Why Marengo's Water and Sewer Repairs Are So Expensive, and How the City Plans to Pay

Marengo's water and sewer system needs more than $25 million in work over the next decade. That is a large number for a city of 7,700 people, so it helps to break it down: about $5 million is deferred maintenance on pipes and treatment equipment that already exist, and over $20 million is for new capital projects. ¹ The city cannot issue bonds to cover any of it, which limits the options to grants, user fees, and incremental rate increases.

The numbers come from the city's first 10-year Community Investment Plan, presented to the council on March 9, and from a McMahon Engineering assessment presented in November that catalogued nearly $14 million in specific projects. ² The two figures overlap but tell the same story: decades of underinvestment have created a backlog that user fees alone cannot address.

The most urgent need is at the Wastewater Treatment Plant, where McMahon identified $5.2 million in immediate improvements: headworks, HVAC, oxidation ditch repairs, clarifier rehabilitation, an intermediate pump station, and a filter cleaning system. ² Another $1.7 million is needed for sanitary sewer maintenance and $1.7 million for water distribution. Longer-term, over $5 million is needed for water distribution pressure zone improvements and $510,000 for water tower repainting.

Meanwhile, the water and sewer fund does not collect enough in user fees to cover its own operating costs. Over the past decade, the fund has run an average deficit of $56,000 per year. ² The FY 2023-24 audit showed the system posted a net loss of $548,457 after depreciation and debt service. ³ The fund already carries $9.8 million in existing debt, primarily from an IEPA construction loan.

March 9, 2026 CIP; McMahon Engineering assessment; city budget

The city is not sitting idle. A $8.46 million Route 23 water and sewer extension is underway, largely funded by a DCEO state capital grant. ⁴ A new water treatment plant addition (the $7.4 million IHC Construction project) is nearing completion. Pay Application #19, for $452,199, appeared on the March 9 bills list. These are real investments. But they are expansion projects, not maintenance of what already exists.

Staff told the council in March that rate increases and a new capital fee are the only option. ¹ Each fee increment would generate approximately $120,000 per year. At that rate, addressing even the $5.2 million in urgent WWTP work would take decades of incremental fee revenue, absent grant funding or other sources.

Grant funding has been a significant part of the strategy. The city's state lobbyist, Joyce Nardulli ($25,000/year), was retained specifically to pursue capital bill funding, ⁵ and the results are tangible: $3.93 million in DCEO grants flowed into the water and sewer system in FY 2024 alone. ³ The 10-year Community Investment Plan, the first of its kind for Marengo, represents a shift toward longer-term planning rather than year-to-year budgeting.

Residents will see two effects. First, water and sewer rates will likely increase. No timeline has been announced, but the financial case was presented publicly in March. Second, water quality improvements are coming. A resident asked about manganese levels at the March 23 meeting. ⁴ The city has been communicating with residents about manganese in the water supply. The new treatment plant addition is expected to address this once it comes online.

For a city of 7,700 people, the scale of work is significant. The combination of state grant funding, the new CIP framework, and eventual rate adjustments gives Marengo more tools than it has had in the past. The challenge is sequencing: addressing the most urgent maintenance while continuing the expansion projects that position the city for growth.