5 Wastewater Questions for Industrial Site Selection

Wastewater capacity is often treated like a simple equation: if a community has 1 million gallons per day available and the project needs 500,000, the site works. In practice, the analysis is rarely that simple.

For major food and beverage operations, chemical manufacturers, metals processors, and other wastewater-intensive industrial users, treatment capacity is only one part of the equation. A site can appear viable on paper while still carrying significant infrastructure, permitting, cost, or schedule risk.

During an industrial site search, there are five questions we ask to determine whether wastewater service is truly capable of supporting a project.

1. Is sufficient treatment capacity actually available for the project?

The first question is the obvious one, but it requires more diligence than comparing project demand against the nameplate capacity of a wastewater treatment plant.

We want to understand the plant’s permitted treatment capacity, current average and peak flows, committed but unused capacity, and anticipated future demand. A system with substantial theoretical capacity may have considerably less capacity available once planned residential, commercial, and industrial growth is considered.

For projects that will ramp production over several years, we also evaluate whether sufficient capacity will remain available at full build-out, not simply when operations begin.

The objective is to determine how much capacity can realistically be committed to the project and whether that commitment aligns with the company’s long-term operating requirements.

2. Can the collection system actually move that volume from the site to the treatment plant?

Treatment capacity means little if the infrastructure between the site and the plant cannot convey the project's wastewater.

This requires evaluating the sewer infrastructure serving the site, including line size, available conveyance capacity, distance from the property, and whether wastewater can flow by gravity.

Where lift stations or force mains are involved, additional capacity constraints may exist. An existing lift station may need upgrades, or the project may require construction of an entirely new station.

These conditions can introduce additional capital costs, easement requirements, engineering, permitting, and construction time.

For that reason, we do not simply ask whether sewer is “available” at a site. We want to understand the complete infrastructure path from the property to the treatment facility and identify every potential bottleneck along the way.

3. Are there system conditions that make the available capacity less reliable than it appears?

Historical system performance can reveal risks that are not apparent from a capacity spreadsheet.

One major consideration is inflow and infiltration, commonly referred to as I&I. Groundwater and stormwater entering sanitary sewer systems through aging pipes, manholes, or improper connections can significantly increase wastewater flows during wet-weather events.

A treatment plant or collection system that performs comfortably during normal conditions may experience much higher flows following heavy rainfall.

We therefore want to understand whether the community has experienced recurring I&I issues, sanitary sewer overflows, capacity restrictions, consent orders, or planned rehabilitation projects.

We also examine how the wastewater system is structured. In some locations, a community does not operate its own treatment plant and instead purchases capacity from a regional provider or neighboring jurisdiction. That arrangement can create additional contractual, financial, and approval considerations that need to be understood before the site is considered fully viable.

4. Can the system accept the project's actual wastewater characteristics?

Not every gallon of industrial wastewater has the same impact on a treatment system.

Food processing facilities may generate wastewater with high biological oxygen demand, suspended solids, fats, oils, or nutrients. Chemical and metal operations may introduce completely different concerns, including pH, temperature, dissolved solids, metals, or other regulated constituents.

The project's wastewater profile must therefore be evaluated against the treatment plant's capabilities and the community's industrial discharge standards.

If the wastewater cannot be accepted directly, the company may need to install on-site pretreatment before discharge. That can materially affect capital investment, operating expenses, site layout, permitting, and project schedule.

Understanding the wastewater profile early allows the project team to determine whether pretreatment is a manageable part of the facility design or a potential site-selection constraint.

5. What has to happen before the project can actually discharge wastewater?

The final question ties the technical analysis to project execution.

Even when sufficient treatment and conveyance capacity can ultimately be provided, we need to understand what must occur before service is available.

That may include sewer extensions, lift station upgrades, treatment plant improvements, industrial pretreatment permits, capacity reservations, intergovernmental approvals, public hearings, or governing-board action.

For each required improvement or approval, we want to know who is responsible, how much it will cost, how it will be funded, and how long it will take.

A site may be able to accommodate a project after completing a $10 million treatment plant expansion. From a site-selection perspective, however, that possibility only becomes meaningful once the funding, engineering, permitting, construction schedule, and completion date are understood.

The same principle applies to regulatory approvals. Understanding the wastewater permitting process and the decision-makers involved helps identify whether a project faces unusual political, procedural, or public-opposition risk.

Looking Beyond the Capacity Number

For wastewater-intensive industrial projects, the key question is not simply, “Does the community have enough capacity?”

The better question is: Can the infrastructure serving this site discharge this specific wastewater volume and composition at this site, at an acceptable cost, and within the project's required timeline?

Answering that question requires looking beyond the treatment plant and evaluating the entire wastewater service chain: treatment capacity, conveyance infrastructure, system reliability, effluent compatibility, permitting, improvements, cost, and schedule.

Site Selection Group helps industrial companies evaluate these issues as part of a broader site-selection and due diligence process, working with communities, utilities, engineers, and other stakeholders to qualify whether wastewater infrastructure can realistically support a project’s operational requirements and timeline.

That deeper level of diligence can identify risks early, prevent otherwise attractive sites from becoming expensive surprises, and give industrial companies greater confidence that the location they select can support both initial operations and future growth.