Science Inventory

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Water distribution systems are among the most critical civil infrastructure and must be prepared to withstand or quickly recover from any disruptive incident. With increasing threats to drinking water systems, including natural disasters, water shortages, power outages, bioterror...

Flowrates within premise plumbing systems (PPS) can be dramatically impacted by pressure loss or fluctuations, which can be the result of poor pressure in the distribution system or simultaneous multiple fixture use. Pressure dependent analysis (PDA) was introduced as a feature o...

This presentation provides a brief overview of the origins and history of the EPA, our water research program, and current water infrastructure modeling tools.

Real-time water distribution system (WDS) hydraulic models is being used in water utilities. The hydraulic models must be calibrated carefully before they are in use. Most existing calibration methods either require substantial computation resources or lack flexibility to link th...

Lead contamination of drinking water in homes and buildings remains an important public health concern. In order to assess strategies to measure and reduce exposure to lead from drinking water, models are needed that incorporate the multiple factors affecting lead concentrations...

The U.S. Environmental Protection Agency (EPA) is responsible for helping communities prepare for and recover from disasters that result in threats to public health and the environment. EPA’s National Homeland Security Research Center’s (NHSRC) mission is to focus on the research...

This presentation provides an overview of EPA ORD's drinking water models and tools, explaining when they can be used, and how to access them. These models and tools can be used by engineers, consultants, students, planners, regulators, and others to solve drinking water problem...

Please find below 4 links for downloading, installing and using the TEVA-SPOT graphical user interface (GUI) software. For the complete TEVA-SPOT-GUI software package, please download the ZIP file. A description of each of the 4 links, including the contents of the ZIP file, is...

The U.S. Environmental Protection Agency and Sandia National Laboratories have developed the Water Network Tool for Resilience (WNTR) to quantify resilience of drinking water distribution systems. WNTR is a Python package designed to simulate disaster sceanrios and analyze impact...

This report provides a summary of the various types of technical support requests that the United States Environmental Protection Agency&rsquo;s (EPA) Center for Environmental Solutions and Emergency Response (CESER), Water Infrastructure Division (WID) staff responded to during ...

The Water Security Toolkit (WST) is a suite of tools that help provide the information necessary to make good decisions resulting in the minimization of further human exposure to contaminants, and the maximization of the effectiveness of intervention strategies. WST assists in th...

The U.S. Environmental Protection Agency and Sandia National Laboratories have developed the Water Network Tool for Resilience (WNTR) to quantify resilience of drinking water distribution systems. WNTR is a Python package designed to simulate disaster scenarios and analyze impact...

What is EPANET? • Not an acronym! • Computer program (Microsoft Windows desktop or laptop software application) • Graphical user interface • Command line & Toolkit versions • Used for modeling and analyzing a water distribution system • Input is a pipe network layout • Out...

Updated User's Manual for EPANET

Pipe flow mixing with various solute concentrations and flow rates at pipe junctions is investigated. The degree of mixing affects the spread of contaminants in a water distribution system. Many studies have been conducted on the mixing at the cross junctions. Yet a few have focu...

Water infrastructure simulation models, such as EPANET and SWMM, have played a significant role in simulating water distribution, stormwater and sanitary sewer systems. These software packages have played an important, and varying, role to different portions of the water infrast...

Water quality in homes and buildings is impacted by a combination of the incoming water chemistry, characteristics of the unique plumbing system, and how the water is used. Modeling premise plumbing systems enables the examination of different aspects of hydraulics and water qual...

EPA/Community release of EPANET 2.2.0. EPA release of updated version of EPANET - EPANET 2.2.0. This release of EPANET 2.2.0 represents a collaboration with the EPANET developer community at Open Water Analytics (OWA) (https://github.com/OpenWaterAnalytics/EPANET). The EPANET ...

This journal article examines EPANET, which is widely employed to simulate water quality in water distribution systems. However, the time-driven simulation approach used to determine concentrations of water-quality constituents provides accurate results, in general, only for smal...

Journal Article

Journal article

The presentation is an invitational overview of the Water Network Tool for Resilience (WNTR). WNTR is a tool that members of the WFS’ could use to address disastrous risks to water systems. Sandia and the EPA are developing a wide range of capabilities to help water utilities do ...

Research summary for EPANET. EPANET was created by the US EPA in the 1990s out of a need to better understand water quality transport processes in water distribution systems. Work ceased in 2000 and it last received a minor update in 2008. In the intervening time, EPANET has bec...

Technical Brief

The presence of contaminants in drinking water premise plumbing systems (PPS) remains a significant public health issue. Water quality in plumbing can be affected by various factors such as pipe materials, pipe scales, water chemistry, and water usage patterns. Intermittent water...