PHA United States	^ce
Environmental Protection
^^^1	Agency	December 2017
Industrial Wastewater Treatment Technology
Database (IWTT) Web Application
EPA has released the Industrial Wastewater Treatment Technology Database (IWTT) as a publicly accessible
web application. IWTT presents industrial wastewater treatment technology performance data from peer-
reviewed research articles as a web-based database application to provide public access to this useful
resource. IWTT can be used for many purposes including investigating established and emerging treatment
technologies, identifying technologies that can treat a particular pollutant, and understanding the motivation
behind installation of new treatment at and industrial facility.
To use the IWTT Web Application, go to EPA's website at:
What questions can IWTT help me answer?
IWTT can help answer questions like:
	What pollutants can be removed using an existing treatment technology (and what has been the percent
removal and/or influent and effluent concentrations)?
	What treatment technology or technologies are being used to remove particular pollutants or categories of
pollutants (e.g., metals, priority pollutants) from industrial wastewater?
	What new or existing treatment technologies are being developed or improved by a particular industry?
	What new treatment techniques or strategies are being used to improve treatment performance?
	What is motivating innovation, development, and implementation of new or upgraded treatment systems?
EPA developed IWTT to compile performance data for industrial wastewater treatment technologies into a
comprehensive, readily searchable database. IWTT contains information from over 200 peer-reviewed articles
that document the performance of new and improved industrial wastewater treatment technologies. Over
time, EPA plans to expand the information in the database and improve the web application to make IWTT
even more useful.
What types of information can I find in IWTT?
IWTT is a collection of information from peer-reviewed and technical literature containing data from pilot- and
full-scale industrial wastewater treatment systems. IWTT data sources include research journals, industry
trade group publications, and conference proceedings. IWTT contains comprehensive bibliographic
information from each publication and catalogs all technical data available in the publication. You can find
more details about the information in IWTT by reading Table 1.

Table 1. Overview of Information Captured in IWTT
Information about the Paper
Treatment Technology Information
Pollutant Removal Performance
 Article reference information
 Relevant point source category,
 Pollutant parameter name and
SIC and NAICS codes
CAS Number
 Key findings
 Scale (pilot or full)
 Analytical method
 Motivation (e.g., meet effluent
 Treatment system units
 Influent and effluent detection
limits, cost savings, water reuse,
comprising the system (in order
capacity increase, remedy
of the treatment train)
 Influent and effluent
environmental impairment, resource
 Operating parameters (e.g., pH,
concentrations and qualifier flags
treatment chemicals)
 Reported percent removal
 Type of wastestream (e.g., process
 Narrative description of the
 Effluent limits required for
wastewater, commingled
stormwater, and process
 Wastewater discharge type

(direct or indirect)

 System manufacturer

 Cost information

IWTT organizes this information in the following categories:
	Treatment systems: treatment units included in the system, unit order, and treatment chemicals used.
	Industries: industry or industries for which has the technology has been tested.
	Pollutant parameters: pollutants removed by the technology, including influent and effluent
concentrations and wastewater quality, percent removals, and analytical detection methods when
	Motivation: stated reason for industry to evaluate or employ the new technology.
How do I find information in IWTT?
IWTT has two search modes to help you find the most useful information. Guided Technology Search allows
you to search by industry, treatment technology, or pollutant to drill down to the most relevant data. Article
Search allows users to identify industrial wastewater treatment data sources by searching bibliographic
information or treatment performance criteria.
How is EPA using IWTT?
EPA issues national, technology-based industrial wastewater regulations called effluent guidelines and
pretreatment standards and is required to review them annually. EPA plans to use IWTT when conducting
these reviews as a source of treatment technology performance information. IWTT helps assess new
technologies and technology improvements that industry is using to treat wastewater. Stakeholders can also
use IWTT to find technologies that treat pollutants that are not currently regulated by effluent guidelines or
pretreatment standards or that provide better treatment than currently required.
Where can I find more information?
The IWTT Web Application is available on EPA's website at:
EPA is interested in feedback on the web application and uses of the database. If you would like further
information, have ideas to share, or have specific questions about IWTT, please email Phillip Flanders of EPA's
Office of Water, Engineering and Analysis Division, at: