Data Center Growth and Air Pollution: What EHS Leaders Need to Know

Data centers support the digital services that businesses and households use every day. Their environmental footprint, however, extends beyond electricity consumption. Decisions about onsite power generation and air permitting deserve attention from environmental, health, and safety leaders before construction begins.

A sound EHS strategy should connect project design, emissions assessment, and operational accountability. That means understanding what equipment will operate, who controls it, and how the proposed facility fits within the applicable permitting framework. Treating those questions as early planning priorities can help organizations identify problems before they become expensive disputes.

The Reported Controversy

A September 27, 2026, Guardian report described allegations that data center developers divide pollution sources among minor permits to avoid major-source review. Examples included Amazon and Duke Energy’s North Carolina generators and New Mexico’s Project Jupiter. Amazon defended separate permitting as reflecting ownership and operational arrangements. The report said Project Jupiter’s disputed application was withdrawn.

These are reported allegations, not established findings that every project using separate permits violates the law.

The broader management question is whether a permitting strategy accurately reflects the facility being developed. Separate contracts, equipment packages, or construction phases should prompt careful review rather than an automatic assumption that each component qualifies independently.

For EHS leaders, the useful response is to ask for the underlying analysis. What facts support the proposed source boundaries? Which assumptions depend on contractual arrangements? How would later expansion affect the assessment?

A project team should be able to explain these decisions consistently to regulators, executives, and nearby communities. If its explanation relies on information that has not been documented or verified, that gap deserves attention before commitments become difficult to change.

Understanding Air Permits

EPA identifies three categories of New Source Review permitting: Prevention of Significant Deterioration, nonattainment NSR, and minor-source permitting. Major-source requirements depend partly on whether the area meets applicable ambient air quality standards. Most NSR permits are issued by state or local agencies.

Permits establish enforceable requirements governing construction, emissions, and operation. A minor-source permit therefore carries obligations even when major-source review does not apply.

Determining the source itself is another essential step. EPA’s guidance describes three factors for grouping activities under relevant NSR and Title V definitions: common control, contiguous or adjacent properties, and the same major industrial grouping. Its adjacency guidance generally emphasizes physical proximity for industries outside oil and gas.

Where PSD applies, EPA identifies requirements including best available control technology, air quality analysis, additional impacts analysis, and public involvement.

For project teams, these distinctions argue against using one generic threshold or a simple equipment count to decide applicability. The assessment should identify the relevant program, jurisdiction, pollutants, source boundaries, and operating assumptions. EHS leaders should seek a documented determination from qualified permitting specialists and resolve uncertainties with the responsible authority before relying on a proposed permitting route.

Environmental and Health Concerns

Air permitting decisions matter because pollutant exposure can affect people beyond a facility’s boundary. EPA links particulate pollution with aggravated asthma, reduced lung function, cardiovascular effects, and premature death in people with heart or lung disease. Children, older adults, and people with existing conditions can be especially vulnerable.

These general findings do not establish the health impact of any particular data center. Project-specific conclusions require evidence about emissions, operating patterns, atmospheric dispersion, and existing air quality.

EHS teams should therefore distinguish annual emissions totals from the conditions that determine exposure. They should ask how proposed operations interact with surrounding land uses and existing pollution sources.

That analysis also supports clearer communication. Neighbors need understandable information about expected operations and the basis for environmental assessments. Explaining uncertainty openly is more useful than making broad assurances that cannot be supported by the project’s available evidence.

Practical Implications for EHS Leaders

The following management practices can help translate permitting requirements into operational decisions.

Build a complete equipment inventory. Include permanent and temporary combustion equipment, planned additions, and equipment supplied by contractors or utilities. Assign responsibility for keeping the inventory current as the design changes.

Document the source determination. Record the facts supporting ownership, control, location, and industrial grouping. Keep relevant agreements and agency correspondence accessible. Revisit the analysis when operating responsibilities or development plans change.

Align emissions assumptions with intended operations. Check whether calculations represent anticipated testing, maintenance, outages, and other permitted activities. Have specialists verify which operating limits can support the applicability determination and what monitoring those limits require.

Integrate environmental review into project approvals. Establish an EHS review point before equipment purchases, construction commitments, or operating changes. A change that appears minor commercially may alter the assumptions behind a permit.

Make compliance measurable. Translate permit conditions into assigned tasks, operating procedures, records, and escalation triggers. Operators should understand which activities require logging and when an equipment or scheduling change needs review.

Engage communities with specific information. Explain the proposed equipment, expected operating patterns, and environmental assessment in accessible language. Provide a clear route for questions and document how concerns are addressed.

Together, these practices encourage a project-wide view of environmental responsibility. They also make it easier to identify inconsistencies between the approved design, the permit application, and actual operations before those inconsistencies grow.

Conclusion

Data center development places environmental decision-making alongside commercial and engineering priorities. EHS leaders can contribute by making the factual basis of permitting decisions visible and ensuring that operational practices follow through on project commitments.

The central task is to understand the full facility, document the applicable requirements, and maintain that understanding as the project evolves. Early scrutiny of source boundaries, emissions assumptions, and accountability can support more defensible decisions. Clear records and communication then help organizations explain those decisions to the people responsible for approving, operating, and living near the facility.