The best data center site is not the parcel nearest a substation, water main, or fiber route. It is the location where the utility can commit the required power by the required date, the water system and legal rights can support the proposed cooling design, and carriers can deliver diverse, scalable connectivity at the latency your workload needs. Compare every candidate against the same workload, capacity, schedule, and evidence requirements, and treat provider-confirmed commitments differently from estimates.
A disciplined comparison also tests permitting, hazards, expansion land, equipment lead times, community impacts, and competition for local resources. A site that looks attractive on a map can still fail when connection upgrades, water rights, fiber construction, or approvals are priced and scheduled.
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Begin with the workload, not the map
Location criteria depend on what the facility will run. Document the service before asking which site is best:
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- AI training and batch high-performance computing: these workloads can be less tied to population centers when reliable energy, telecommunications, and water connections are available.
- Mixed or changing workloads: use separate requirements for each class rather than averaging them into one vague target.
For the initial design, record present and planned IT load, rack-density range, cooling technology, occupancy schedule, reliability target, and expansion phases. Include the date each phase must be operational. The ASHRAE site-planning guidance recommends aligning location and infrastructure with workload requirements and reserving future land and utility capacity. Without this baseline, a comparison rewards sites that are cheap or nearby rather than sites that can actually serve the intended operation.
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Compare power by deliverable capacity and date
Electrical infrastructure visible at a boundary is only an opportunity. Feasibility depends on how much firm capacity the utility can deliver, when it can deliver it, and which network or generation work must happen first. ASHRAE identifies power availability and interconnection timing as primary feasibility and schedule considerations.
Questions for the electric utility
- What capacity is available to this parcel today, and what capacity is available for each planned expansion phase?
- Which substation, transmission, feeder, transformer, and switchgear assets would serve the project?
- Are those assets constrained, and what reinforcement or new construction is required?
- What interconnection studies, applications, deposits, permits, and design milestones are required?
- What is the expected service date for each phase, and which dates are firm, conditional, or dependent on new generation or grid work?
- What reliability characteristics and backup arrangements apply to the proposed connection?
- Which upgrades are charged to the project, and which are part of the utility’s broader program?
- What transformer and switchgear lead times could move the schedule?
Request written evidence rather than relying on a preliminary conversation. Record the utility’s study status, assumptions, queue position where relevant, network constraints, and the conditions that could change the delivery date. A commitment that depends on a future substation or generation project is not equivalent to capacity already available at the site.
Account for continuous operation
Data centers generally need firm, continuous supply even when regional demand is volatile. The U.S. Department of Energy notes that data-center demand varies by region, can affect regional grids, may be constrained by latency, and often requires firm power. It identifies clean generation, storage, grid expansion, efficiency, and demand flexibility as possible system approaches; those options do not prove that a particular parcel has committed service. See the DOE discussion of resources for data-center electricity demand.
Model normal load, peak load, commissioning load, and the load of future halls separately. Include cooling and auxiliary systems, not only IT nameplate power. If a proposal uses on-site generation or storage, document fuel or charging assumptions, operating duration, emissions and permitting requirements, and how the system interacts with the utility connection. Treat those systems as part of the resilience design, not as a substitute for confirming grid capacity.
Separate connection cost from tariff cost
Ask for both one-time project-attributable costs and recurring tariffs. Canada’s responsible data-center development principles state that proponents should bear costs of connecting and serving their projects, including directly attributable generation, transmission, substations, and grid upgrades. That is Canadian policy guidance, not a universal rule; other jurisdictions allocate costs differently. Apply the local utility’s tariff and interconnection rules, and obtain legal and regulatory advice before treating a cost allocation as settled.
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Compare water as a local system and a cooling input
Annual rainfall or a regional label such as water-abundant is not enough. A useful comparison examines the source, legal right to use it, treatment and delivery capacity, wastewater handling, competing demands, drought variability, and the cooling design’s demand under expected climate conditions.
Establish the water envelope
- Source and type: identify potable, reclaimed, industrial, surface, or groundwater supplies and the quality each cooling system requires.
