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Data centers can put concentrated demands on electricity, water, and roads, but the local effect depends on where a facility is built, how it is designed, how quickly it comes online, and what utilities and public agencies require. National totals show why these projects matter; they cannot predict a particular town’s bills, water supply, or traffic.
For a proposed site, the useful evidence is local: the utility’s interconnection and cost-allocation plans, the facility’s water and cooling design, and traffic and road reviews tied to its construction schedule and access routes.
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Why national data-center growth does not tell you what one town will experience
A data center is a large, concentrated electricity load, often planned at a scale that requires coordination with a utility and other infrastructure providers. Its effect is not determined by the building alone. The amount and timing of demand, local grid capacity, cooling design, water sources, construction activity, and the terms of public approvals all shape what happens around the site.
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National estimates are useful for understanding the scale of the sector, but they combine facilities across different regions and operating conditions. A national electricity share does not indicate how much new demand will fall on a specific utility. Likewise, national water estimates do not show how much water a particular facility will take from a town’s system, and they say nothing by themselves about its traffic.
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The most reliable way to assess a proposal is to separate the three infrastructure pathways—power, water, and roads—and then examine what the project documents say about demand, timing, mitigation, monitoring, and who pays.
How data centers affect local electricity systems
A fast-growing national load, measured as a forecast rather than a fact about every location
Lawrence Berkeley National Laboratory’s June 2026 report, the 2025 Update, estimates that data centers could use 649 terawatt-hours (TWh) of electricity in the United States in 2030 in its reference case. That would equal 11.8% of total U.S. electricity use. The report’s modeled scenarios range from 9.5% to 15.3% of national electricity use. These are projections, not a measurement of 2030 consumption or a prediction for any one community.
The LBNL estimate uses a bottom-up model drawing on planned shipments of information-technology equipment, electricity use per device, cooling simulations, and facility type and location. The range matters: future demand depends on assumptions about equipment deployment and facility operation. It is more accurate to present the 11.8% reference case alongside the 9.5%–15.3% modeled range than to treat one forecast as certain.
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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →For historical context, LBNL’s December 2024 report estimated that U.S. data centers used 176 TWh in 2023, equivalent to 4.4% of U.S. electricity consumption. That report projected 325–580 TWh, or 6.7%–12.0% of U.S. electricity, in 2028 under different scenarios. The 2023 figure is a historical estimate; the 2028 values are projections from a 2024 report. They should not be read as current measured consumption or directly substituted for the newer 2030 forecast.
| Estimate | Value | What it represents |
|---|---|---|
| U.S. data-center electricity use in 2023 | 176 TWh; 4.4% of U.S. electricity | LBNL estimate published in 2024 |
| U.S. data-center electricity use in 2028 | 325–580 TWh; 6.7%–12.0% | Scenario projections in LBNL’s 2024 report |
| U.S. data-center electricity use in 2030 | 649 TWh; 11.8% in the reference case | LBNL’s June 2026 estimate; modeled scenarios range from 9.5% to 15.3% of U.S. electricity |
Why a large new load can prompt utility and grid work
When a large load seeks service, the relevant utility must assess how it can be interconnected and served. Depending on local conditions and the proposed schedule, planning may involve grid infrastructure or additional electricity supply. A project that ramps up quickly can create a different planning challenge from one whose demand grows gradually. The national forecasts do not establish what work a named utility will need to do; that requires utility-specific planning and project records.
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The U.S. Department of Energy’s Secretary of Energy Advisory Board working group report, Powering AI and Data Center Infrastructure Recommendations (July 2024), identifies electricity-supply bottlenecks, flexible firm supply, and possible load flexibility or grid services as planning issues. Some computing demand may be shiftable or adjustable, but that does not mean every facility can change its load on demand, or that flexibility would remove the need for new infrastructure. The project’s operating commitments and technical capabilities need to be established rather than assumed.
Do data centers automatically raise household electricity bills?
No universal bill effect is established by the national electricity estimates. Whether existing customers bear costs depends on the local utility’s plans, regulatory decisions, tariffs, and cost-allocation arrangements. A review should identify what grid work is planned, how it will be funded, how the facility will be charged, and what protections apply to other customers. DOE’s advisory recommendations frame reliability and affordability for existing customers as policy objectives; they do not prove the outcome for a particular project.
For residents evaluating a proposal, the key documents are therefore the utility’s service and infrastructure plans and the relevant regulator’s decisions—not a national projection alone. A promise of jobs or tax revenue is not evidence that ratepayers will be protected, just as a projected increase in electricity demand is not proof that household bills will rise.
How data centers affect water supplies
Direct water use and power-related water use are different measures
Cooling is one source of a data center’s direct water consumption. LBNL’s 2024 report estimated direct water consumption by U.S. data centers at 66 billion liters in 2023. That national estimate does not establish a standard amount for a facility: site-level demand depends on the size and design of the operation, cooling method, climate, and operating conditions.
The same report estimated nearly 800 billion liters of indirect water consumption associated with the electricity used by data centers in 2023. This describes water associated with electricity generation under regional power mixes. It is not water delivered to data-center sites by local municipal systems, nor a measure of local withdrawals caused by a specific project. The indirect estimate can vary with where electricity is generated and how it is produced. LBNL also noted that facility-level data were unavailable for this attribution and that power purchase agreements or behind-the-meter generation can affect estimates.
