Municipal Water Management: Strategies for Improving Water Supply and Treatment

A coordinated plan produces more reliable and efficient systems

Growing populations, aging infrastructure, and drought are putting pressure on municipal water systems. To respond, municipalities need to identify gaps in supply, treatment, and reliability, then evaluate improvements that fit their needs and resources.

Measure Supply, Demand, and System Performance

A good starting point for municipal water management is to understand how current water supply and treatment capacity compare with demand. Municipalities should assess reliable source yield, seasonal and peak demand, storage, and distribution volumes.

These figures can be compared with projected population and commercial growth, potential drought conditions, and changes in source water quality. A treatment plant that can meet average demand still might lack sufficient capacity during seasonal peaks or emergencies.

When treatment capacity cannot meet current or projected demand, plant expansion is an option. In Sint Maarten, for example, Seven Seas Water Group doubled the desalination capacity of the Pointe Blanche facility from 1 to 2 million gallons per day (MGD) to address a drinking water shortfall. In Magnolia, Texas, Seven Seas expanded a conventional activated sludge wastewater treatment plant by 750,000 gallons per day, bringing treatment capacity to approximately 1.3 MGD without interrupting operations.

Reduce Nonrevenue Water and Distribution Losses

Evaluating distribution is another important part of municipal water management. Nonrevenue water includes physical leaks, apparent losses such as inaccurate metering, and authorized but unbilled water use.

Water audits can identify where losses are occurring and which improvements to prioritize. District metering and leak detection can assist in locating physical losses, and pressure management and targeted water main repairs can help reduce them. Improving meter accuracy helps utilities measure customer consumption more accurately.

Manage Assets by Risk, Not Just Age

An updated asset inventory and maintenance history can help municipalities prioritize infrastructure improvements based on condition and risk, rather than age alone. For example, a newer water main showing signs of premature deterioration might require replacement sooner than an older main that performs reliably.

Lifecycle planning also helps municipalities make more informed budget decisions. Repairs, rehabilitation, process upgrades, and full replacement can be evaluated against expected service levels, operating costs, and long-term infrastructure needs. EPA guidance recommends evaluating asset criticality, long-term funding, and lifecycle costs when planning investments.

Match Treatment and Supply Options to the Gap

A shortfall in hydraulic capacity is different from a shortfall in treatment performance, and they require different solutions. Some plants can add a treatment stage, replace aging equipment, or expand capacity without replacing the entire facility. Others might need a different treatment process to address contaminants or meet stricter discharge limits.

Where centralized expansion would require substantial new conveyance infrastructure, decentralized treatment is worth evaluating. Locating treatment capacity closer to demand can reduce the need for long conveyance pipelines and may lower construction and pumping costs, depending on site conditions.

For wastewater treatment plants that must meet stricter effluent standards or increase capacity, membrane bioreactor (MBR) technology might offer advantages over conventional activated sludge systems. MBR systems can achieve high-quality effluent within a smaller footprint, potentially allowing an upgrade of existing facilities without extensive new construction. Phased expansion can align treatment capacity with demand, reducing the need to finance infrastructure before it is required.

Diversify Water Sources and Improve Resilience

Conserving and managing demand can reduce pressure on water supplies, but growing communities might also need to evaluate alternative sources. One option is using appropriately treated reclaimed water for irrigation, industrial processes, and other nonpotable applications that would otherwise use drinking water.

Brackish groundwater desalination is an option where a suitable aquifer is available. In Alice, Texas, Seven Seas helped develop local brackish groundwater as a drinking water source. Through a privately financed project, the city expanded its water supply options without directly funding the plant’s upfront capital investment. The project agreement also established long-term water pricing.

Beyond diversifying water sources, municipalities should evaluate water system resilience and how their system would respond to disruptions such as major equipment failure, losing a water source, or power outages. Redundant equipment, alternative supplies, storage, and emergency operating procedures can maintain service reliability during these events. Routine pump optimization, preventive maintenance, and monitoring also reduce energy consumption and operating costs.

Choose Financing and Delivery That Fit the Project

Municipal improvements can be funded through capital budgets, municipal bonds, rate increases, grants, and state revolving fund loans. Each option has different costs, eligibility requirements, and timelines.

Municipalities can also compare public financing with alternative delivery models. Seven Seas’ Water-as-a-Service® (WaaS®) model can combine infrastructure development, private financing, ownership, operations, and maintenance under a long-term agreement. Municipalities should compare each option based on lifecycle cost, performance requirements, risk allocation, and the oversight the municipality will retain.

Turn Priorities into a Phased Action Plan

To put the findings into action, municipalities can:

• Set measurable targets for service reliability, capacity, and water loss.
• Identify the highest-risk assets and the improvements needed to meet projected demand.
• Assign each project a timeframe based on urgency, funding, and expected effect on the system.

Review the plan as population, regulations, operating conditions, and water supply needs change.

Seven Seas Water Group works with municipalities to evaluate treatment capacity, alternative water supplies, phased expansion, decentralized infrastructure, and long-term delivery options. To explore how a new or upgraded treatment system could support your community’s water management goals, contact our team to schedule a consultation.

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