COVID-19 InformationInformation and Updates for Community Members

Contact Information

201 4th Street SE
Room 108
Rochester, Mn 55904 (Map)

Phone: 507-328-2400
Fax: 507-328-2401

Mon-Fri 8:00 am to 5:00 pm

Department Contacts


Sanitary Sewer 3
Sanitary Sewer Header

Sanitary Sewer System

Press Enter to show all options, press Tab go to next option

The Sanitary Sewer Collection System conveys wastewater from homes and businesses throughout Rochester to the Water Reclamation Plant for treatment. The sanitary sewer collection system consists of a network of gravity mains, force mains, inverted siphons, access structures, lift stations and pressure relief points. There are over 500 miles of city owned sewer pipe and over 12,000 city owned structures. In addition to structures owned by the city, there are over 28 miles of privately owned sewer pipe and 710 private owned structures that convey the wastewater to the Water Reclamation Plant.

2020 Sanitary Sewer Master Plan (J4340)

On February 24, 2020, Public Works staff presented the Draft 2020 Sanitary Sewer Master Plan to the Rochester City Council (click here for a video of the presentation). The Draft Master Plan prioritizes capital improvement projects for maintenance of aging or deteriorated infrastructure, as well as identifies where capacity constraints of the current system would limit future development. The Draft Master Plan also determined the infrastructure necessary to expand the system into undeveloped areas.

The City of Rochester pays for the initial construction of trunk sanitary sewer infrastructure into new developments and for trunk line improvements. Developers pay the City for this infrastructure via the Sewer Trunk Rates. As part of the Draft Master Plan, cost estimates were prepared for increased capacity and new line expansions in each of Rochester’s sanitary sewer zones, also known as “sewersheds.” The Sewer Trunk Rates in the Draft Master Plan were based on the total cost of projects that would be required to serve the projected growth in the ultimate area divided by the acres that are available to be developed. Some sewersheds, such as Hadley Valley and Kings Run, have lower cost estimates because trunk lines sized for development currently exist and only line extensions would be required as development occurs. Other sewersheds, such as the South Zumbro, have higher cost estimates because development in these areas would require construction of significantly more infrastructure with less developable acres available.  

The Public Works Department will bring the final 2020 Sanitary Sewer Master Plan to Council for approval on May 18, 2020.

Click here for the presentation slides from the February 24, 2020 to City Council. 

The complete Draft 2020 Sanitary Sewer Master Plan is available below for review.

Public comments on the Draft 2020 Sanitary Sewer Master Plan are being received through May 10, 2020.

Public comments and Poclo results will be compiled and shared with City Council in advance of the May 18, 2020 meeting.

Maintenance of the sanitary sewer collection system is performed by Infrastructure Maintenance Division and Water Reclamation Plant crews.  Maintenance activities details can be found on the following link:  Sewer System Maintenance