Seattle’s City Council has unanimously approved a one-year moratorium on constructing new large AI data centers. Mayor Katie Wilson is expected to sign it soon, after residents raised concerns about electricity strain, water use, and noise.
For months, Seattle residents have been looking at the same set of questions—how much electricity can the city handle, where will the water go, and what happens to neighborhoods as large data centers rise.
On Tuesday, the City Council took one concrete step toward an answer. It unanimously approved a moratorium on building new large AI data centers for one year. Mayor Katie Wilson has yet to sign the measure, but she was reportedly looking forward to doing so.
Wilson had been vocal about supporting a ban after the Seattle Times reported in April that five large data center project proposals in Seattle could consume up to a third of the city’s current electricity demand. The pressure didn’t stop at power. Residents also raised concerns about the centers’ potential water usage and noise pollution—issues that don’t fit neatly into a planning spreadsheet. especially for communities living near where new facilities would land.
Seattle’s tech footprint adds another layer to the debate. The city’s greater metropolitan area is home to Microsoft, while Amazon’s headquarters is in Seattle itself. Google and Meta have offices in the city as well. But as GeekWire notes. those tech giants don’t actually operate data centers inside Seattle. meaning the moratorium will mostly land on developers and providers rather than on the companies people associate with AI.
The moratorium would temporarily block development of large data centers that use more than 20 megavolt-amperes of energy—enough capacity to power thousands of homes. The city’s plan also leaves a path for extending the restriction: the moratorium could be extended for six more months.
Alongside the temporary ban, the council approved a bill that would require Seattle to study the impacts of AI data centers on the city’s electricity and water usage, utility rates, land use, local jobs, and public health. That information is meant to feed whatever permanent regulations come next.
City officials also drew a line meant to reduce ambiguity. One council member added an amendment that differentiates “traditional data centers” from AI “hyperscale” facilities. Once Wilson signs the moratorium. Seattle would join a growing list of cities and counties that have adopted either temporary or permanent bans on new data centers. including Denver. New Orleans. and Minneapolis.
At the most recent council meeting, more than 50 people testified. Members of the Amazon Employees for Climate Justice were among those urging the council to build renewable energy requirements and labor protections into the city’s regulations. They also reportedly called on government to stop what they described as the industry’s push “to build out as much compute capacity as they can. as fast as they can. before regulations can catch up.”.
The timing is now the central question. The council has already voted, and Wilson is expected to sign the moratorium soon. For Seattle. the decision will determine whether the city pauses large AI data center expansion while it gathers numbers—or whether the development pipeline keeps moving ahead of rules meant to catch up.
Seattle City Council moratorium AI data centers hyperscale Katie Wilson electricity water usage noise pollution renewable energy requirements utility rates public health Denver New Orleans Minneapolis