- Available capacity: confirm the water utility’s treatment, storage, transmission, and peak-delivery capacity for the project and each expansion phase.
- Rights and permits: verify withdrawal, allocation, discharge, and wastewater rights with the relevant authorities.
- Local stress: examine drought history, seasonal restrictions, environmental-flow requirements, and competing municipal, agricultural, industrial, and ecological uses.
- Cooling demand: estimate use for normal, hot, dry, and peak operating conditions, including water treatment, blowdown, and maintenance.
- Wastewater: check sewer or treatment-plant acceptance, discharge limits, capacity, and the schedule and cost of any extension.
The Open Compute Project water, heat, and energy overview explains that water scarcity impacts can include both water used directly at the facility and water associated with electricity generation. Capture both where data is available. A site that uses little on-site water may still have a substantial indirect water footprint if its electricity supply is water-intensive.
Evaluate the energy-water trade-off
Cooling choices move impacts between electricity and water. Evaporative systems may reduce electrical demand in some conditions but consume more water; closed-loop or air-based approaches can reduce direct freshwater use while changing electrical demand, equipment size, or performance in hot weather. Do not declare one technology universally superior. Compare the proposed design against local climate, grid mix, water stress, treatment requirements, and operating hours.
Canada’s principles call for minimizing freshwater use, protecting local supplies, measuring and transparently reporting water use and environmental impacts, and considering locally appropriate high-efficiency or closed-loop approaches. Those are policy principles for Canada, not universal regulatory requirements. In any jurisdiction, obtain the applicable water permits and confirm whether the provider can deliver the design flow during drought or other restrictions.
Verify fiber routes, diversity, and workload-specific latency
Marketing maps often show a nearby carrier or route without proving that capacity, physical access, or diverse paths are available at the parcel. Ask carriers for a site-specific feasibility response.
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Evidence to request from carriers
- Physical route from the carrier network to the parcel, including the proposed entrance and any rights-of-way.
- Available capacity now and after planned upgrades, with the handoff location and service type.
- Two or more physically diverse paths, including whether they share conduit, poles, bridges, ducts, or a common building entrance.
- Points of presence, exchange connectivity, and paths to the users or facilities that matter to the workload.
- Construction scope, one-time charges, recurring charges, permits, and delivery dates.
- Upgrade triggers and the lead time for additional wavelengths, ports, or route diversity.
Reliable, high-capacity fiber is critical and may require substantial network upgrades, according to the Australian consultation paper published in September 2026. Its planning discussion distinguishes user proximity for latency-sensitive services from AI training and other compute-heavy work that can be located farther from population centers if energy, telecommunications, and water connections are reliable. Those are general planning observations; actual latency and carrier availability must be tested from the specific site.
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Define the endpoints first: end users, cloud regions, exchanges, storage sites, control systems, and disaster-recovery locations. Then obtain measurements or engineering estimates for each path at representative times. A site that is ideal for batch training may be unsuitable for interactive applications even if both have the same fiber capacity. Conversely, moving closer to users may increase power, water, hazard, or expansion constraints. Weight latency only after the workload and endpoints are explicit.
Use one evidence table for every candidate
Capture the same facts, source dates, assumptions, and uncertainty for each location. Label each item as provider-confirmed, authority-confirmed, an engineering estimate, or an unverified lead.
| Dimension | Questions and evidence to record |
|---|---|
| Power | Utility-confirmed capacity and delivery date; interconnection and upgrade dependencies; substation and transmission constraints; reliability; tariffs and project-attributable costs; generation or storage dependencies. |
| Water | Source and water type; local stress and competing uses; permitted or legal rights; delivery, treatment, and wastewater capacity; cooling demand by operating condition; direct and electricity-related water impacts where available. |
| Network | Fiber carriers and physical routes; diverse paths; capacity and workload-specific latency; upgrade scope, cost, and timing; proximity to users or exchange points. |
| Delivery and resilience | Permitting path; natural hazards and climate; equipment lead times; land and infrastructure for expansion; community and environmental impacts; local workforce and construction needs. |
Keep the provider’s response, drawing, study, permit record, and validity date with every entry. If two candidates are evaluated with different assumptions, the resulting score is not comparable.
