Science & Technology

MOFAT: A Two-Dimensional Finite Element Program for Multiphase Flow and Multicomponent Transport

MOFAT is a two-dimensional, finite element model for simulating coupled multiphase flow and multi-component transport in planar or radically symmetric vertical sections.

Understanding PFAS in the Environment

Per- and polyfluoroalkyl substances, or PFAS, are a large group of manufactured chemical compounds that are used in many valuable consumer and industrial products.

SeqAPASS Version 4.0 Adds New Interactive Help Menus and Interoperability with Other Online EPA Tools

EPA scientists have recently released version 4.0 of the Sequence Alignment to Predict Across Species Susceptibility (SeqAPASS) tool.

Protecting Communities with Safe, Sustainable Materials Management

Construction and demolition debris (CDD)—or the solid waste generated by construction and demolition projects—represents a signiﬁcant portion of total solid waste ﬂow in the United States.

Meet EPA Researcher Stuart Willison, Ph.D.

EPA researcher Stuart Willison characterizes chemical contamination for a wide range of chemicals, including Chemical Warfare Agents and unregulated chemicals.

South Florida Ecosystem Assessment: Everglades Water Management, Soil Loss, Eutrophication and Habitat - EPA 904-R-00-003, September 2000

Documents 1993 to 1996 baseline conditions in the Everglades and Big Cypress prior to ecosystem restoration efforts.

Hydrocarbon Spill Screening Model (HSSM) en Español

HSSM simula el flujo de la fase LNAPL (líquidos livianos en fase no acuosa) y el transporte de un componente químico por estos líquidos desde la superficie hasta las napas freáticas.

Computational Toxicology and Exposure Online Resources

EPA's Safer Chemicals program produces a variety of computational tools to assist users in decision-making, researching, and evaluating chemical information. These tools offer a wealth of chemistry, toxicity, and exposure data that is publicly accessible.

Structured Decision Making: Increasing Community Resilience

This Structured Decision Making StoryMap explains the six-step SDM process and provides guidance for its use. Each section of the StoryMap provides details about a different step of the SDM process, supported by case study examples from across the U.S.

Community Case Studies: Practical Applications of Ecosystem Services and Structured Decision Making

Community Case Studies: Practical Applications of Ecosystem Services and Structured Decision Making tells the story of communities across the U.S. that have worked with EPA to address diverse community challenges using SDM concepts. This StoryMap uses maps

Risk Evaluation for Cyclic Aliphatic Bromide Cluster (HBCD)

EPA's existing chemicals programs address pollution prevention, risk assessment, hazard and exposure assessment and/or characterization, and risk management for chemicals substances in commercial use.

Virus Fate and Transport (Virulo) Model

This is a probabilistic screening model for predicting leaching of viruses in unsaturated soils.

Frequent Questions About EPA's Mercury Lamp Drum-Top Crusher Study

Frequent Questions such as "Why did we do the Mercury Lamp Drum-Top Crusher Study?", "Should drum-top crushers (DTCs) be used in the management of fluorescent lamps?", "Are drum-top crushers (DTCs) safe to use?"

Photos of the 2016 Friends of P3 Awards

Photos of the 2016 Friends of P3 Award Ceremony

National EPA-Tribal Science Council Presentation

U.S. EPA/STAR Tribal Progress Review

Viral Pathogen and Surrogate Approaches for Assessing Treatment RFA

Documents regarding Viral Pathogen and Surrogate Approaches for Assessing Treatment Performance in Water Reuse

Photos of the 2016 National Expo

Capture Zone Analytic Element Model (CZAEM)

CZAEM is a single-layer model for simulating steady flow in homogeneous aquifers using the Analytic Element Method. CZAEM generates output on ground water capture zones and residence times.

Next Steps for Request for Reconsideration, September 23, 2019

Next Steps for Request for Reconsideration, September 23, 2019 .

e-Manifest Demonstration Videos

Demonstration videos on how to use the e-Manifest system