Data Centers in Virginia: A Hidden Health Cost

Virginia hosts the world’s biggest cluster of data centers, a stretch known as “Data Center Alley. ” The region grew because it sits close to Washington, D. C. , offers cheap land, and has long‑standing tax breaks. Today, most of these facilities are in Loudoun, Prince William and Fairfax counties, and the footprint is expected to double. The power that keeps these centers humming is enormous—about 5, 050 megawatts in total. That amount could light half of Virginia’s homes. Yet most of the state’s electricity comes from fossil fuels: 54 % natural gas and 4 % coal. The combustion needed to run data centers releases pollutants that harm lungs, hearts and brains. Children can suffer from ADHD or autism; older adults face Parkinson’s or Alzheimer’s. Virginia imports a lot of power, especially from coal‑heavy neighbors. The smoke that travels across state lines adds to local air quality problems. Backup diesel generators, over 4, 000 in number, operate thousands of hours each year and emit chemicals linked to breathing issues and neurological damage.Water use is another concern. In 2023, data centers in Northern Virginia drew nearly 2 billion gallons—up 63 % since 2019. This pressure on rivers and groundwater is serious in a state that has seen many dry years. Cooling water discharged back into the environment can spread bacteria, causing stomach problems, skin rashes and even affecting birth outcomes. Noise is a quieter threat. The constant hum from cooling fans near homes and schools can disturb sleep, raise heart rates and impair children’s learning. Rising electricity demand also pushes up energy bills, hitting low‑income families hardest. These health risks can be mitigated. Requiring data centers to use renewable power, setting strict water limits during droughts, mandating noise‑reduction designs and choosing sites on already industrial land are practical steps. Utilities should charge data centers for the true cost of their grid load so that household rates stay fair. Public health experts must share this information with voters and lawmakers to guide smart policy. Virginia will likely keep hosting data centers for the foreseeable future, but residents and leaders need to weigh all consequences—especially how these facilities affect everyone’s health. The debate isn’t just about technology; it’s also about clean air, safe water, quiet neighborhoods and affordable energy.