Water & Wastewater Treatment

Lift stations do not have a graceful failure mode. A wastewater pump station that loses power stops moving sewage, and sewage does not wait. Wet wells fill, and when they overflow, the raw wastewater goes somewhere it is not supposed to go. That event triggers a sanitary sewer overflow (SSO) notice to the state environmental agency, potential EPA enforcement, community health risk, and cleanup costs that can dwarf the cost of the generator system that would have prevented the event. Water and wastewater utilities understand this calculus. EPA NPDES permit conditions and state environmental regulations have increasingly codified it. Backup power at lift stations is not a capital improvement budget line item to defer. It is regulatory infrastructure.

We finance backup generators for water and wastewater treatment plants, sewage lift stations and pump stations, water distribution booster pump stations, raw water intake facilities, and water reclamation and recycled water plants. The deal sizes in this sector range from $50k for a single lift station standby generator set up through large treatment plant backup power installations that include multiple paralleled generator sets, automatic transfer switching infrastructure, and sub-base fuel systems for extended runtime.

Many of our municipal water and wastewater clients are local government entities operating under capital budget constraints that make equipment lease financing more practical than cash purchase. Others are private water companies, municipal utility districts (MUDs), and water supply corporations. We work with every entity structure in this sector.

Why the Regulatory Environment is Driving Generator Investment

EPA's Clean Water Act enforcement has intensified pressure on municipal wastewater utilities to demonstrate adequate backup power capability at lift stations and treatment plants. State EPA programs have followed with their own requirements, and many state NPDES permits now include specific backup power provisions. A utility that has experienced an SSO and is under a consent order with the state environmental agency will typically have a capital improvement plan that includes backup generator installation across its lift station inventory, on a specific timeline negotiated with the agency.

Drinking water systems face a parallel regulatory pressure through AWIA 2018 (America's Water Infrastructure Act), which required utilities serving more than 3,300 customers to complete risk and resilience assessments by specific deadlines. Those assessments almost universally identified power outage as a key vulnerability, and the emergency response plans that followed from those assessments include backup generation as a required mitigation measure. Utilities that have completed their AWIA assessments and plans but have not yet implemented the backup power recommendations are in a position where the regulatory clock is running.

Storm resilience has accelerated the backup generator investment cycle in coastal and Gulf Coast water utilities specifically. The performance of water and wastewater systems during Hurricanes Harvey, Ida, and Ian demonstrated that utilities without robust backup generation were unable to maintain service during multi-day grid outages, creating public health emergencies on top of storm damage. Houston area utilities, in particular, underwent significant capital program adjustments after Harvey demonstrated the vulnerability of the regional water infrastructure to extended power outages.

Eligible Equipment and Facilities

Lift station generators are the highest-volume application in the water sector. A typical municipal wastewater utility operates anywhere from a handful to hundreds of lift stations, and equipping each with an appropriately sized standby set is a significant but bounded capital program. The generator size for a lift station is determined by the pump motor horsepower, and most lift station generators fall in the 30kW to 150kW diesel range. We finance individual lift station sets and program-level packages covering multiple stations simultaneously.

Water treatment plant main facility generators are larger, often in the 500kW to multi-megawatt range for facilities serving mid-size cities. These plants run filter backwash systems, chemical dosing equipment, UV disinfection, ozone generation, and process controls that require reliable power. The transfer switching for a large water treatment plant is more complex than a single ATS panel, often involving load prioritization and staged transfer to prevent voltage sags that would affect sensitive process equipment.

Natural gas standby generators are preferred in many urban utility applications where diesel storage and spill risk create permitting complications and where pipeline gas service is reliable. For rural water systems and lift stations in areas without pipeline access, diesel remains the standard fuel. We finance both configurations and the dual-fuel variants that some utilities use for fuel flexibility.

Emergency mobile generation is part of the resilience program for many larger utilities. A fleet of trailer-mounted generator sets that can be rapidly deployed to any facility in the system that has lost permanent backup power provides a level of flexibility that a fixed-only strategy cannot match. We finance those mobile fleet assets alongside permanent installations.

How Municipal Water System Financing Works

Municipal financing has specific characteristics that differ from private sector equipment financing. Cities, counties, special districts, and municipal utility districts may be subject to public bidding requirements, council approval thresholds, and specific appropriation language that affects how the financing contract is structured. We work within those requirements and can provide documentation in formats that municipal purchasing departments and legal counsel recognize.

Many water utilities operate under rate structures and bond covenants that affect their debt capacity. Equipment financing structured as an operating lease does not count against debt limits in the same way a loan does in many jurisdictions. We can structure water utility generator financing as an operating lease where the accounting and debt treatment matter for the utility's rate structure or bond covenant compliance.

For consent-order-driven capital programs where the timeline is set by a regulatory agreement, the financing has to move on the project timeline, not on a bank's underwriting schedule. We close in one to two weeks. If a consent order requires lift station generator installation at 10 stations by a specific quarter, the financing for that program can be structured as a single master facility with draws as each station is completed, which aligns the debt service with the completion schedule rather than front-loading the full obligation.