Lease-Based Water and Wastewater Infrastructure for Municipalities

Financing and growth decision-making are being reexamined

Municipal water and wastewater leaders are taking a harder look at how infrastructure is funded because both the financial and operational realities have shifted. Capital costs continue to rise, making traditional upfront investment harder to justify as budgets compete with public safety, transportation, housing, and other essential services.

At the same time, long-range certainty has eroded. Growth projections change, development does not always follow a linear path, and regulatory requirements continue to evolve. Utilities are expected to plan for compliance and reliability without locking themselves into assets sized for assumptions that may not hold over time.

National data underscores the scale of unmet wastewater and stormwater investment needs, reinforcing the pressure on communities to sequence investments carefully. Delays or misalignment between infrastructure and growth carry real consequences, whether capacity falls behind development or aging assets require replacement sooner than planned. Water and wastewater projects often experience price increases that outpace inflation, widening the gap between early planning estimates and final construction costs.

Together, these forces are pushing municipalities to reconsider financing tools that allow progress today while avoiding premature commitments.

What “Lease-Based Infrastructure” Actually Means

In practical terms, lease-based infrastructure allows a municipality to move forward with water treatment or wastewater assets without purchasing the full system upfront.

Under a timeline-based lease, AUC Group builds and installs infrastructure while the municipality preserves operational control. This differs from BOO (Build-Own-Operate) models, where ownership and operations are fully outsourced. With the AUC Lease Plant Program, the system is delivered as permanent infrastructure, not temporary equipment, and is sized and phased to align with real project timelines.

The primary difference between leasing and traditional ownership is how capital is deployed. Instead of committing full funding upfront, municipalities make scheduled payments that align with growth, permitting, or near-term capacity needs.

Leases can include everything inside the fence, including treatment units, tanks, lift stations, electrical systems, site work, and access infrastructure. This approach avoids fragmented procurement and helps keep scope, cost, and delivery coordinated through a single framework.

Operational control remains flexible throughout the lease. Municipalities can:

• Operate with in-house staff
• Retain a preferred provider
• Add a dedicated AUC Operations & Maintenance (O&M) agreement to further reduce risk

That last option is common because it protects the asset with the same experts who designed and built it, while the municipality preserves capital flexibility.

Case Example: Pairing Lease-Based Infrastructure With Long-Term O&M

A lease-based wastewater treatment plant provides the physical capacity a community needs today, with the added option to integrate a long-term maintenance agreement to ensure peak performance and regulatory compliance over the life of the system.

A recent AUC project illustrates why municipalities often choose to pair infrastructure needs with a professional maintenance agreement. In this project, AUC was brought in to provide a comprehensive long-term maintenance agreement that focused on:

• Shifting from “reactive repairs” to a scheduled maintenance program that prevents costly downtime.
• Ensuring the plant consistently meets stringent discharge limits without straining the municipality’s internal resources.
• Providing 24/7 technical support to handle unforeseen issues immediately.

When Leasing Makes Sense for Managing Risk and Capital

Lease-based infrastructure is especially well-suited for communities experiencing rapid growth or development that unfolds in phases. In these situations, utilities often need capacity early but might not want a full build-out before demand is certain.

Timeline-based leases allow treatment assets to be added as needs materialize, supporting growth without locking the community into oversized infrastructure. This can be especially valuable for phased, decentralized treatment approaches where expansion is expected but timing is uncertain.

Leasing also helps when capacity is required before long-term funding is available. Projects facing tight delivery schedules, permitting constraints, or near-term compliance deadlines can move forward while preserving the flexibility to adjust scope or ownership later.

From a risk and capital perspective, leasing can help municipalities:

• Avoid overbuilding and paying carrying costs on underutilized assets
• Reduce upfront exposure through predictable scheduled payments
• Minimize the risk of being stuck with aging infrastructure that requires escalating repair costs

Key Questions Municipalities Should Ask Before Leasing

• What problem are we solving right now: near-term capacity, timing, capital constraints, or all three?
• How flexible does this system need to be as growth, regulations, or demand change?
• Which assets should remain adaptable versus fixed over the long term?
• How will this decision affect future ratepayers and capital planning?
• What options do we want to preserve for ownership, expansion, or full-service delivery later?
• Do we have the internal personnel and technical expertise to manage this asset’s long-term maintenance, or would a professional O&M agreement provide better regulatory security?

Intentional Strategy, Not a Hasty Fix

Lease-based infrastructure is not a shortcut or a temporary solution. It is a strategic tool that helps municipalities move forward when conditions are uncertain and capital must remain flexible. For many communities, leasing supports responsible stewardship by aligning infrastructure decisions with real demand, clear timelines, and evolving priorities.

Stop choosing between capacity and capital. You can deliver reliable water and wastewater infrastructure today without over-committing for tomorrow. Talk with AUC Group about whether a lease-based approach fits your growth, capital, and compliance timeline.