Check delivery, hazards, and the ability to expand
Power, water, and fiber can all be technically possible yet arrive too late or at a cost that breaks the project. Add these checks before selecting a preferred site.
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Permitting and approvals
- Map planning, building, environmental, water, discharge, air-quality, generation, road, and telecommunications approvals.
- Identify the authority responsible for each approval, the consultation requirements, and dependencies between permits.
- Ask whether the project’s scale triggers additional review, public hearings, environmental assessment, or limits on operating hours.
- Build approval durations and appeal or redesign risk into the critical path.
Hazards and climate exposure
Evaluate flood, wildfire, extreme heat, severe storms, seismic risk, drought, smoke, and other hazards relevant to the jurisdiction. Connect each hazard to infrastructure: utility corridors, substations, water intakes, carrier routes, roads, fuel supply, and worker access. A site’s average climate is less useful than the conditions under which cooling, power delivery, and emergency logistics are most stressed.
Expansion land and shared infrastructure
Reserve land for future halls, substations, transformers, mechanical plant, water treatment, roads, and security setbacks. Confirm that zoning, easements, utility corridors, and neighboring parcels allow the planned phases. ASHRAE’s siting framework emphasizes planning for future land, substations, and mechanical systems; an initial building that consumes the only feasible expansion area can make later capacity impossible.
Community and resource competition
Document local employment, construction capacity, housing pressure, traffic, noise, emissions, water competition, and environmental effects. Early engagement can reveal restrictions or mitigation costs that do not appear in utility maps. Canada’s principles emphasize protecting local water supplies and transparently measuring environmental impacts; use those principles as a policy reference in Canada and check the equivalent obligations elsewhere.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Choose a scoring method without hiding uncertainty
Do not assign numerical scores until the project requirements and evidence quality are clear. A simple average can make a site that fails a critical threshold appear acceptable because it scores well on unrelated features.
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Define non-negotiable thresholds for the workload, such as a minimum firm power date, a maximum acceptable latency, a legally available water source, required route diversity, or a permitted expansion phase. A candidate that misses a hard gate is infeasible unless the project scope or design changes.
Then weight the remaining criteria
For candidates that pass the gates, publish the assumptions, source dates, weighting, and uncertainty range. Separate at least these categories:
- Capacity and schedule certainty.
- Total connection, upgrade, and operating cost.
- Reliability and resilience.
- Water stress, rights, cooling demand, and wastewater feasibility.
- Network capacity, diversity, and workload-specific latency.
- Permitting, hazard, community, and expansion risk.
Use ranges where a utility, carrier, or authority has not supplied a firm value. Show which result changes if a dependency slips or a cost estimate increases. Never convert an unverified map feature into a precise score.
Follow a staged site-comparison process
- Write the workload brief. Record IT load now and at each expansion phase, rack density, cooling design, reliability objective, occupancy pattern, user and facility endpoints, and required service dates.
- Create the evidence template. Use identical power, water, network, delivery, and resilience fields for every candidate. Add a source, date, confidence label, and dependency field.
- Screen for fatal constraints. Remove parcels with no plausible legal access, unacceptable hazards, incompatible zoning, or a clear failure against the workload’s hard thresholds.
- Request utility studies. Ask the electric, water, wastewater, and telecommunications providers for written capacity, route, upgrade, cost, and schedule information tied to the parcel and project phases.
- Validate the physical path. Walk or survey proposed utility corridors, entrances, easements, conduit routes, access roads, flood elevations, and space for substations and mechanical systems.
- Model operating conditions. Test peak electrical load, hot and dry weather, drought restrictions, cooling performance, wastewater discharge, network failure scenarios, and expansion overlap.
- Map approvals and dependencies. Put permits, studies, equipment orders, utility construction, carrier work, and commissioning on one schedule. Identify the dependency that controls the in-service date.
- Apply hard gates and weighted scoring. Publish assumptions and uncertainty ranges, and keep provider-confirmed facts separate from estimates.
