Why water matters operationally

How has water availability changed over the past five to ten years?
The most important change is reduced predictability. Many sites are seeing greater variability in water availability, source-water quality and operating restrictions. Historical averages are therefore becoming less reliable as a basis for operational and investment decisions.

In your role, have you observed increasing pressure from drought, low river levels, extreme weather or competing water demand?
Yes. The pressure is no longer limited to traditionally water-scarce regions in the south of Europe. The periods without rainfall are longer and more equally distributed across Europe, whereas in the past, in dry periods, water was still available in rivers and lakes from other regions. Drought, low river levels, heat, flooding and competing demand, for instance when the limited water availability needs to be shared between agriculture and industry, can each impact water quantity, quality or discharge conditions. For an industrial site, these external events quickly become operational issues.

Which water-related risks are most concerning site leadership today?
Business and production continuity is usually the central concern because it connects the other risks. A shortage of intake water, reduced cooling performance, limited wastewater-treatment capacity, a tighter discharge permit or rising cost can each restrict production output. Leadership increasingly needs one integrated view of these risks rather than treating them separately.

Where water risk becomes a technical constraint

What technical limitations commonly exist before improvement efforts begin?
The limitations are often distributed across the site. Restricted cooling-water availability requires tighter control of the water chemistry; as the evaporation remains unchanged, the salts in the cooling circuit become more concentrated when flows are pinched, leading to higher risk of scaling and corrosion, and potentially higher energy consumption resulting from fouled heat exchangers. Boiler feedwater quality is critical for its safe and energy efficient operation, more effort may be required to ensure stable boiler feedwater quality through improved pretreatment. Insufficient wastewater-treatment capacity may cause occasionally spilling contaminants in the environment, what may breach permit constraints and thermal-discharge limits. The system may still operate, but with less margin, more manual intervention and greater vulnerability during abnormal conditions.

What happens operationally during periods of reduced water availability?
Sites are responding differently, also related to the severity and duration of reduced water availability and measures implemented by the local authorities. Initially, operations may continue with more attention to optimizing water flows and increased monitoring of critical users. At prolonged periods of reduced water availability, especially when combined with hot external temperatures and thus high water evaporation, change of production schedules or lower throughput may be implemented to reduce the need for cooling and heating. 
At the same time, lower river flow or higher temperatures can tighten discharge conditions, as there is less water volume to dilute the temperature or discharge constituents. Lower river water flow often is related to poorer quality intake water, leading to additional pretreatment steps for using fresh water with associated additional water losses. This creates a double constraint: less water of poorer quality may be available for production while the acceptable discharge window also becomes smaller.

Why are cooling and steam systems particularly important?
They are directly linked to reliable production. Poor water control can increase scaling, corrosion, fouling and microbiological risk. This in turn may lead to reduced heat transfer and inefficient cooling of production fluids, what may impact product quality, reaction efficiency, production safety, higher energy demand, more maintenance and greater downtime risk.

Why can wastewater capacity become a production bottleneck?
Wastewater treatment is often viewed as the final step, but its capacity and stability can determine how much the site can produce. Wastewater treatment systems are normally designed for average production and handling temporary peak situations. If the hydraulic load exceeds the design parameters, or the water quality is worse than can be handled, the whole wastewater treatment system may become inefficient in handling the variable flows and contaminant peaks caused by e.g. cleaning batch reactors. Therefore, insufficient treatment margin can limit discharge within the permit conditions, and as such constrain production volumes and make water reuse less reliable.

How performance is managed and reported

Which KPIs are generally tracked?

Across Europe, refineries, petrochemical plants and chemical manufacturing sites are required under Industrial Emissions Directive (IED) permits to routinely monitor and report water intake volumes, wastewater discharge volumes, and various water parameters in their effluent. While reporting authorities differ by country and within countries even by smaller geographic areas, the monitored parameters are largely harmonized through Best Available Technology (BAT) Conclusions and national permit requirements. Key operational parameters such as flow and pH are typically monitored continuously, whereas laboratory analyses for COD, nutrients, hydrocarbons and metals are generally reported monthly or quarterly, with annual environmental compliance reporting required across most jurisdictions. 

Regulatory expectations are also expanding beyond discharge compliance to include water withdrawal, consumption, recycling and reuse rates, reflecting the increased emphasis on water efficiency, circularity and resource management under the revised IED and Industrial Emissions Portal Regulation.

