Council moves to curb AI data centers

Seattle City Council moved on June 9 to block new large data centers for a year while the city studies how the facilities could affect electricity demand, water use, utility rates and public health. The council voted unanimously to adopt an emergency moratorium and a companion resolution after weeks of public pressure over proposals for large computing sites in the city. The measures were backed by Councilmember Eddie Lin, Council President Joy Hollingsworth and Councilmember Debora Juarez, and Mayor Katie Wilson had already said in April that her administration was exploring a moratorium. The action puts Seattle among the U.S. cities taking a more restrictive approach to the physical infrastructure behind the AI boom. ### Which facilities does Seattle’s moratorium actually cover? Council Bill 121214 applies to data centers with power capacity above 20 megavolt-amperes and requiring uninterruptible power, according to the council’s June 9 release. The city described those sites as large facilities used primarily for storing and processing digital data, while drawing a distinction between those projects and smaller co-location facilities that support hospitals, universities, cancer research, 911 call centers and municipal operations. (council.seattle.gov) The April 30 announcement described the measure as a 365-day moratorium on the siting of new data centers in Seattle. The June 9 release said the moratorium could be extended by six months if needed while the city completes its review. ### Why did council members say they wanted a pause? Eddie Lin said on April 30 that “mega data centers” were driving up utility costs for residents and small businesses and increasing air, water and noise pollution when not properly regulated. (council.seattle.gov) Lin, the prime sponsor of the moratorium legislation, said thousands of Seattle residents had objected and that the city should not subsidize “record profits” for tech corporations pursuing large AI data centers. (council.seattle.gov) Debora Juarez said on June 9 that the moratorium “does not stop AI or data centers” but pauses development while the city examines longer-term effects on “people and land.” Joy Hollingsworth said the council was “doing our homework” before making decisions that could affect infrastructure, utility rates, water use and the city’s sustainability goals. (council.seattle.gov) Mayor Katie Wilson said on April 18 that Seattle had not authorized or permitted any new data centers, but that the prospect of “massive new data centers” had raised “intense public alarm.” Wilson said she shared concerns about environmental justice, economic resilience and higher costs for Seattle ratepayers. ### What does the companion resolution tell the city to study? Resolution 32204 commits Seattle to studying how data centers could affect electrical grid capacity and reliability, water usage, utility rates, land use and development, jobs, the economy and public health. (council.seattle.gov) The resolution also requests engagement from the executive branch as the city develops data-center policies and possible legislation. (wilson.seattle.gov) The June 9 council release said the resolution directs city departments and the mayor’s office to analyze the effects of “high-density computing facilities” on the electrical grid, water use, utility rates, land use, local jobs and public health. That framework was sponsored by Juarez, who chairs the Parks and City Light Committee. (seattle.legistar.com) ### What had the mayor’s office already put in motion? Katie Wilson’s office said on May 1 that Seattle City Light was finalizing a large-load policy for data centers so that infrastructure and additional power-purchasing costs would not be borne by Seattle residents or customers in other areas served by the utility. The mayor’s office also said Seattle City Light and Seattle Public Utilities were surveying national practices and would propose rate structures and legislation in the following months. (council.seattle.gov) The same May 1 statement said the city would prepare an economic-impact report and push for state legislation in the 2027 session covering clean energy, air and noise pollution, sustainable water use and job quality for large-load data centers. ### What happens next in Seattle’s process? The legislative record for Resolution 32204 shows Mayor Wilson signed the measure on June 12, 2026, three days after the council vote. (wilson.seattle.gov) The resolution’s text says the city anticipates related legislative action after the studies are completed. Seattle’s next steps now run through city departments, Seattle City Light, Seattle Public Utilities and the mayor’s office, which the May 1 statement said would develop rate proposals, an economic-impact report and additional policy options. (wilson.seattle.gov) The city also said it plans to pursue state legislation in the 2027 Washington legislative session. (seattle.legistar.com)