Data Centre Water Treatment & Cooling

It varies enormously with size, climate and cooling design. A large data centre can use up to 5 million US gallons (around 19 million litres) a day — comparable to a town of 10,000–50,000 people — while Google reports its average data centre uses about 550,000 gallons (roughly 2 million litres) daily. Air-cooled sites use far less on site but pay for it in energy. A useful yardstick is Water Usage Effectiveness (WUE): the industry average is around 1.8 litres per kWh of IT energy, with best-in-class sites below 0.2. On evaporatively cooled sites, the biggest controllable share of that water is blowdown — which is exactly the water HydroFLOW® helps a site stop wasting.

The honest answer is that the numbers depend heavily on methodology. Per-prompt estimates range from about a third of a millilitre (OpenAI's figure) to roughly half a litre once the water used in electricity generation is included. Two distinctions matter: withdrawal vs consumption (most withdrawn water is returned to source; evaporated water is not), and direct vs indirect use (on-site cooling vs power-station cooling). What is not in dispute is the direction: AI compute is growing quickly, most new capacity relies partly on evaporative or adiabatic cooling, and much of it is being built in water-stressed regions — 84% of proposed UK data centres are planned for areas of current or projected water stress. That makes reducing on-site consumptive use — chiefly blowdown — a priority operators can act on today, which is where HydroFLOW® fits.

HydroFLOW® keeps dissolved minerals in suspension instead of letting them deposit as scale on cooling-tower fill, condensers and heat exchangers. Because scale is no longer the limit on how concentrated the cooling water can get, many sites raise cycles of concentration and reduce blowdown — the single biggest lever on cooling-water consumption. At an Amsterdam data centre, chemical-free cooling with HydroFLOW® delivered around 75% water saving. It works from one fitting on the outside of the pipe, with no chemicals added to the loop.

Yes. Adiabatic and evaporative cooling concentrate minerals as water evaporates, so scale and biofouling form quickly on pads, nozzles, fill and heat-transfer surfaces. HydroFLOW® conditions the water physically so those minerals stay in suspension, keeping surfaces cleaner, protecting spray and airflow, and supporting higher cycles of concentration with less blowdown. It suits adiabatic cooling, cooling towers and condenser water in a data centre, and installs without cutting into the pipework.

Yes. Scale on condensers, chillers and heat exchangers directly raises the energy needed to reject heat — even 1 mm of scale can cut heat-transfer efficiency by around 7% — and fouled cooling water is a maintenance and reliability risk in a facility where uptime is everything. By keeping heat-transfer surfaces clean and helping suppress biofilm, HydroFLOW® protects cooling efficiency (PUE and WUE) and reduces the descaling and cleaning interventions that put pressure on a live data centre.

HydroFLOW® targets the scaling function of a chemical programme — the antiscalant and softener load — and reduces or removes it, while also helping suppress biofilm on cooling surfaces. This supports a leaner data center cooling water treatment regime and less chemical handling on site. Corrosion inhibition, pH control and any Legionella duties on open cooling systems are separate and should be maintained as your standards require; HydroFLOW® works alongside them.

Yes. HydroFLOW® installs on the outside of steel, copper or plastic pipework on cooling towers, condenser water, chilled water and adiabatic systems. Because it installs without cutting into the line, it can be fitted while the facility stays live, with no interruption to cooling — important where uptime cannot be compromised. One correctly sized unit conditions the connected loop from a single point and runs continuously, 24/7.