Science & Technology

Adverse Outcome Pathway (AOP) Research Brief

Technical Research Brief that describes EPA's approach to Adverse Outcome Pathway (AOP) research.

Alternative Means of Emission Limitation - Shell Oil Products U.S. Martinez Refinery

Signed final approval and fact sheet for the alternative means of emission limitation request for a multi-point ground flare from Shell Oil Products, Martinez Refinery

20th Annual EPA Drinking Water Workshop: Session 8

Session 1 bios and summary for the workshop.

Joint Principles for Preventing and Managing PFAS in Biosolids

Chemical Process Overview

CMAQ simulates the chemistry of airborne pollutants with a semi-integrated approach.

Improving the representation of monoterpene chemistry in CMAQ

CMAQ was used to simulate conditions during the the Southern Oxidant and Aerosol Study (SOAS) in the summer of 2013. Data collected as part of this study have been used to perform diagnostic model evaluation.

Trends in Air Pollution Exposure Using CMAQ

CMAQ simulations have been analyzed to investigate the historical trend in the long-term exposure to PM2.5 and PM2.5-related premature mortality (PM2.5-mortality); and to examine implications for future trends in human exposure to air pollution.

Research Highlights Archive

EPA scientists have primary responsibility for the continual development of CMAQ and its related models. There are currently a multitude of research projects underway that focus on a range of topics.

Indicators: Acidification

Acidification is a broad term that refers to the process by which aquatic ecosystems become more acidic. Acid rain and acid mine drainage are major sources of acidifying compounds, lowering the pH below the range where most living organisms function.

Indicators: Cyanotoxins (microcystin)

Algal toxins are toxic substances released by some types of algae (phytoplankton) when they are present in large quantities (blooms) and decay or degrade. High nutrient levels and warm temperatures often result in favorable conditions for algae blooms.

Building Fish and Shellfish Consumption Advisory Programs

Developing Fish and Shellfish Consumption Advisories

Climate Change Indicators: Leaf and Bloom Dates

This indicator examines the timing of leaf growth and flower blooms for selected plants in the United States.

Electric Vehicle Myths

Facts and myths about electric vehicles.

Analytical Methods

Sample Analysis

Sample analysis describes the process of testing a sample to determine the presence and concentrations of certain contaminants.

Analytical Methods, Fish Tissue Mass and Suitable Container Materials

Recommended aliquot weights, suggested method for analysis and appropriate container materials for various analyses.

Small Drinking Water System Variances

Small system variances allow a small system to install and maintain technology that can remove a contaminant to the maximum extent that is affordable and protective of public health in lieu of technology that can achieve compliance with the regulation.

Cost Model Documentation

WBS model documentation files.

Materials and Waste Management Research

EPA is developing data and tools to reduce waste, manage risks, reuse and conserve natural materials, and optimize energy recovery. Collaboration with states facilitates assessment and utilization of technologies developed by the private sector.