Graded Light and tightening. 8 laws, orders, rulings and local actions, each with its source, reviewed 23 October 2026.
SB 5982 (effective June 11, 2026) binds large customers to clean energy deadlines; Avista paused a 500 MW project June 12, 2026 but no study rule exists.
No large-load tariff is in force; HB 2515 died in the Senate in March 2026 and the UTC policy statement (UE-260162) is still pending.
Nine temporary moratoria as of August 2026, including Seattle, Spokane and Moses Lake, cover several main markets while Quincy stays open.
SB 6231 (effective July 1, 2026) narrowed the sales tax exemption by excluding replacement servers and refurbished facilities.
No water, air or disclosure rule is in force.
Scored on rules in force, 1 to 5. 5 is the most regulated. Pending rules set the arrow.
Washington kept its sales tax exemption for new data centers but, from 1 July 2026, ended it for replacement servers and refurbished facilities (SB 6231). A second 2026 law (SB 5982) confirms that large customers must meet the same clean energy deadlines as utilities. The broader bill to make utilities adopt cost and curtailment tariffs for loads over 20 MW (HB 2515) passed the House and died in the Senate. The Utilities and Transportation Commission is writing a policy statement on large loads at investor-owned utilities, and Seattle, Spokane and at least seven other local governments have passed temporary moratoria.
The UTC said in a 13 October 2026 notice that it expects to publish a draft Policy and Interpretive Statement on large-load customers in docket UE-260162 in early November 2026, take comments through late November, and publish the final statement by the end of 2026. The governor's data center workgroup had not published its final report as of 23 October 2026, and a revived version of HB 2515 is expected in the 2027 session. The nine local moratoria in place as of August 2026 stand, and Avista's talks on a 500 MW Spokane-area data center remain paused.
No statewide moratorium, but 1 local pause is in force as of 23 October 2026, in Seattle, Spokane and others. Proposals and expired pauses are not counted.
Tightening. Washington is graded Light, which means incentives in place and few new obligations. Tax break trimmed, regulator writing large-load policy, local moratoria spreading. The outlook above says what is pending.
Washington sits in The West outside California. The grid operator decides how a new large load is studied, what it must bring or pay, and whether it can be curtailed first; the state decides siting, permits, tariffs and incentives.
Yes. Washington has paused, narrowed or ended a data center incentive in 2025 or 2026: SB 6231: sales tax exemption cut back.
On Genloop's five-line rubric (1 least regulated, 5 most) Washington scores grid connection 2, power rates 1, siting and land use 3, tax treatment 3, permits and water 1, a mean of 2.0. The most regulated line is tax treatment: SB 6231 (effective July 1, 2026) narrowed the sales tax exemption by excluding replacement servers and refurbished facilities.
8 items: each is a law, order, tariff, ruling, utility action or local decision that changes what a data center must do, pay or disclose, or where it may be built. Failed and pending measures are marked. Each links to its source.
Docket opened 16 March 2026 to set expectations for large-load interconnections, rates and contracts at investor-owned utilities, with workshops on 27 April and 12 August 2026 and written comments from utilities, tech companies, tribes and advocates in August and September. Options discussed include curtailment during shortages, surcharges, longer contracts, upfront payments and exit fees. A 13 October 2026 notice says the commission expects to publish a draft Policy and Interpretive Statement in early November 2026, take comments through late November, and publish the final statement by the end of 2026.
Source: apiproxy.utc.wa.govOn 13 October 2026 the Utilities and Transportation Commission issued a notice in docket UE-260162 saying it expects to publish a draft Policy and Interpretive Statement on electric large-load customers in early November 2026, request comments by late November, and publish the final statement by the end of 2026, with no further written questions planned.
Source: apiproxy.utc.wa.govAs of August 2026 Seattle, Spokane, Renton, Burien, Federal Way, Marysville, Moses Lake, and Skagit and Snohomish counties had passed temporary moratoria on large data centers.
Source: yakimaherald.comOn 12 June 2026 Avista paused negotiations with an unnamed developer over a 500 MW data center after community objections. Spokane's council first delayed and later passed a moratorium on large data centers.
Source: spokesman.comESSB 6231 was signed 1 April 2026 (Chapter 266, Laws of 2026) and took effect 11 June 2026. From 1 July 2026 replacement server equipment and data centers refurbished on or after that date no longer qualify for the sales and use tax exemption, and refurbishment-based exemption certificates expire; new construction and the first installation of servers still qualify.
Source: leyton.comSigned 24 March 2026 (Chapter 181, Laws of 2026), effective 11 June 2026. Clarifies that large customers, including data centers served as market customers of consumer-owned utilities and port districts, must meet the same Clean Energy Transformation Act deadlines as utilities, with the UTC setting reporting rules.
Source: app.leg.wa.govWould have required utilities serving data centers over 20 MW to file tariffs preventing cost shifts and setting curtailment rules for energy emergencies. It passed the House 51-41 in 2026 and died in the Senate.
Source: dwt.comGovernor Ferguson's order had the Department of Revenue convene a workgroup of agencies, utilities, labor, environmental groups and industry. Its preliminary report of 1 December 2025 shaped HB 2515 and recommended that state clean energy and carbon laws cover fossil or unspecified power used by data centers; a final report is due later in 2026.
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