The Real Cost of Industrial Water | Excel Water

Water is Becoming a Strategic Business Issue

The current pressure around the UK water sector is hard to ignore. Thames Water’s financial difficulties have kept water infrastructure, investment and public trust firmly in the news. At the same time, dry-weather planning continues to receive national attention — the Environment Agency has confirmed that the National Drought Group is actively assessing drought planning, demand reduction and supply resilience.

For industrial sites, this does not mean there is an immediate crisis at every location. But it does mean water resilience deserves proper attention.

If a manufacturing process relies on water for cleaning, rinsing, cooling, steam raising, product quality, chemical dilution, laboratory use, demineralised water, wastewater handling or general process stability, then water is not just a background service. It is part of production continuity.

The Water Bill Is Only the Starting Point

The visible water bill is often only one part of the cost. A full review should consider all of the following — many of which can be split across different budgets, making them easy to underestimate when viewed in isolation.

Facilities may see the water bill. Engineering may see the maintenance issues. Production may see the downtime. Finance may see the consumables. Environmental teams may see the discharge targets. But the site pays for all of it.

Wastewater and Discharge Can Change the Calculation

For some sites, the cost of water is not only about what comes in. It is also about what goes out. Wastewater volume, trade effluent strength, discharge limits and treatment requirements can all have a major impact on operating cost. A site may focus heavily on reducing incoming water use, while overlooking the cost of sending treated water, process water or contaminated water to drain.

This is particularly important for businesses using reverse osmosis, nanofiltration, demineralisation, softening or other treatment processes. RO reject, softener regeneration, filter backwash, cleaning cycles and rinse water can all contribute to wastewater volume.

Energy Cost Is Part of Water Treatment Cost

Industrial water treatment does not operate in isolation from energy. Pumps, pressure vessels, reverse osmosis systems, nanofiltration systems, recirculation loops, UV units, dosing systems and control panels all require power. In membrane treatment, energy can become a particularly important part of the operating model.

A well-designed and well-maintained system can reduce waste, improve reliability, protect equipment, reduce consumables and support production quality. But energy should be included in any design and commercial review. Useful questions include:

Water treatment is not just a water decision. It is also an energy, maintenance, production and resilience decision.

IBC Demin Water: Convenient, But Not Always Economical

Many businesses buy demineralised or deionised water in IBCs because it is simple. There is no plant to install, no resin or membranes to manage, no pretreatment to consider and no service schedule to maintain. For low-volume, irregular or temporary use, that can be the right decision.

But once IBC water becomes part of normal production, the true cost deserves a closer look. A 1,000-litre IBC is only one cubic metre of water — and once delivery, handling, storage, emergency orders, empty-container logistics and quality checks are included, the delivered cost per usable litre can rise quickly.

Buying IBC demin water is not wrong. But regular IBC use should always trigger a proper make-versus-buy review.

Maintenance Is Part of Water Efficiency

When cost pressure rises, maintenance is often one of the first areas businesses look to delay. With water treatment, that can be a false saving. A poorly maintained system may still appear to be working while quietly increasing operating costs.

A service visit, media change, membrane clean, resin replacement, instrument check or minor remedial upgrade may deliver better value than allowing a system to deteriorate until production is affected. See also our guides to water softener troubleshooting and RO system performance.

Water efficiency is not always a new capital project. Sometimes it starts with making the existing system perform properly.

Water Efficiency Incentives Are Starting to Appear

The direction of travel is also changing at a regulatory level. Ofwat has highlighted charging trials — including an Anglian Water trial from April 2026 for some non-household customers — designed to encourage investment in on-site water efficiency measures. Business water charges are also changing through the PR24 period, with 2026/27 charges now feeding through from wholesalers and retailers.

For high-use sites, this makes water data more valuable. Businesses that understand their water use, treatment performance, wastewater profile, peak demand, storage capacity and process dependency will be better placed to respond to future changes in cost, availability and regulation.

What Manufacturers Should Review

A practical industrial water review should include more than the monthly bill. The following ten questions provide a useful starting framework for any site that wants to understand what water is really costing the business.

The Commercial Opportunity

The real cost of industrial water is bigger than the water bill because water touches so many parts of a manufacturing site. It affects production, quality, cleaning, compliance, maintenance, energy use, wastewater, resilience and operating cost.

For some businesses, the opportunity may be a full water reuse or recovery project. For others, it may be a service review, softener optimisation, RO performance check, resin change, storage review, borehole assessment, IBC make-versus-buy calculation or better monitoring.

The right answer depends on the site. But the starting point is the same: understand what water is really costing the business.