Application‑level Water Cooling Ozone Generators segmentation isolates five primary end‑uses: industrial process cooling, municipal water‑treatment facilities, aquaculture systems, food‑and‑beverage processing, and pharmaceutical manufacturing. Industrial cooling, which includes metal‑working, petrochemical, and power‑generation plants, demands large‑scale ozone dosing to suppress bio‑fouling and corrosion, driving the largest share of the market (≈40 %). Municipal water‑treatment installations employ ozone‑infused cooling loops to enhance disinfection and reduce chemical footprints, representing about 30 % of revenue. Aquaculture operations rely on ozone to maintain water quality and pathogen control, contributing roughly 15 % of sales. The food‑and‑beverage sector uses ozone‑treated cooling water to extend shelf life and meet stringent hygiene standards, accounting for 10 % of the market. Pharmaceutical manufacturers apply ozone in cooling circuits to meet aseptic requirements, a niche segment that still holds 5 % of total value. These application categories determine unit capacity, regulatory compliance, and pricing dynamics, collectively defining the market’s quantitative scope.