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Ohio Data Center Health Risks: Diesel Generators, Fuel Cells, Air Quality
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# Ohio Data Center Health Risks: _diesel generators, fuel cells, and what residents are documenting_ A 2026 Community & Environmental Defense Services report links data-center air pollution to lung disease and premature death. ## The CEDS report: lung issues and premature death In February 2026, the **Community & Environmental Defense Services (CEDS)** released a report concluding that data-center emissions could cause breathing issues and premature deaths for residents living nearby. Researchers affiliated with the California Institute of Technology have separately modeled that data-center-associated air pollution could contribute to approximately **1,300 premature deaths annually nationwide by 2030**, concentrated in communities adjacent to large facilities. ## Reporting we relied on. - **NBC4 WCMH** — Hilliard residents concerned by data center backup generator emissions (February 2026) - **NBC4 WCMH** — Report: Data centers' air pollution associated with lung issues, death (February 2026) From the article: Modern data centers don't smoke. They emit. Hilliard's proposed Amazon facility would install 158 Tier 2 diesel backup generators plus a 73-megawatt natural-gas fuel-cell array permitted to release up to 1.45 million pounds of CO2 per day . Lima's proposed data center would site 115 diesel generators and 36 cooling towers near homes. A 2026 Community & Environmental Defense Services report links data-center air pollution to lung disease and premature death. This page documents what's actually permitted in Ohio, and what residents are doing about it. The most documented health-impact case in Ohio is the proposed 73-megawatt Bloom Energy fuel-cell array for Amazon's Cosgray Road data-center campus in Hilliard, Franklin County . The Ohio EPA's air permit allows the array to emit up to 1.45 million pounds of carbon dioxide per day . The City of Hilliard's administrative-court appeal — using the city's own filings — equates that to the daily emissions of approximately 66,000 cars . The fuel-cell array would be the largest of its kind in North America. It is sited adjacent to a residential subdivision and a Hilliard elementary school. Bloom Energy has filed an emissions report stating the project's CO2 concentrations “do not represent a cause for concern” and are “a fraction of typical ambient air concentrations.” The City of Hilliard has formally rejected that framing and requested an independent air-quality study, which Ohio EPA has not required as of April 2026. Resident Annie Cannelongo's formal comments to the Ohio Power Siting Board capture the legal-procedural concern: “There is no real research about the safety of this kind of power plant, and it's sitting adjacent to a neighborhood and elementary school in Hilliard.” Separately from the fuel cells, Amazon's Hilliard project also proposes 158 Tier 2 diesel backup generators . Per the air-permit application, these generators would emit carbon monoxide, nitrogen oxides (NOx), particulate matter (PM2.5), and sulfur dioxide (SO2) when running. Ohio EPA confirmed in February 2026 it would hold a public hearing on the diesel-generator permit after Hilliard residents submitted 160+ signed petition letters. As of April 2026, a hearing date has not been set. Lima, Ohio, in Allen County , faces a parallel proposal: 115 diesel generators and 36 cooling towers sited between North Cole Street and West Bluelick Road. Ohio EPA hosted a public meeting in March 2026 where residents asked specifically how far emissions would carry from the diesel generators to nearby homes and schools. Ohio EPA's response: the company “was required to do NOx modeling for the emissions from the engines, and they did pass our lower standard.” The standard industry response to generator-emissions concerns is that backup units run only during emergencies and brief monthly testing. The data does not support that as a clean signal. According to the World Resources Institute and 2025 EPA data: The Ohio EPA's air-permit framework for backup generators allows up to 100 hours of operation per year per generator without triggering “major source” classification. Across 158 Hilliard generators, that's a theoretical 15,800 hours of annual diesel operation — though actual operation is normally far below that ceiling. In February 2026, the Community & Environmental Defense Services (CEDS) released a report concluding that data-center emissions could cause breathing issues and premature deaths for residents living nearby. The report recommends that states require health