The Ultrapure Water — 10 Million Gallons a Day Per Fab
Every modern fab uses ~10 million gallons of ultrapure water per day. Water so pure that one impurity per trillion ruins a wafer.
An ultrapure water (UPW) system is a multi-stage water plant integrated directly into a chip fab. It takes municipal water and removes ions, organics, particles, and dissolved gases down to parts-per-trillion levels — water so clean it would actually dehydrate you if you drank it. Kurita Water Industries in Japan designs, builds, and operates UPW systems for most of the leading-edge fabs in Asia, on 10+ year fixed-fee plus volume-tariff contracts. After the Avista (US) and Arcade (Dresden, 2023) acquisitions, Kurita is ~50/50 Japan/overseas. Competitor list is short: Kurita, Veolia, Organo, and Pentair's X-Flow ultrafiltration.
Once you're the UPW vendor in a fab, you're there for 15–20 years. Every reshored fab is a multi-decade customer.
2 names on the watchlist
Japan's dominant semiconductor UPW supplier. Multi-decade contracts at TSMC, Samsung, Rapidus.
Japanese specialist in ultrapure water systems for semiconductor fabs . Designed-in supplier to TSMC Arizona, Samsung Taylor TX, Rapidus Hokkaido, Intel Ohio. Recurring multi-decade revenue. ~50/50 Japan/overseas mix.
Owns X-Flow ultrafiltration (UPW pretreatment standard) + pool/residential.
Owns X-Flow, the industry-standard ultrafiltration system for UPW pretreatment. Less pure-play than Kurita but US-listed and more accessible. Pool/residential dilutes the semi exposure. The US-friendly way to play UPW.
- EPA, WEF, Pew Charitable Trusts · 2024–2026