Data centers could erase decades of air quality gains

New research by a Houston research center models how the fast-growing data center buildout in Texas could reverse decades of air quality improvements by massively increasing power-sector emissions. In a scenario where planned facilities plug into the projected grid mix, fine particulate matter (soot) from power generation would more than triple within five years to levels not seen since 2006, NOx emissions would climb about 136 percent toward early-2000s concentrations, and carbon dioxide from the sector would rise roughly 90 percent above 2025 levels. The report warns these shifts could leave future generations breathing markedly dirtier air.

The pollution spike stems from how operators meet huge electricity needs: some are proposing onsite generation, and many developers and utilities are choosing gas engines or faster, less efficient gas turbines to speed buildout and avoid grid-connection delays. The modeling tested three demand scenarios and found emissions could be up to ten times lower if data centers pair grid power with onsite wind and solar, but would hit the worst-case highs if onsite gas is widely used. Texas already leads the nation in data center capacity (about 26 GW built or under construction) and, per market research, has roughly four times the proposed onsite-powered capacity of any other state, making its power choices pivotal for regional air quality.