Greywater-to-Datacenter Water Supply Infrastructure
C5/10May 1, 2026
WhatA service that sources, treats, and delivers municipal greywater (non-potable wastewater) to data centers for cooling, letting them run open-loop systems without consuming freshwater.
SignalCommenters note that open-loop cooling works fine if data centers use greywater instead of potable water — the water evaporates, returns as rain, and no one loses drinking water — but no one is actually building the infrastructure to make this easy for operators.
Why NowMunicipalities are simultaneously dealing with wastewater treatment costs and fighting data center water permits — connecting these two problems is newly viable as data center builds cluster in specific regions and greywater treatment technology has matured.
MarketData center operators in water-stressed regions; municipal water utilities looking for greywater offtake. Initial TAM is niche (~$500M) but grows with every new data center. No direct competitor focuses on this specific wedge.
MoatLong-term municipal water contracts and pipeline infrastructure create high switching costs — once you're the greywater supplier for a data center campus, competitors can't easily displace you.
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