Science & Technology

Wellhead Protection Area (WHPA) Model

WHPA is a semi-analytical groundwater flow simulation program used for delineating capture zones in a wellhead protection area.

EPA Response to RFR 19001A appeal: issued 01/15/2020

This document is the IQG Executive Panel's final determination for this appeal RFR 19001A concerning the Bristol Bay Watershed Assessment

2021 Dera Tribal and Insular Area Grants - Closed Announcement FY 2021

EPA’s Office of Air Quality Planning & Standards is soliciting applications

RFR 17002A Withdrawal Letter Received 03/01/2021

Frequent Questions About the EMC

Frequent Questions about the Air Emission Measurement Center (EMC)

Addressing Emerging Contaminants in Wastewater Treatment Systems Webinar Archive

This EPA Tools & Resources webinar provides overview of work to develop a framework of wastewater treatment processes, focusing on removal rates of certain emerging contaminants, as well as associated life cycle costs and environmental impacts.

Meet EPA Scientist Rachael Leta-Graham

EPA scientist Rachael Leta-Graham (she/her) is a physical scientist interested in bridging gaps and finding common ground in environmental work performed by federal government and non-governmental organizations (NGOs). Since 2016, Rachael has served as the

Introduction to Using Excel Spreadsheets to Assist in Developing Quality Assurance Project Plans

Part of a tool designed to assist in developing a QAPP for projects that involve surface or groundwater monitoring or the collection and analysis of water samples.

Chemical and Products Database (CPDat)

CPCat (Chemical and Product Categories) is a database containing information mapping more than 43,000 chemicals to a set of terms categorizing their usage or function.

EPA Response to RFC 21001 that challenges the mathematical premise on which the Greenhouse Effect and Greenhouse Gases are based

EPA Response to RFC 21001 that challenges the mathematical premise on which the Greenhouse Effect and Greenhouse Gases are based.

Particle Pollution Exposure

Health Effects in the General Population

Learn about the Particle Pollution and Your Patients' Health Course

About This Course

Discussion Framework for Development of a Draft Water Reuse Action Plan

Draft National Water Reuse Action Plan

Information related to the Draft National Water Reuse Action Plan.

What is the Enhancing State and Tribal Programs Initiative?

Information about state and tribal wetlands programs.

Hydrocarbon Spill Screening Model (HSSM)

The model is intended to address the problem of LNAPL flow and transport from the ground surface to a water table aquifer.

BIOSCREEN, Natural Attenuation Decision Support System

The model is designed to simulate biodegradation by both aerobic and anaerobic reactions.

BIOPLUME III

BIOPLUME III is a two-dimensional finite difference model for simulating the natural attenuation of organic contaminants in groundwater due to the processes of advection, dispersion, sorption, and biodegradation.

Remediation Evaluation Model for Fuel hydrocarbons (REMFuel)

This model simulates the transient effects of groundwater source and plume remediation for fuel hydrocarbons.

Best Management Practices (BMPs) Siting Tool

Overview, download, impacts and helpful resources associated with the Best Management Practices (BMPs) Siting Tool