Datacenter Water Consumption
The freshwater draw from cooling-tower evaporation and direct-evaporative cooling at hyperscale datacenters — up to ~5 million gallons per day per facility for large GPU-heavy builds in hot climates. Active community and regulatory pushback in Bexar/Hood Counties (Texas), central Virginia, central Arizona, and parts of the Pacific Northwest.
Summary
The freshwater draw from cooling-tower evaporation and direct-evaporative cooling at hyperscale datacenters — up to ~5 million gallons per day per facility for large GPU-heavy builds in hot climates. Active community and regulatory pushback in Bexar/Hood Counties (Texas), central Virginia, central Arizona, and parts of the Pacific Northwest.
A siting constraint that compounds **Datacenter Power Shortfall** — a region with available power may still fail water-permit review. Combined with power, the two constraints define which geographies can absorb new S3 capacity at all.
- Closed-loop air cooling solves the water problem at the cost of higher capex and worse PUE — the trade-off is not free.
- Water draws are typically a public-utility-commission disclosure, not a federal one — the regulatory regime varies by state and county, which is what produces the patchwork of moratoria.
- "We just won't disclose" is no longer viable — ESG reporting standards now flag water as a top-tier sustainability disclosure for cloud infrastructure.
- Compounds Datacenter Power Shortfall as a geographic constraint on new S3 region capacity
scoped_toObject Storage, S3
Definition
The freshwater draw from cooling-tower evaporation and direct-evaporative cooling at hyperscale datacenters, currently estimated at up to 5 million gallons per day per facility for large GPU-heavy builds in hot climates. Active community and regulatory pushback has emerged in Bexar and Hood Counties (Texas), central Virginia, central Arizona, and parts of the Pacific Northwest where datacenter draws compete with municipal supply or agricultural rights. Several Texas counties debated formal moratoria in early 2026.
Connections2
Outbound2
scoped_to2Resources3
Bexar County (San Antonio) case study documenting a single hyperscale facility's 5-million-gallon-per-day draw — the canonical reference for the per-facility consumption figure.
Lincoln Institute analysis of land and water impacts of datacenter growth — connects siting friction to land-use regulation across multiple jurisdictions.
Public Citizen advocacy piece around the Texas House data-center hearings — primary evidence of the regulatory pushback shaping the moratoria pattern.