Public data · Free to use
Washington Data Center Power Rules: Large-Load Tariffs and State Law
How Washington’s utilities and lawmakers handle data-center-sized power requests: 1 utility and 1 state measure, compiled from public filings, with a source on every entry.
Last checked October 22, 2026All states
Utilities
Washington utilities and their large-load rules.
Puget Sound Energy
WA · Non-RTO West · Puget Energy
No specific rule foundApr 2026No PSE large-load tariff found; Washington regulators opened a statewide inquiry in 2026 on how utilities should serve large loads like data centers.
Sources: Washington Utilities and Transportation Commission, UTC to host technical conference on large energy loads on April 27 (2026); Washington Utilities and Transportation Commission, Public invited to join UTC workshop on emerging large electric loads (2026)
State law and regulation
Washington laws and rulemakings.
in review · 2026-04
UTC large load inquiry, Docket UE-260162 (2026)
State regulators are studying rates, cost sharing and interconnection conditions for large loads, aiming for a policy statement; HB 2515 (20 MW+) died in 2026.
Washington Utilities and Transportation Commission (2026); Davis Wright Tremaine (2026)
What this can and can’t tell you
The rules are public. Whether your site can get power isn’t.
Anyone could pull these filings; we compile them so they’re easy to find. Terms change often, so confirm them with the utility or the commission docket before relying on them.
Going deeper: Data Center Site Selection in Washington State
This tracker · Public, free
- A utility’s published rules for large new loads
- The same answer for every site in that utility’s territory
- What the terms are if power is available
- Compiled from filings anyone can read
A BlackForge report · Site-specific
- Whether a specific parcel can actually be served, and roughly when
- Substation headroom and the realistic connection path
- Gas, water, fiber, buildable land and zoning, checked together
- Built and refreshed for your load, your timeline and your parcels
Cite this tracker
BlackForge Data Centers. "Washington data center power rules," Large-Load Power Tracker. Last checked October 22, 2026. https://www.blackforgedatacenters.com/data-center-power-tracker/washington
Free to reuse under CC BY 4.0 with credit.
Need the answer for a specific site in Washington?
Parcel-level screening and verification, built for your load and timeline.