Sewer & Water Utilities

About Utility Services 

The Sewer Utility provides service to the Sanitary Sewer Service Area in Mequon that are not using septic and mound systems. The Mequon Water Utility services several communities in the area including Mequon, Thiensville and Bayside. There are still quite a few properties in this area that use a private well or water trust.

At your property location, you may receive both services, only water, only sewer or neither. If you are interested to find out what services are currently provided or available to you, please give us a call.

The City of Mequon’s overall mission is the provision of quality public services and adoption of thoughtful policies that serve to enhance and maintain the unique quality of life of our community.  Through the judicious use of community resources, the City is committed to managing growth, efficiently using tax dollars and making wise investments in our future.  Our success depends on our ability to offer quality and value to our taxpayers with the highest standards of accountability, responsiveness, economy and integrity.

Department Objectives FY2026

Sewer Utility Projects and Objectives:

Detailed below are projects or elements that will influence the 2026 budget:

• Continue efforts towards compliance with the CMAR, CMOM and MMSD Chapter 13 programs.
• Fill the Utility Manager position.
• Ensure that appropriate condition assessments are conducted on sewer assets.
• Confirm the existence of any sanitary system components that do not function according to established reliability standards.
• Continue collection system staff training on operations and potential hazards and provide proper equipment and safety gear.
• Continued to collect and update City’s infrastructure data, easement records and incorporate into GIS.
• Bid and construct capacity improvements with relief sewers Ranch Road Lift Station E.
• Coordinate with MMSD on a private property lateral replacement project.
• Perform outreach for easements for potential onsite wet-weather storage site in easements at Fieldwood Drive LS G and Riverdale Park LS F.
• Evaluate feasibility for sewer system capacity improvements at the Port Washington Road Fire Station in the LS E basin, as no easement is required for system storage on City owned land at the Port Washington Road Fire Station in the LS E basin.
• Design capacity improvements in the Fieldwood Drive Lift Station “G” area to Glen Oaks Lane contingent upon wet weather storage in potential easement areas.
• Advertise for Bid the Lift Station E replacement at 2010 Ranch Rd (extended). Contract for the assessment of Heritage Siphon, the River Road Lift Station D iron pipe crossing under the Milwaukee River, and Lac du Cours cast iron laterals.
• Prepare a contract for the assessment of Heritage Siphon, the River Road Lift Station D iron pipe crossing under the Milwaukee River, and Lac du Cours cast iron laterals.
• Evaluate SCADA upgrades.
• Identify pumps for replacement in 2026.
• Add onsite generators to lift stations that currently do not have any and replace older obsolete generators (Finalize easements, address any zoning requirements and award contracts for generator installations at lift stations H,Q & K).
• Evaluate storm drainage conditions in Ravine Farm outlot along sanitary sewer easement, and determine if scour protection and any stabilization measures are necessary in 2026 budget.
• Acquire meters and compile data to evaluate Central Trunk sewers infill impacts near Mequon Road (STH 167) and Cedarburg Road (STH 57).
• Complete planning study of Central Trunk sewers that can allow for future development and infill, including flow equalization at Mequon Road (STH 167 & STH 57 intersection).
• Replace pumps and valves at Lift Station R, V, and I
• Replace onsite Generator and upgrade Generator Hut at Lift Station J
• New software, computers and radios for SCADA system upgrade
• New SCADA hardware (PLC, Radios, Antennas) at select Lift Stations 

Water Utility Projects and Objectives:

Detailed below are projects or elements that will influence the 2026 budget:

• Complete the standard meter replacement program in 2026. The 2026 goal is 300 meter replacements.
• Continue installing water meters when new customers are added. Staff has planned for 75 new customers in 2026, mainly in the Swan Ridge, Highland Meadows, Eastbrook, Enclave and The Grove developments.
• Continue the annual hydrant flushing and valve exercising program for system maintenance. Valves are exercised every three years and hydrants are flushed every two years.
• There are several water main extension projects that are proposed for FY2026:
  • Enclave - Phase IX
  • The Grove - Phase 2
  • Burr Oak Estates
  • Second Milwaukee Water Works (MWW)
• Connection System Loop • Continue to investigate the elevated non-revenue water.

Water Service Line Material Inventory

Lead is not found in Mequon's source water, Lake Michigan, and it is not found in our treated drinking water. Lead may enter drinking water at a house or building if it dissolves from materials and components associated with service lines and home plumbing, especially when water stands unused for several hours. To prevent lead from dissolving into the water, Milwaukee Water Works and the North Shore Water Commission add phosphate that forms a protective coating inside pipes. The Mequon Water Utility has NO lead water mains and NO lead service lines. Lead may be found in home plumbing – in some solder used with older copper plumbing (before 1986) and in faucets and fittings of brass which contain some lead (prior to 2014). If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. 

See the Mequon Water Utility Service Line Material Inventory (PDF) for a full listing of every service in the Utility and the service line material. The inventory was developed by reviewing the following sources: 

• Previous Material Evaluations: The Utility did not identify any lead services in any previous iterations of the required lead sampling.
• Construction Records and Plumbing Permits: The City and Villages served by the Mequon Water Utility enforce SPS plumbing codes which have not allowed lead laterals since before the water utility began service in 1998.
• Water System Records: Mequon Water Utility Standard Specifications for Land Development has not allowed lead as a service lateral material since the inception of the water utility. HDPE plastic has been the required service lateral material since 1998. Private plumbing code has also allowed the use of copper as an approved plumbing material for the private service lateral
• Distribution System Inspections and Records: A combination of service line repair records, meter installation records, distribution system maps, and other inspection records were reviewed for recorded material information.
• Lead Ban: The Federal Lead Ban of 1986 was used. Any service installed after 1986 is non-lead.
• General staff knowledge: this included institutional and anecdotal knowledge gathered from staff experience. No Utility employee has ever encountered a lead lateral in the Utility.