Seattle Mayor Katie Wilson announced on Saturday, April 18, 2026, that her administration is exploring a moratorium on the construction of new data centers within city limits. The move comes in response to growing concerns regarding the impact of high-capacity computing facilities on the city's electrical grid, utility rates, and environmental goals.
In a statement released via social media and confirmed by the Mayor’s Office, Wilson cited environmental justice, economic resilience, and potential increased costs for Seattle ratepayers as primary drivers for the proposed pause. The Mayor indicated that her team is working with Seattle City Light and the City Council to identify long-term policy approaches for siting such facilities.
The announcement follows an April 10 report by the Seattle Times revealing that four companies have approached the municipal utility, Seattle City Light, regarding the development of five large-scale data centers. These proposed facilities would have a combined peak demand of 369 megawatts. According to utility data, this amount of power is equivalent to approximately one-third of Seattle’s average daily electricity consumption.
While Seattle currently hosts approximately 30 data centers, existing facilities are relatively small. The new proposals represent a significant shift in scale; if built, these hyperscale centers would consume nearly ten times more power than the city’s existing data center inventory at full capacity. The surge in demand is largely attributed to the expansion of artificial intelligence infrastructure by major technology firms.
Public opposition to the projects has intensified over the past week. Local advocacy groups, including 350 Seattle and a community organization known as the Troublemakers, launched a coordinated campaign that resulted in more than 54,000 letters being sent to the Mayor and City Council as of Saturday. Activists have expressed concern that the massive energy requirements could strain regional hydropower resources, which have already been impacted by recent drought conditions.
In response to the influx of proposals, Seattle City Light has begun rewriting contract terms for large-load customers. The utility plans to implement requirements that would force data center operators to secure their own power generation and fund necessary infrastructure upgrades. This policy shift is intended to prevent the costs of grid expansion from being passed on to residential and small business ratepayers.
City Councilmembers Alexis Mercedes Rinck and Eddie Lin have also signaled support for investigating a moratorium. As of April 18, no permits for the proposed data centers have been authorized. The companies involved in the inquiries have not been publicly identified due to nondisclosure agreements, though they are expected to decide whether to formally apply for service within the next two to three months.