- Negotiate conditional commitments. Before land purchase or construction notice, obtain written validity periods, milestones, cost responsibilities, remedies, and conditions for power, water, wastewater, and network delivery.
- Refresh the decision. Recheck utility queues, tariffs, water restrictions, carrier plans, permits, equipment lead times, and hazard information before each irreversible commitment.
Use operational metrics after feasibility is established
Metrics help compare designs and monitor the selected site, but they cannot replace confirmation that local supplies exist. The ASHRAE AI Data Center Energy Performance Framework identifies PUE (Power Usage Effectiveness), WUE (Water Usage Effectiveness), WUI (Water Usage Impact), CUE (Carbon Usage Effectiveness), DCRE (Data Center Resource Effectiveness), and ITWC (Information Technology Work Capacity) as relevant measures.
| Metric | How to use it in a location decision |
|---|---|
| PUE | Compare total facility energy with IT energy for the proposed design and operating conditions. |
| WUE | Track water consumed per unit of IT work and test sensitivity to cooling mode and climate. |
| WUI | Consider the local water-scarcity impact rather than treating every unit of water as equivalent. |
| CUE | Examine carbon implications of the facility and its electricity supply. |
| DCRE | View resource performance across the facility instead of optimizing one utility in isolation. |
| ITWC | Relate resource use to useful information-technology work capacity. |
Use the metrics consistently across candidates and disclose boundaries, weather assumptions, utilization, and whether indirect electricity-related water is included. A better metric result does not cure a missing permit, an uncommitted connection, or an inadequate expansion path.
Understand the scale of the grid question
ASHRAE reports that electricity consumed by data centers in the United States tripled between 2014 and 2023 and represented about 4.4% of national consumption in 2023. That is national context, not evidence that any particular region or parcel can serve a project. It does explain why utilities and regulators may scrutinize large new loads, queue positions, upgrade costs, and the timing of generation and transmission work.
Common comparison mistakes and their fixes
- Mistake: treating nearby infrastructure as available capacity. Fix: obtain a utility or carrier confirmation for the parcel, project load, upgrade scope, and delivery date.
- Mistake: using annual rainfall as a water-feasibility test. Fix: assess treatment and delivery capacity, legal rights, drought conditions, competing uses, wastewater, and cooling demand.
- Mistake: counting one fiber route as resilience. Fix: verify physically diverse paths and shared-risk sections from the parcel to the relevant network points.
- Mistake: choosing a location before defining endpoints. Fix: measure latency requirements for users, exchanges, storage, control systems, and recovery sites.
- Mistake: scoring uncertain estimates as facts. Fix: label source, date, confidence, assumptions, and uncertainty range; use hard gates for critical requirements.
- Mistake: optimizing water or energy in isolation. Fix: compare direct water, electricity use, electricity-related water, carbon, and local scarcity together.
- Mistake: ignoring the expansion phase. Fix: reserve land, utility corridors, substations, mechanical capacity, and permits for the full growth plan.
- Mistake: assuming policy guidance is universal law. Fix: identify the jurisdiction and confirm current requirements with local utilities, regulators, water authorities, carriers, and planning agencies.
Final decision checklist
- The workload, endpoints, IT load, cooling design, reliability target, and expansion dates are documented.
- The electric utility has stated deliverable capacity, service dates, interconnection conditions, reliability, and upgrade responsibility.
- Water source, rights, treatment, delivery, drought constraints, wastewater, cooling demand, and indirect electricity-related water are evaluated.
- Carriers have confirmed physical routes, capacity, diversity, upgrade scope, cost, delivery dates, and relevant latency.
- Permits, hazards, construction logistics, equipment lead times, community impacts, and expansion land are on the project schedule.
- Hard thresholds, scoring weights, assumptions, source dates, and uncertainty ranges are published internally.
- Conditional commitments are documented before irreversible land or construction decisions.
The decision is ready only when the candidate works as an integrated power, water, network, permitting, and expansion system. If one critical dependency remains unconfirmed, classify the site as conditional rather than feasible and make the next provider or authority commitment the immediate decision gate.
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