Water Contaminant
Information Tool
A Versatile and Secure Tool for the Water Sector
The U.S. Environmental Protection Agency (EPA) is committed to ensuring the safety of the
nation's water supply. A key part of EPA's commitment is protecting drinking water and wastewater
systems from the effects of intentional or accidental contamination. WCIT — the Water Contaminant
Information Tool — is a powerful new information resource for water utilities, public health officials,
and agencies responsible for the safety of water supplies. Along with other EPA efforts such as early
warning detection systems, WCIT is a major element of EPA's support of water utility incident
prevention and detection capability.
Introduced in late 2005, WCIT is a password-protected online database that currently contains
information on 93 contaminants of concern: chemical, biological, and radiological substances that pose a
serious threat if introduced into drinking water or wastewater systems.
WCIT's functionality, and the data in it, were shaped and validated by water utility professionals,
scientists, and public health experts. EPA established a User Workgroup, consisting primarily of water
utility representatives, to provide guidance on WCIT's content design and functionality. A WCIT
Expert Workgroup, including authorities on chemical and pathogen properties, fate and transport,
contaminant monitoring, and health effects, reviewed all technical information and continues to provide
feedback on current and planned WCIT data. Unlike other resources or databases, WCIT supports
water-specific data (not just general data on environmental contamination). Moreover, WCIT covers
both regulated and non-regulated contaminants, including data on many substances — such as chemical
warfare agents — for which information is not readily available.
Supports Planning, Response, Training, and Research
WCIT supports preparedness planning, incident response, response training, and contaminant research:
Planning - WCIT provides in-depth information needed to update and maintain Emergency Response
Plans. WCIT supports development of site-specific response guidelines and can aid utilities in making
decisions about facility infrastructure during planning for system expansions or upgrades.
Response — For incident response, WCIT provides quick access to vital information, including
drinking water and wastewater treatment recommendations and drinking water and wastewater
infrastructure decontamination processes. WCIT includes easy access to reports that summarize useful
information that can be used to communicate with the public and with the news media.
Training — WCIT is a highly practical tool for table-top drills and emergency exercises needed
to ensure readiness. For example, federal authorities have used WCIT as part of disaster planning
exercises. The depth of information in WCIT makes it an ideal resource for formal or informal
training programs.
Research — WCIT supports gap analysis efforts cataloging research in areas such as infrastructure
decontamination.
Water Contaminant Information Tool (WCIT)
Prevention
• Planning
• Training
Detection
• Analytical and
screening procedures
Response
• Wate r/wa ste wate r
treatment data
• Emergency Response Plans
Recovery
• Infrastructure
decontamination
information
Water Security Division
Office of Water • EPA817-F-07-001 • www.epa.gov/watersecurity • February 2007
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WSD • Water Contaminant Information Tool
Detailed Contaminant Information Listed
For each contaminant, WCIT contains detailed information describing the substance, its
behavior in water, and potential health effects. WCIT information includes:
• Name, Chemical Abstracts Service (CAS) ID
• Physical or pathogen properties
• Availability
• Fate and transport
• Medical and toxicity information
• Early warning indicators
• Field detection and analysis information
• Drinking water and wastewater treatment
• Environmental impacts
• Infrastructure decontamination
Up to Date
Over time, EPA will add new contaminants and data fields to WCIT as EPA and its water
sector partners identify additional needs or data sources. EPA is committed to keeping
the data in WCIT up to date as new research is published. For example, in late 2006,
EPA added 45 new contaminants of concern to WCIT, as well as information on drinking
water and wastewater treatment and infrastructure decontamination.
Intended Users
WCIT contaminant data are considered sensitive, so EPA restricts access to the tool to
individuals in the water sector. Eligible organizations include:
• Drinking water and wastewater utilities
• State drinking water primacy agencies (and their regional and local agencies)
• Drinking water and wastewater associations partnering with EPA
• State and local public health officials
• Federal officials (including government laboratory staff)
• State laboratories
How to Register for WCIT
Registering to use WCIT is easy and free. To apply for
access to WCIT, visit http://www.epa.gov/wcit or
https://cdx.epa.gov.
For More Information
For more information on WCIT, visit www.epa.gov/wcit
or contact the WCIT Help Desk at WCIT@csc.com.
Information on EPA's Water Security Division and WSD
activities, tools, products, and the latest scientific advances
to protect drinking water and wastewater utilities is
available online at www.epa.gov/watersecurity.
Office of Water • EPA817-F-07-001 • www.epa.gov/watersecurity • February 2007
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