A&S AI Literacy Module

AI’s Water Footprint

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33 minutes · self-paced · no prerequisites

AI’s Water Footprint: What the Evidence Can—and Cannot—Tell Us

AI systems run in data centers. Those facilities can use water directly for cooling and indirectly through electricity generation—but a single number cannot describe every workload or every community. You will use three peer-reviewed studies to evaluate a fictional proposal in Central New York.

Instructor

Tao Wen

Associate Professor, Department of Earth and Environmental Sciences, Syracuse University. Professor Wen’s teaching and research connect water quality, hydrogeochemistry, data science, and machine learning in coupled human-natural systems.

Instructor profile
01 Name the boundary

Distinguish withdrawal from consumption, direct from indirect use, and quantity from quality.

02 Compare evidence types

Do not treat a projection, a broad assessment, and screening-level risks as equivalent.

03 Make a local judgment

Evaluate a claim and identify evidence still needed for one proposed site.

2 minCommunity scenario
7 minWater pathways
2 minCheckpoint
7 minThree studies
10 minEvidence activity
5 minQuiz

Opening scenario · 2 minutes

A proposal arrives in Central New York

This scenario is fictional. It is designed to show why national estimates cannot answer a local water question on their own.

Community meeting · October 2027
A company proposes an AI data center near a Central New York community. Its fact sheet says the facility will be “water-smart.” A social-media post replies that “AI data centers drain drinking-water supplies and poison fish.” Local officials ask: What can we conclude now, and what must we investigate?

Professor Wen’s water-scientist lens

Start with the watershed, not the headline

A water footprint has a location, a season, a source, a return flow, and a receiving environment. The same facility design can have different consequences in different watersheds.

Before seeing the evidence, which question would you ask first?

Video 1 · 7 minutes

Where AI’s water footprint comes from

Four distinctions keep a water claim from collapsing different processes into one number.

Video 1: direct and indirect water pathways, withdrawal and consumption, quantity and quality.

Synthetic narration disclosure: This video uses an authorized local clone of Professor Tao Wen’s voice, generated with Chatterbox and automatically watermarked. Read the narration notice.

Video 1 transcript

Open the full text transcript. Synchronized English captions are available from the video controls.

Withdrawal

Water taken from a river, lake, aquifer, or utility—even if some is later returned.

Consumption

The portion not returned to the same water source, often because it evaporates or is incorporated into a product.

Quantity

How much water is withdrawn or consumed, when, and from where.

Quality

Properties such as temperature, salts, treatment chemicals, and other constituents in a discharge.

Original concept diagram

One AI workload, two water pathways

System boundary matters
AI workloadtraining or inference
Direct Facility cooling Water used at the data-center site
Indirect Electricity supply Water associated with generating electricity
Local contextgrid · climate · source water · season
Direct water use occurs at the facility. Indirect water use is associated with electricity generation. Both depend on design and location. This original diagram synthesizes concepts from Xiao et al. (2025) and Lei et al. (2025); its local-context questions are informed by Jager and Yoon (2026) and the AAAS EPI Center guide (2026).
Text alternative for the pathway diagram

An AI training or inference workload branches into two pathways. The direct pathway reaches facility cooling. The indirect pathway reaches the electricity supply. Both pathways then pass through local context: the electricity grid, climate, source water, and season.

Professor Wen’s water-scientist lens

Ask whether a number describes withdrawal or consumption and whether it includes direct, indirect, or total water use.

Checkpoint · 2 minutes

Keep the boundaries straight

Sort all four examples. Feedback explains how the distinctions overlap.

1. A cooling tower evaporates water at the facility. Which description fits best?
2. A power plant uses water while supplying electricity to the facility. From the data center’s footprint perspective, this is:
3. A facility takes water from a river for cooling, before we know how much is returned. What can we already call this?
4. A permit review asks about discharge temperature and chemistry. Which concern is being evaluated?

Video 2 · 7 minutes

What three peer-reviewed studies show—and do not show

Each paper answers a different kind of question. Treat its study design as part of the evidence.

