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St. Louis health board hears evidence and caution about public-health risks from data centers
Summary
Public-health staff told the St. Louis Board of Health that data centers can generate loud, continuous noise, emit PM2.5 and nitrogen oxides from backup generators, and demand substantial water and power; board members urged stronger monitoring, transparency dashboards and consideration of community benefit agreements.
Megan Clark, an epidemiologist in the St. Louis Department of Health’s environmental health unit, told the Board of Health and Hospitals that ‘‘In St. Louis. Currently, we have 12 active or planned data centers’’ concentrated in downtown and Midtown neighborhoods and described potential public-health impacts from those facilities.
Clark told board members that data centers require high-capacity electricity, continuous cooling systems and backup generators with on-site fuel storage. She said the facilities can create continuous environmental noise from cooling systems and backup power that research has measured ‘‘as high as 96 dB,’’ and that emissions from generators can include nitrogen oxides and fine particulate matter (PM2.5), pollutants associated with asthma, cardiovascular disease, adverse birth outcomes and premature mortality.
The presentation highlighted three areas for municipal and health review: noise, air quality and water/energy use. For noise, Clark recommended baseline and post-construction monitoring and enforceable operational limits, including assessment of low-frequency noise. For air pollution, she proposed annual reporting of generator testing schedules, fuel consumption and emissions estimates and consideration of cleaner backup technologies. For water and energy, Clark urged site-specific evaluation during zoning and permitting, including analysis of cooling technologies and total environmental impact.
Board members pressed for practical mitigation steps and regulatory options. Dr. Melissa Tabby asked whether the board could require specific mitigations and accountability; Clark and the commissioner said the city’s permitting and procurement materials already include some environmental and noise standards and that the health department can support monitoring. Dedra Griffith and others flagged sleep disruption and urban-heat-island effects, noting that continuous noise and heat can worsen long-term inflammatory markers and chronic conditions and that heat impacts can extend miles from a site.
Several board members raised community-facing transparency measures. Members urged exploring community benefit agreements and public dashboards showing monitoring results, and asked staff to gather examples of existing CBAs and corporate dashboards. The health department said it will collect the questions and place Clark’s slides in the board folder.
Clark and the board emphasized that the evidence base is still emerging: the presentation noted knowledge gaps and recommended ongoing research to support evidence-based policy. The board asked staff to follow up with additional analysis, including a planned 10-year hospitalization study the department is preparing that will examine trends in the St. Louis area.
The board did not take formal regulatory action at the meeting; members directed staff to continue gathering information, explore community-benefit approaches and report back at a future meeting.
