHEM9, HHRAP, HHRAPCF, TreatDB, KowWin, PhysProp, Chemfate, Water9, and PBT Profiler Databases

Submitted by Walter Shaub, Ph.D.

How do the different parts of particulate matter (PM) fit together?

The various parts of PM in the NEI are related as follows. PM10-FIL > PM25-FIL because PM10-FIL includes PM25-FIL PM25-PRI = PM25-FIL + PM-CON This equation only applies at the process level. Because some sources only can report PM2.5 (due to test method differences), this equation does not apply to…

Last published: March 27, 2025

Definitions / Measurements - FAQ

Definitions and Measurements FAQs

Sulfur Dioxide Designations - Regulatory Actions

Regulatory actions associated with sulfur dioxide designations

Climate Change Indicators: Oceans

Oceans

How does PM2.5 relate to PM species such as EC, OC, SO4, NO3, PMFINE, and DIESEL-PM25?

Primary PM2.5 estimates are speciated into the five PM species in the NEI: elemental (black) carbon (EC), organic carbon (OC), nitrate (NO3), sulfate (SO4), and the remainder of PM25-PRI (PMFINE). Diesel engine PM25-PRI and PM10 emissions are also labeled as DIESEL-PM25 and DIESEL-PM10 for mobile source diesel engines. For all…

Last published: March 27, 2025