Video 2: projections, workload-level estimates, screening-level risks, and local evidence gaps.

Synthetic narration disclosure: This video uses an authorized local clone of Professor Tao Wen’s voice, generated with Chatterbox and automatically watermarked. Read the narration notice.

Video 2 transcript

Open the full text transcript. Synchronized English captions are available from the video controls.

Modeled projection01

Xiao et al. (2025)

Projected annual U.S. AI-server water use: 731–1,125 million m³.

Limit: a national model projection—not facility meter readings.

Workload assessment02

Lei et al. (2025)

Estimated water use across data-center workloads varied by more than 10,000-fold.

Server efficiency, cooling, the electricity grid, climate, and utilization all matter.

Limit: data-center workloads broadly—not one commercial AI service.

Risk screening03

Jager and Yoon (2026)

Data centers: an emerging threat to freshwater biodiversity in the United States

Identified potential pathways involving thermal effects, lower-quality discharge, water stress, entrainment, and altered flows.

Limit: screening-level risks—not demonstrated harm at a particular site.

Text alternative for the paper comparison
  • Xiao and colleagues provide a modeled U.S. projection for AI servers and estimate that indirect electricity-related water makes up most of the total.
  • Lei and colleagues show that estimates vary by more than 10,000-fold across data-center workloads because infrastructure and location differ.
  • Jager and Yoon screen potential water and ecosystem risk pathways; they do not demonstrate damage at a particular site.

Professor Wen’s water-scientist lens

A national projection can frame scale. A screening study can flag pathways. Neither replaces local flow records, chemistry, temperature, permits, or ecological conditions.

Evidence activity · 9–10 minutes

Advise the fictional community

Classify three claims, justify each choice, then write a 50–75-word recommendation grounded in at least two research evidence cards and one concrete question for the developer.

Supporting AI-literacy method

Check the boundary before trusting the sentence

For each claim: identify one place it could be wrong, one thing to check, and one source that could resolve it.

What the three classification labels mean

Supported with qualifier

The evidence backs the main idea, but only when you keep an important limiting phrase—for example, “in this modeled U.S. projection.”

Overstated / context-dependent

The claim may fit some situations, but it sounds too general because important conditions can change the answer.

Needs site-specific evidence

The studies show what could happen, but information from this proposed facility and its local water system is needed before deciding.

Community recommendation

What should officials do next?

0 words

Use 50–75 words. Cite at least two research evidence cards, distinguish one system boundary, and turn one missing local input into a concrete question for the developer. The AAAS guide helps frame that question but does not count as one of the two research cards.

In plain language: a system boundary tells the reader what an estimate includes and leaves out. You might distinguish on-site direct water from electricity-related indirect water, or a national projection from measurements at this proposed site.

Choose an equivalent response format

    Three-criterion rubric

    CriterionStrongDevelopingRevise
    Evidence fitUses at least two cards accurately.Uses evidence but blurs one limit.Makes claims the cards do not support.
    System boundary—what is countedNames direct/indirect or national/local limits.Mentions water use without saying what is included.Treats one number as universal.
    Calibrated uncertaintyStates one missing local input and a next step.Signals uncertainty but not what would resolve it.Claims certain benefit or harm.

    Keyboard users can focus this table region and scroll horizontally if needed.

    Five-question quiz · 4–5 minutes

    Check your water-evidence reasoning

    Each question assesses a different concept from the module.

    Module complete

    Carry the boundary with the number

    A useful water claim states what was measured or modeled, where, over what system boundary, and what evidence is still missing.

    01

    Separate pathways

    Direct cooling and indirect electricity-related water use can point to different interventions.

    02

    Match claim to study

    Projections estimate scale; risk screens identify pathways; neither proves local harm.

    03

    Request local evidence

    Cooling, source water, flow, chemistry, temperature, grid mix, and permit conditions turn a headline into an evaluation.

    Professor Wen’s water-scientist lens

    The honest answer is sometimes a better question

    “What evidence would change our conclusion?” is not a retreat from expertise. It is how watershed context, hydrogeochemistry, and uncertainty become part of a responsible decision.

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