Many industrial companies are relating freshwater withdrawal and water consumption to their production volume. Typical KPIs include water intensity per unit of production, such as m3 per barrel of oil produced. Within plants, companies typically determine the efficiency of cooling cycles and performance, boiler and condensate recovery, wastewater flow and quality, permit compliance, reuse volume, chemical and energy use, and equipment reliability. The precise set should reflect the site's operational risks and business objectives.

How are water-related decisions made?

A few companies act solely on the sustainability targets they have communicated to their shareholders and stakeholders. The majority of (petro)chemical companies and refineries, however, approve water investments when there is a clear return on investment and reasonable payback time, or when water becomes a measurable business constraint on production, permits, expansion, or cost, not simply because a project improves sustainability.

Recent examples from (petro)chemical companies and refineries investing  in water have a specific operational or financial trigger, such as:

• a forecasted strong increase in the cost of purchased water;
• insufficient water availability for production growth;
• reduced permission for water intake 
• discharge permit constraint;
• limited cooling, steam, or wastewater-treatment capacity;
• a refinery conversion, hydrogen, SAF, biofuel, or other major capital project;
• deterioration in feedwater or wastewater quality.

How is water performance reported internally?

Mature organisations combine operational dashboards with management reporting. Operators need timely information and alarms. Site leadership needs trends, exceptions, risks and actions. Corporate teams need a consistent view of progress against water, resilience and sustainability commitments.

Is water a sustainability initiative, an operational initiative, or both?

We see a shift over the past few years. Until about a decade ago, water was mainly seen as an abundant utility required for production. Water investments were mainly related to improving operational performance. 

Increasing awareness about sustainable water use, fossil-based carbon reduction and climate change has led to increased efforts to improve water efficiency, also because this has beneficial effects on Total Cost of operation. The water-energy nexus plays a strong role here, e.g.  water needs energy for pumping, quality improvement, heating and cooling, therefore lower volumes of water pumped or treated equals less energy and thus reduces operational cost.

In the very recent years, water is increasingly seen by industries as a strategic resource. Absence of water can jeopardize business continuity; poor water quality can affect production performance and cost. Sustainable water use is beneficial for the environment, but operational relevance is what makes progress durable. Water reduction and reuse support sustainability goals, while reliable cooling, steam, process water and wastewater treatment protect production, quality, compliance and cost. The business case is strongest when both dimensions are addressed.

Preparing for a less predictable water future

Does the site formally assess water-related risks?

Most companies have a good perspective on water-related operational risk. However, water-related risks present themselves not only internally in operating a chemical plant or refinery, risks may also arise from other companies operating in the same water catchment or river area, or from external climate factors such as excessive rainfall or drought. Leading sites assess both catchment risk and operational risk. The catchment view shows external pressure, while the site water balance identifies critical users, losses, constraints and potential alternative sources or reuse opportunities.

Are drought scenarios included in business continuity planning?

They should be. A useful drought plan defines trigger points, decision rights and practical responses for different levels of restriction. It should distinguish actions that can be taken immediately from measures that require engineering or capital investment significantly in advance. We do note, however, that still many companies have been caught by surprise with the impact of long droughts and low water volumes in local rivers and lakes during the last summer. 

Has climate resilience become part of investment planning?

Increasingly, yes. We see an increasing number of companies reaching out to evaluate best scenarios for investment for making their water cycle more resilient  against future reduced water availability, source-water variability, discharge limits and extreme weather. This changes the business case from simple payback to avoided risk, protected production and retained capacity for growth.

What assumptions are being made about future water availability?

The safest assumption is that availability and quality will be more variable, and that permits will become more restricted, while the European regulations driving the permit constraints will become more stringent. Planning should therefore use scenarios rather than one historic average and should identify where the site has limited operating margin.

Have companies changed their approach based on recent drought events in Europe?

The  European (petro)chemical and refinery industry is facing significant competition in the global market. While it is generally recognized that water investments are required to ensure business continuity, at the same time the Total Cost of Operation must be considered, to stay competitive in the global market. Therefore, the direction is shifting from reactive response to structured resilience planning. Companies are paying more attention to water balances, reuse options, drought playbooks and investment roadmaps. The challenge is to convert awareness into funded and executable projects, and sustainable financing.