impact assessments before data centers are built — a requirement Ohio does not currently impose. Researchers affiliated with the California Institute of Technology have separately modeled that data-center-associated air pollution could contribute to approximately 1,300 premature deaths annually nationwide by 2030 , concentrated in communities adjacent to large facilities. Ohio's central and northeast clusters — Franklin , Licking , Trumbull , Mahoning, and Union County — are among the densest in the U.S. east of Virginia and so will absorb a disproportionate share of any health impact projected from this growth. The Ohio EPA's air permit process does not require operators to model short-term PM2.5 spikes during simultaneous generator testing. It models annual averages against the National Ambient Air Quality Standards (NAAQS). This is a regulatory gap that residents in Hilliard, Lima, and other affected communities have repeatedly flagged in formal comments. Bloom Energy's fuel cells produce far less PM2.5 and NOx per kilowatt-hour than diesel generators — about 90% less, by Bloom's own figures. They run continuously rather than only during testing, however, so the cumulative emissions are different in shape. For Hilliard's 73-megawatt array operating roughly 24 hours a day, the year-round CO2 ceiling of 1.45M lbs/day translates to approximately 265,000 metric tons per year — comparable to a small natural-gas peaker plant. Fuel cells also produce nitrogen oxides at lower rates than turbines, but at meaningfully higher rates than zero-emission alternatives like grid-supplied renewable power. The choice between fuel cells and diesel generators is not the only option; the choice between behind-the-meter generation and grid-supplied power is the underlying question. HB 15's authorization of behind-the-meter generation is what made the Hilliard fuel-cell plan possible without going through the Ohio Power Siting Board's full review. Ohio's air-permit framework for data centers covers: The single most important action: file formal written comments during the air permit public notice period . Comments become part of the permit record and are used by Ohio EPA staff in reviewing the permit. Residents have successfully forced Ohio EPA to hold public hearings (Hilliard, Lima) by submitting comment volume above 100 letters per project. The data is increasingly concerning. A February 2026 Community & Environmental Defense Services report links data center diesel-generator and fuel-cell emissions to lung disease and premature death. Caltech-affiliated researchers project ~1,300 premature deaths annually nationwide by 2030 from data-center air pollution. Hilliard's proposed facility would emit up to 1.45 million pounds of CO2 per day. The 73-megawatt Bloom Energy array is permitted to emit up to 1.45M lbs of CO2 per day, equivalent to roughly 66,000 cars or a small natural-gas peaker plant. It would be the largest fuel-cell installation in North America. Sited adjacent to a residential subdivision and Hilliard elementary school, with no required health impact assessment. They emit 200 to 600 times more nitrogen oxides per kWh than natural gas plants. Monthly testing produces 30-60 minutes of full-load emissions in residential areas. Diesel PM2.5 penetrates deep into lung tissue. Ohio EPA permits up to 100 hours per generator per year (15,800 hours total across Hilliard's 158 generators). Multiple data centers in the same airshed can compound exposure. No. Ohio EPA's air permit framework requires NAAQS compliance modeling on annual averages but does not require health impact assessment, cumulative impact modeling, short-term peak modeling, or independent monitoring. The CEDS February 2026 report recommends Ohio adopt health impact assessment requirements. PM2.5 is fine particulate matter at 2.5 microns or smaller. It is the air pollutant most strongly associated with cardiovascular and respiratory disease, even at concentrations below current EPA standards. Diesel exhaust is a primary source. Short-term PM2.5 spikes from generator testing can trigger asthma attacks and heart attacks in vulnerable populations even when annual averages are within standards. Volunteers from Ohio Residents for Responsible Development need 413,488 valid signatures from at least half of… Article address: https://stopohiodatacenters.org/data-center-health-risks-ohio Found automatically from: Web search Article published: unknown This record was added automatically from a public article check. Its claims have not been reviewed by the site's editors and are attributed to the source above. Its verification status is Unverified, and any connection to artificial intelligence has not been established.