Water is one of the most important resources in modern manufacturing and infrastructure, yet most of it is never seen by the people who benefit from the products and services it helps create.
It cools equipment, generates steam, transports materials, cleans production lines, washes food, manufactures computer chips, and helps produce everything from electricity to automobiles. In many cases, water is just as critical to an industrial process as the raw materials themselves.
Recently, datacenters have drawn significant attention because of the amount of water some facilities use for cooling. As artificial intelligence continues to expand, communities have understandably begun asking more questions about how these facilities affect local water supplies.
Those conversations have also highlighted a broader reality. Many industries rely on large volumes of water every day, often in ways that are not immediately obvious. The amount of water a facility uses depends on the process, the technology, and the scale of the operation, but one thing is consistent across nearly every industry: the water almost always requires management after it has done its job.
It is also worth noting that water withdrawal, water consumption, and wastewater generation are not the same thing. Some facilities withdraw large volumes of water and return most of it after cooling. Others consume water through evaporation. Still others generate wastewater that must be treated before it can be reused or safely returned to the environment.
Understanding those differences provides a much more complete picture of how industry uses one of our most valuable natural resources.
Power plants are among the largest users of water in the United States.
A large thermoelectric generating station may withdraw 50 to more than 500 million gallons of water per day, depending on its size and cooling system. Much of that water is used for cooling and is returned to its original source, although a portion is lost through evaporation.
In addition to cooling water, a typical plant may generate hundreds of thousands to several million gallons of wastewater during normal operations and maintenance.
That wastewater can come from:
Many facilities treat these wastewater streams onsite before discharge, while others send certain wastewaters to specialized treatment providers.
Modern computer chips require incredibly clean manufacturing environments, and that includes water.
A large semiconductor fabrication facility may use 2 to 10 million gallons of ultrapure water every day to repeatedly rinse silicon wafers during production.
The good news is that semiconductor manufacturers have become leaders in water recycling. Many facilities now recover 60 to more than 90 percent of their process water for reuse.
The remaining wastewater typically contains process chemicals, acids, metals, and microscopic contaminants that must be removed before reuse or discharge.
Paper production has long been one of the world's most water-intensive manufacturing processes.
A large paper mill may use 10 to 50 million gallons of water each day, depending on the products being manufactured and the amount of recycled fiber being used.
Water carries pulp through the production process, separates fibers, washes finished paper, and cools equipment.
Modern mills often recycle substantial amounts of process water internally, but wastewater containing fibers, suspended solids, starches, and treatment chemicals still requires treatment before being released.
Water is used throughout nearly every stage of food production.
A large food processing facility may use anywhere from 500,000 to more than 5 million gallons of water per day for washing ingredients, cleaning equipment, steam generation, cooling, and sanitation.
Depending on what is being produced, wastewater may contain:
Many facilities recover portions of their water for reuse, while the remainder is treated before discharge or sent to specialized wastewater treatment facilities.
Turning crude oil into fuels and other products requires significant amounts of water.
A large refinery may use 1 to 5 million gallons of water each day, with some of the largest facilities using considerably more.
Water supports:
Wastewater generated during refining often contains oils, hydrocarbons, suspended solids, and dissolved contaminants that require multiple stages of treatment.
Many refineries also recycle portions of their water to reduce freshwater demand.
Chemical manufacturing covers thousands of different products, so water use varies widely from one facility to another.
A medium-to-large chemical plant may use 500,000 to several million gallons of water each day.
Water may be used as:
Many facilities operate sophisticated onsite treatment systems that allow portions of the water to be reused while preparing the remainder for compliant discharge.
Mining operations move enormous quantities of material, and water is an important part of that process.
Large mining operations commonly use millions of gallons of water every day for ore processing, dust suppression, slurry transport, and equipment cleaning.
Many mines recycle process water multiple times before it leaves the site.
Any excess water may require treatment to remove suspended solids, dissolved minerals, or metals before it can be released.
Building a vehicle uses far more water than many people realize.
A modern automotive assembly plant may use 500,000 to 2 million gallons of water each day.
Water supports:
Paint booths and pretreatment systems generate wastewater that often contains coatings, oils, detergents, and suspended solids.
Many automotive manufacturers recover and recycle rinse water before treating the remaining wastewater.
Datacenters have become one of the most talked-about examples of industrial water use because of the rapid growth of artificial intelligence.
A large hyperscale datacenter may consume 1 to 5 million gallons of water each day, primarily for evaporative cooling systems.
Unlike manufacturing facilities, datacenters generally do not produce wastewater from production processes. Instead, most wastewater comes from:
Many newer facilities are reducing potable water demand by using reclaimed water, recycled industrial water, and closed-loop cooling technologies wherever practical.
As cooling technologies continue to evolve, reducing freshwater consumption has become an important design consideration for many new facilities.
Looking only at how much water an industry uses rarely tells the full story.
Some facilities withdraw enormous amounts of water but return most of it after cooling. Others consume relatively little water but generate complex wastewater that requires extensive treatment. Many industries now recycle significant portions of their process water before additional treatment or discharge.
Across nearly every industrial sector, the goal is becoming the same: use water as efficiently as possible, recover what can be recovered, and ensure the remaining wastewater is managed responsibly.
At Valicor, we work with many of these industries to help manage wastewater generated during manufacturing, maintenance, outages, cleaning, and infrastructure projects. While every facility is different, responsible wastewater treatment plays an important role in protecting local water resources while allowing critical industries to continue operating.
As conversations around industrial water use continue to grow, understanding what happens after the water leaves the process is just as important as understanding how much water was used in the first place.