Claims about cancer, sleep, livestock, and wildlife need a source-to-exposure-to-outcome chain. The reviewed evidence does not establish data centers as a direct cancer or livestock-death cause; specific noise, diesel, and light pathways still deserve measurement.
Washington Ecology's corrected analysis shows why receptor choice matters. Under projected-actual emissions, data-center engines contributed 0.7 per million at the east residence with the highest cumulative risk, and 19 per million at the east residence maximally impacted by data centers.
Metric: modeled lifetime cancer-risk increase per million. Observed cases and national rates are outside its scope. Each total already includes the data-center contribution, so adding the paired bars would double-count it. Washington Ecology, 2020, projected-actual emissions scenario.
| Category | Data-center engines (per million) | All sources combined (per million) |
|---|---|---|
| East residence · highest cumulative risk | 0.7 per million | 67 per million |
| East residence · highest data-center risk estimate | 19 per million | 51 per million |
The evidence does not justify treating a data-center building itself as a disease source. Evaluate identifiable pathways, especially diesel exhaust, excessive noise, and nighttime light, with exposure-specific evidence.
Evaluate a local claim by mapping a specific source to measured exposure at the affected receptor. Quantify dose and duration, then compare the outcome with appropriate medical, veterinary, or ecological evidence.
Living near a data center causes cancer.
No credible data-center-specific causal evidence was identified. NCI finds no consistent association between non-ionizing EMF sources and cancer. Diesel exhaust is a real chronic inhalation hazard, so assess actual engine exposure at the site. Proximity alone cannot establish risk.
Data centers cause severe stress and sleep deprivation.
Excessive environmental noise can disturb sleep and affect well-being. A data-center-specific claim still needs nighttime indoor and outdoor exposure, duration, spectrum, background, and full-load operating evidence.
Data centers kill nearby livestock.
The review found no credible primary source directly tying a data center to livestock deaths. A valid case would require veterinary and pathology records, exposure testing, a timeline, comparison animals, and alternative causes.
Data centers kill wildlife.
Human-caused noise and nighttime light can affect wildlife. Those general sources support site-specific measurement; they do not establish a universal data-center mortality effect or prove a particular death.
Without these inputs, a project-specific verdict is incomplete. Treat missing evidence as an open question.
Low- and mid-frequency non-ionizing electromagnetic fields and cancer evidence
Reviews electromagnetic-field evidence generally. It does not examine data-center neighbors or measure conditions at a proposed site.Human-health hazards from acute and chronic diesel-exhaust inhalation
Establishes the hazard from diesel exhaust. Exposure and risk from a named engine fleet require site-specific evidence. Engine technology and controls have also changed since the assessment.Diesel-particle monitoring, health-risk assessment, and permitting in Quincy, Washington
One community and one modeling process. Washington Ecology identified technical issues in the owner-funded 2018 assessment and later performed follow-up analysis.Cumulative diesel-particle and nitrogen-dioxide health-risk modeling for Quincy, Washington
This agency re-analysis covers one community. It reports modeled lifetime risk under specified emissions and receptor scenarios. It does not report observed cancer cases or a national rate.Environmental-noise exposure, sleep, annoyance, and health
Covers general environmental-noise health effects. It does not provide data-center epidemiology, and its long-term guideline metrics are not interchangeable with a single spot measurement.Effects of human-caused noise on ungulates and small mammals
Synthesizes evidence primarily about oil and gas development. It supports a general noise pathway but cannot establish a data-center-specific wildlife effect.Nighttime artificial light, bird disorientation, and collision risk
General building-lighting pathway rather than evidence of a data-center-specific effect. Species, migration, site, and lighting design determine exposure.Claims linking data centers directly to cancer, sleep loss, livestock deaths, and wildlife harm
This targeted primary-source review was not registered or systematic. Finding no direct evidence cannot prove that harm is impossible.Data-center zoning and post-construction verification in Fairfax County
This local review process is not a national standard. Routine generator testing can be excluded from the required study under defined conditions.