Water and Wastewater Treatment

More than 16,000 publicly owned water resource recovery facilities operate in the United States. Skilled engineers and operators work together to ensure new and updated facilities continue to protect public health and the environment.


The latest water and wastewater articles, videos, and other content from throughout the organization and across the water sector.

Industrial Water Resources
U.S. EPA Proposes Drinking Water Regulations for PFAS

On March 14, 2023, the U.S. EPA proposed a National Primary Drinking Water Regulation (NPDWR) to establish legally enforceable Maximum Contamination Levels (MCLs) ...

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Words on Water #233: Paul Bishop on Becoming Water Professionals International

🎧 Paul Bishop is the Chief Executive Officer and President of Water Professionals International. In this podcast, Paul explains the impact the name change to Water ...

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WEF Seeks Applications for Utility of the Future Today Recognition Program

The application period is open for the Utility of the Future Today recognition (UotFT) program. Applications are due by April 12, 2023,11:59 p.m. ET.

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That New Book Smell

Now that my copy of the 24th Edition of Standard Methods for the Examination of Water and Wastewater has arrived, I once again realized that there is nothing like ...

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Water Environment Federation Launches Fifth Intelligent Water Systems Challenge

The Water Environment Federation (WEF) announces the Intelligent Water Systems Challenge is set to once again challenge participants to use innovation and data to ...

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Emergency Response
Hear from the WEF Chief Medical Officer

Dr. Andrew Sanderson, MD, MPH of Howard University, discusses the connection between public health, environmental justice, and the water sector.

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Water and Wastewater Treatment Resources

The featured resources below are just a sample of everything WEF has to offer. Search our entire website and technical resource database for more.


Design of Water Resource Recovery Facilities

The 6th edition of WEF Manual of Practice No. 8 is the principal reference for contemporary facility design practices of wastewater engineering.

Get MOP 8

Schroepfer Innovative Facility Design Medal

This medal recognizes excellence in conceiving and directing the design of a project to achieve substantial cost savings or economic benefit while achieving environmental objectives.

More about the Schroepfer Medal

Planning, Design, and Implementation for New and Upgraded Water Resource Recovery Facilities

The second edition of WEF Manual of Practice No. 28 serves as a guidance document to help utility managers and others, such as city engineers, public works directors, regulators, and contractors, navigate this process.

Get MOP 28

LIFT Intelligent Water Systems Challenge

This challenge seeks to foster the adoption of smart water technologies by showcasing the ability of intelligent water systems to effectively leverage data for better decisions.

More about the IWS Challenge
06 June


Save the Date for the WEF/IWA Innovations in Process Engineering 2023 Conference, taking place June 6-9, 2023 in Portland, Oregon. This conference is focused on innovations in treatment technologies and process engineering.

Learn More about IPE 2023

Find the Communities You Need


MRRDC serves as the home of WEF members who share common technical interests in municipal wastewater treatment design and are drawn together to be the stewards of this knowledge area. The community develops, recommends, supports, and conducts programs of general and technical information relating to the advancement of municipal wastewater treatment design practices.



This community's volunteers serve as WEF's technical resources on water recycling, from planning and public outreach to treatment processes and distribution. Community members develop workshops, technical sessions, books, and webcasts; author articles; and provide comment on water reuse policies and positions.

Join the Water Reuse Community

Join or Renew Your WEF Membership Today

Connect with our community of water professionals who ensure that our local communities have access to clean water that protects public health. Explore our member benefits and find the membership type that’s right for you.

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Visit Our Community Platform

This virtual workspace empowers WEF members to network and collaborate in an online environment.

See what's happening in the Community Platform


WEF is a source of high-quality technical resources featuring the latest research, news, and education. WEF's members and other credible resources have created and compiled this information into the Practice Area groupings listed in the dropdown menu.