Your Partner in Clean Water
We are more than just a wastewater treatment plant.
For about 100 years, Madison Metropolitan Sewerage District has worked to protect public health, the environment and local waters through service, reliability and sustainability.
Upcoming Events
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May 22
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May 22Coffee Reception for Wastewater Professionals Appreciation Day9:00 am - 9:45 am
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May 29Commission Meeting (In Person)8:00 am - 11:00 am
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Jun 6June First Friday Tour12:00 pm - 1:30 pm
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Jun 12Commission Meeting (In Person)8:00 am - 11:00 am
Show appreciation for wastewater professionals on May 22
The District is delighted to join utilities around Wisconsin to celebrate Wastewater Professionals Appreciation Day on Thursday, May 22.  
#HardWaterHacks – How hard water affects coffee and tea machines
The white stuff that coats the inside of your coffee pot or tea kettle is scale, and it’s a constant companion when you’re brewing your favorite hot drink.
Upcoming sanitary sewer project will impact traffic near west UW-Madison campus, VA Hospital and University Hospital
The Highland Ave. Sewer Project, a major sanitary sewer construction project to install critical wastewater infrastructure, starts Monday, May 12.
Project spotlight: Mills Street sinkhole repair
A sinkhole that formed on Mills Street in Madison in fall of 2024 called upon the skills and resources from multiple District workgroups.
Highland Ave. Sewer Project begins Monday, May 12.
See project stages, traffic impacts, suggested detours and more.
Business opportunities, contracts and RFPs
Current Construction Projects
What's okay to flush? What's trash?
Reduce salt use at home
Take a plant tour
Work worth doing
Our most requested
COMMISSION
Find meeting materials and meet our Commissioners
Contracting CENTER
Find current business and contracting opportunities with the District
PHONE NUMBERS
Important phone numbers, hours, maps and more
Be a Salt Saver
Learn how to reduce salt use in your home
CAREERS
Search job opportunities and learn more about our hiring process
District FAQs
Find frequently asked questions and resources here
Our promise to you
Our Mission
Protect public health and the environment
Our Vision
Enrich life through clean water and resource recovery
Our Values
Service, reliability and sustainability