How are future water shortages incorporated into operational planning?

Start by identifying critical water users and the minimum water quantity and quality required to maintain safe production. Then define trigger levels, operating responses, alternative sources, storage or reuse options, and the investments needed before a restriction occurs.

What practical improvement can look like

Have cooling systems been modified or optimised?

In the (petro)chemical and refinery industry, process cooling is one of the most significant water uses for a company. Cooling optimization is often one of the highest-value starting points. Improved automation to obtain better control of chemistry, cycles, heat transfer, blowdown, fouling and microbiological risk can reduce freshwater demand while protecting asset reliability and energy performance.

Have water reuse or recycling initiatives been introduced?

Yes, we have several examples of companies who safely and reliably recycle their effluent and reuse the water. However, the sequence of steps to be taken matters to avoid oversized, costly and difficult-to-operate end-of-pipe recycling solutions. First reduce avoidable demand and stabilize the processes creating wastewater, segregate streams where possible. Ensure that the wastewater treatment plant is producing stable and reliable effluent quality, through improved digital and operational procedures. Then match water quality to the intended reuse. 
As every production location has different layouts, process equipment and general operating procedures, it is recommended to conduct on-site pilot to understand the water quantity and quality dynamics 24/7 before designing the final solution. 

While the design of the recycling system is important, good operation of the wastewater treatment plant and recycling plant is even more critical.  A small upset in the effluent quality can jeopardize the capital investment and operational cost of the water recycling system.  

Has site monitoring become more sophisticated?

It needs to. Flow, quality and asset-performance data provide earlier warning of losses, contamination or deteriorating treatment performance. Digital monitoring is most valuable when it supports clear operational decisions rather than simply creating more data. It is critically important to implement sophisticated monitoring when operating recycling systems, as performance and financial KPIs strongly depend on timely and adequate cleaning of the filtration assets.

Have treatment technologies enabled greater water reuse?

In particular the advancements in membrane filtration technology have accelerated water reuse. However, there is no magic bullet that provides a plug & play reuse solution that works under all circumstances. Technology selection must follow a sound water balance, stream characterization and understanding of production dynamics and water variability, treatability work and a clear reuse-quality requirement.

What changes have delivered the greatest operational benefits?

The greatest benefits usually come from combining operational discipline, chemistry, right water technology, monitoring and targeted engineering. A single technology rarely solves a site-wide water problem. The better result comes from improving the complete water cycle and linking each action to safety, reliability, compliance, cost and water reduction.

Practical advice for industrial leaders

What advice would you give to industrial operators facing growing water constraints?

Do not wait for a drought restriction or permit issue. Establish the water balance, identify critical systems and quantify the operational consequence of failure, followed by optimization of the steam and cooling cycles, both in terms of water usage and performance. Then build a phased roadmap that starts with no- and low-capital improvements and prepares the larger investments early.

What are the biggest misconceptions about water management?

One misconception is that water is inexpensive and therefore difficult to justify financially. The true cost of water goes beyond the price paid for incoming water and includes treatment, energy for pumping, heating, cooling, discharge and sludge disposal, maintenance and production risk.

A second misconception is that installing a recycling plant automatically creates resilience. Without upstream control and operating capability, it may simply move the problem or create new ones.

Where should companies begin if they want to improve water resilience?

Begin with facts: a catchment-risk screen, a reconciled site water balance and a review of critical assets, permits, and foresight in changing regulations and applicable BAT reference documents. This creates a common baseline and shows where reductions, direct reuse, treatment upgrades or alternative sources will have the greatest value. Relate the risks with financial operating impact and create an investment roadmap.

Which investments create the greatest impact?

The best investments are site-specific, but metering and monitoring, cooling and boiler optimization, condensate recovery, stream segregation and targeted reuse often create strong value. Larger treatment investments should follow only when the source, destination, quality requirement and operating model are clear.

What should industrial leaders be doing now to prepare for future water stress?

Treat water as a strategic operating risk. Assign ownership, include drought and discharge scenarios in business-continuity planning, protect critical cooling and steam systems, develop a prioritized investment roadmap and track outcomes through operational KPIs. The goal is to move from reacting to restrictions to managing resilience proactively.