Data Center Freeze Impacts Seattle Utilities

Seattle officials are weighing a one-year moratorium on new data centers after city leaders said proposed projects could reshape electricity and water demand in a city served by publicly owned utilities. Councilmembers Debora Juarez and Eddie Lin and Council President Joy Hollingsworth announced the emergency legislation on April 30, saying it would pause new siting while the city studies effects on infrastructure, utility rates, land use, jobs and public health. Mayor Katie Wilson had said on April 18 that Seattle had not authorized or permitted any new data centers, but that the prospect of large projects had raised “intense public alarm.” Seattle City Light and Seattle Public Utilities are now developing policy and rate proposals that city leaders say are intended to keep residential and business customers from absorbing added costs. ### Which projects triggered the moratorium push? Four companies approached Seattle City Light about five large-scale data center proposals in Seattle, according to reports cited by city officials and local media. By mid-May, two of the five proposals had been withdrawn, GeekWire reported, but the debate continued because the original pipeline had already focused attention on utility demand and permitting. The five proposed projects would have had a combined maximum demand of 369 megawatts, according to city officials cited by GeekWire and KOMO. That is roughly one-third of Seattle’s average daily electricity use, a comparison that has become central to the city’s public discussion. ### What exactly would the moratorium do? The April 30 council announcement said the bill would create a 365-day ban on the siting of new data centers in Seattle. A companion resolution would direct the city to study impacts on infrastructure, water usage, utility rates, land use, jobs and public health, according to the council statement. Councilmember Eddie Lin, the prime sponsor of the moratorium bill, said in the council release that “mega data centers are popping up across the country” and driving up utility costs and pollution when not properly regulated. Hollingsworth said in the same release that the city needed to learn more about the “second-hand effects” of the facilities, including utility rates, before moving ahead. ### Why are Seattle utilities part of the fight? Seattle City Light is drafting a large-load policy for data centers so that infrastructure costs and added power purchasing costs are not borne by Seattle residents or other customers in its service area, Mayor Wilson’s office said on May 1. Seattle Public Utilities is working with City Light on national best-practice reviews and on proposals for rate structures and legislation, the mayor’s office said. The mayor’s office said those utility proposals are meant to ensure that “residents and businesses will not pay increased utility costs because of large-load data centers.” That language has made utility bills a focal point of the moratorium debate, even though no new large-scale project has been approved. ### How does water enter a debate that started with power demand? The council’s April 30 release specifically ordered study of water usage alongside electricity rates and public health. Data centers use water for cooling, and Mayor Wilson’s office said on May 1 that future state legislation should include standards for “sustainable water use.” KOMO reported that residents speaking at a May 20 committee meeting tied data centers to concerns about water consumption, especially after a statewide drought emergency declared in April. Public comments cited by KOMO and GeekWire also raised concerns about noise, diesel backup generators, pollution and neighborhoods near potential sites. ### What has happened at City Hall so far? Seattle’s Land Use and Sustainability Committee heard a briefing on Council Bill 121214 on May 20, according to Seattle Channel and the council agenda system. KOMO reported that neither the Land Use and Sustainability Committee nor the Parks and City Light Committee voted that day, but both took public comment. Mayor Katie Wilson said on May 1 that the executive branch was working with the council on the one-year moratorium and on longer-term regulation. Her office also said the city plans to seek state legislation in the 2027 session covering clean energy, air and noise pollution, water use and job quality for large-load data centers. ### What happens next for rates and rules? July 1 is the deadline cited by GeekWire for Seattle City Light and Seattle Public Utilities to examine electricity and water use and recommend policies to shield customers from cost increases. Oct. 30 is the deadline cited for utility rate-structure recommendations, while zoning and development work by the Seattle Department of Construction and Inspections extends into 2027. The next public record for the proposal is likely to come through Seattle City Council legislation and committee materials, where Council Bill 121214 and the companion resolution are being tracked. City officials have also said future work could include voluntary agreements with data center operators covering noise, heat, pollution, workforce protections, water and energy use, and community benefits.