Washington data centers and energy regulations: new and proposed rules

11 notices on data centers and energy from Washington since 1 October 2026: final rule, proposed rule and notice. Rules first, newest first, each with its dates and a link to the state register.

  1. Final rule

    Defines generation sources and electricity sourcing mechanisms for large load tracking purposes.

    Open in the state register

  2. Final rule

    Establishes electricity retail provider definitions and retail sales measurement for large commercial loads.

    Open in the state register

  3. Final rule

    Regulates electricity wheeled through state and centralized market operations affecting large loads.

    Open in the state register

  4. Proposed rule

    Establishes environmental benefits and harms definitions for proposed greenhouse gas regulation.

    Open in the state register

  5. Notice

    Defines covered entities, cost burden, and greenhouse gas emissions compliance obligations.

    Open in the state register

  6. Notice

    Defines external GHG trading programs and electricity system operators affecting large loads.

    Open in the state register

  7. Notice

    Establishes greenhouse gas emissions reporting requirements for multijurisdictional retail electricity providers.

    Open in the state register

  8. Notice

    Establishes reporting requirements for imported electricity and generation units in Washington state.

    Open in the state register

  9. Notice

    Requires meter data retention and emissions factor calculations for imported electricity tracking.

    Open in the state register

  10. Notice

    Requires retail providers to report retail sales and electrification of shipping ports and truck stops.

    Open in the state register

  11. Notice

    Specifies power claiming and asset-controlling supplier designation for electricity generating facilities.

    Open in the state register

Also in Washington

Data Centers and Energy rules in other states

About these Washington notices

Which Washington notices are listed?

Notices, proposed, emergency and final rules on data centers and energy printed in the Washington register since 1 October 2026, newest first. Each links to the page it was printed on.

Is any of this reviewed by a lawyer?

No. The one-line description of each notice is drafted by a model and is not attorney-reviewed. Read the register page before relying on it.

Every data centers and energy rule change, with its date

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