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Keeping those accounting boundaries separate prevents a misleading comparison: direct facility water is a site-level supply and operations question, while indirect water is part of the electricity-generation footprint.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteWhat a project’s water review should establish
Before judging whether a proposed data center will strain local water resources, look for project-specific answers to these questions:
- Which source will supply the facility: a municipal system, another provider, reclaimed water, or another source?
- What cooling approach is planned, and what are the projected annual and peak water demands?
- Can reclaimed water be used, and what infrastructure would be needed to deliver it?
- How will wastewater and any cooling-system blowdown be handled?
- How does the projected demand fit the area’s water availability, including seasonal or drought constraints?
- Will water use be tracked and reported, and are the reporting obligations enforceable if the facility’s operations change?
These questions matter because a total annual estimate alone may not show when demand occurs or whether the source can meet it. The source, peak demand, treatment and wastewater arrangements, and local water conditions together provide a more useful picture than a generic claim that data centers either do or do not use a lot of water.
Local rules vary. Linn County, Iowa’s 2026 ordinance is one jurisdictional example: it covers infrastructure issues including water and traffic, requires a water study for large projects, and provides for tracking and reporting through a water-use agreement. That requirement is not a nationwide rule, and the county example should not be taken to describe what another community requires.
What road and construction impacts can occur
Road effects are inherently site-specific. A project’s construction traffic, access routes, delivery schedule, and any proposed road improvements need to be evaluated against the roads and land uses around the actual site. Local project review can address traffic impacts, construction access, road capacity, safety, and mitigation, but the available evidence does not establish a universal traffic increase for a typical data center.
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There is also no comparable national estimate here for added trips, construction-truck volumes, road-repair costs, or the duration of disruption. A claim about congestion or road damage should therefore be grounded in the project’s traffic impact analysis, construction schedule, and comments from the road authority—not inferred from the facility type alone.
For neighbors and local officials, useful project records include the traffic study, planned construction hours and phases, designated truck routes, site access plans, road-agency review, and commitments for improvements or repair. These materials can clarify whether impacts are temporary, concentrated at certain stages, or expected to continue during operations. If a project changes its size or schedule, the assumptions behind those reviews may also need to be revisited.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare proposals and test whether commitments are meaningful
When a community is considering two or more proposals—or a project changes during review—compare like with like. The following checklist keeps the decision focused on measurable demands and enforceable arrangements rather than broad claims about benefits or harms.
- Electricity: Compare expected demand and ramp-up, interconnection and grid upgrades, the electricity supply plan, any documented load-flexibility commitments, and the tariff or cost-allocation treatment.
- Water: Compare the source, annual and peak direct consumption, cooling design, reclaimed-water use, wastewater handling, and drought or watershed constraints.
- Roads: Compare construction and operational traffic, access routes, timing, road capacity and safety, proposed improvements, and who funds mitigation.
- Accountability: Check what information is disclosed, how use and impacts will be monitored and reported, whether commitments are enforceable, and whether reviews recur if the facility expands.
- Community outcomes: Examine documented jobs, tax or other public revenue, infrastructure funding, and commitments to nearby residents. Potential benefits should be assessed alongside local resource demands and disruption.
The evidence standard should be consistent across categories. A modeled electricity forecast is not a utility’s project plan; a national water total is not a municipal withdrawal; and a general statement about construction effects is not a traffic analysis. Ask whether each figure is a national estimate, a project forecast, a binding commitment, or a measured result—and whether its date, geographic scope, and assumptions are clear.
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What early community planning can and cannot do
DOE’s July 2024 advisory working group report recommends early engagement with local tribes and communities, community benefits planning, and steps to streamline and mitigate risks from infrastructure development. It also points to operational flexibility and grid services as issues for planning. Early discussion can surface practical questions before plans are fixed, such as where infrastructure will go, which impacts require mitigation, and how commitments will be monitored.
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Engagement is not itself a guarantee of a particular outcome. Nor does a benefits plan establish that existing customers are insulated from utility costs or that water and road impacts will be acceptable. Residents should be able to connect public commitments to specific project documents, responsible agencies, reporting schedules, and mechanisms for addressing noncompliance or changed conditions.
EPRI describes possible local jobs and tax contributions alongside higher power and water needs and local disruption. Those are considerations for evaluating an individual proposal, not promises of net benefit. The number and nature of jobs, public revenues, infrastructure funding, and distribution of costs must be established through local records and commitments.
How to read the evidence for a proposed site
A practical assessment starts with the records for the named facility and the agencies responsible for each system. National reports provide context, while local reviews answer questions about consequences at the site.
- Identify the service providers and reviewing agencies. Determine which electric utility and regulator handle the load, which water provider or authority reviews supply, and which road agency evaluates access and traffic.
- Separate forecasts from commitments. Label projected electricity and water demand as estimates unless an operating agreement or approval makes specific limits or obligations enforceable.
- Check timing as well as totals. Look for ramp-up dates, peak water demand, construction phases, delivery patterns, and the schedule for grid or road work.
- Trace costs and responsibilities. Ask who funds utility upgrades, water infrastructure, road improvements, and ongoing monitoring; look for the applicable tariff, agreement, approval, or funding commitment.
- Look for monitoring and revision provisions. Find out how resource use and traffic assumptions will be reported, who can review them, and whether the project must undergo another assessment if it expands or materially changes.
If one of these records is missing, the appropriate conclusion is that the corresponding local effect has not been established—not that the effect is necessarily large or negligible. This distinction is especially important for roads, where national comparable figures are not available in the evidence discussed here.
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