The burgeoning artificial intelligence sector is grappling with a significant heat problem. The sophisticated chips that power large language models and generative AI systems operate at such high temperatures that conventional air and water-based cooling methods are proving insufficient. In response, data center operators are increasingly turning to an unconventional solution: submerging servers in synthetic fluorocarbon liquids, substances known for their environmental persistence.
Immersion Cooling’s Promise
This advanced cooling technique is known as two-phase immersion cooling. Server components are immersed in a specially formulated dielectric fluid, a liquid that does not conduct electricity. As the chips generate heat, the fluid boils at a low temperature, absorbing the thermal energy. It then rises as vapor, condenses back into a liquid, and drips down to resume the cooling cycle.
Chemours, a prominent manufacturer in this field, markets its Opteon 2P50 fluid with compelling claims. The company asserts that its system can reduce cooling energy consumption by over 90% and slash water usage to virtually zero. Furthermore, data center footprints could potentially shrink by up to 60%, as the need for large cooling towers and air handling units, which occupy significant space, is eliminated.
Nvidia has reported efficiency gains of up to 300 times with advanced cooling solutions. For an industry that has faced considerable scrutiny over its water consumption, particularly in drought-stricken regions, the appeal of such technologies is undeniable.
Environmental Concerns Emerge
Per- and polyfluoroalkyl substances (PFAS), often dubbed “forever chemicals,” derive their name from the exceptionally strong carbon-fluorine bonds that resist degradation in the environment. While this chemical stability makes them ideal for cooling fluids, capable of withstanding extreme temperatures, it also raises significant concerns among environmental advocates.
Environmental assessments indicate an annual evaporative loss rate of 0.7% from these cooling systems. Communities in North Carolina and Virginia have already voiced alarm regarding potential PFAS contamination risks near existing chemical manufacturing plants and data center facilities. Earthjustice has formally challenged the Environmental Protection Agency’s expedited review process for these cooling chemicals, arguing that fast-tracking approval for persistent, potentially toxic substances violates fundamental precautionary principles.
Microsoft has publicly pledged to reduce water consumption at its data centers by 31-52%, with some facilities aiming for near-zero on-site water usage. Nvidia highlights its advancements in cooling efficiency, while Amazon is actively exploring low- or zero-water cooling alternatives.
Traditional air cooling systems are no longer adequate for the escalating power densities within server racks, which have surged from 10-15 kilowatts a few years ago to 100 kilowatts or more per rack today.
A September 2026 report from ChemSec, an organization that monitors chemical industry sustainability, revealed that nearly all major PFAS producers, including Arkema and Daikin, are planning capacity expansions directly linked to the demand from AI data centers. 3M, a historical leader in PFAS dielectric fluids, has completely exited the market, redirecting its business to companies like Chemours.
As of mid-2026, no major commercial deployments of the latest generation of PFAS cooling fluids have been officially confirmed. This apparent gap between announced capabilities and actual implementation suggests that regulatory uncertainty, community opposition, or a combination of both factors may be contributing to delays in the rollout.
The regulatory landscape presents a dual-edged risk. Should environmental challenges succeed in imposing stricter oversight on PFAS, or if a contamination incident at a data center sparks public outcry, the entire product category could face significant restrictions. This potential outcome is already prompting some operators to diversify their strategies by investing in alternative cooling approaches that entirely bypass PFAS.
