A lot of factors go into the resources that the PUD purchases to serve its customers, such as cost, reliability, availability, environmental impacts, sustainability, and risks. This page includes more information about the PUD’s resources and power planning.
Washington State Fast Facts
Clean Energy Transformation Act (CETA) was signed into law on May 7, 2019, by former Governor Jay Inslee. CETA sets Washington on a path to clean electricity, requiring utilities to serve coal-free electricity by the end of 2025, carbon-neutral electricity by 2030, and 100% clean electricity by 2045. Along with these clean energy mandates, the landmark law imposes planning and reporting requirements as well. Find more information on Commerce’s website about CETA.
Utility Fuel Mix Report for 2024
Fuel Mix Disclosure - Washington State Department of Commerce
Every year, Washington State reports on the source of electricity for customers throughout the state. The "Fuel Mix Report" shows that PUD 3's electricity is 100% Carbon-Free.
| Type of Fuel | Percentage |
|---|---|
| Coal | 0.00% |
| Hydroelectric | 73.86% |
| Natural Gas | 0.00% |
| Nuclear | 12.50% |
| Petroleum | 0.00% |
| Solar | 1.48% |
| Unspecified* | 0.00% |
| Wind | 12.16% |
| Total | 100% |
| Renewable & non-emitting | 100% |
Source: Data for the report comes from the Washington State Department of Commerce’s “Washington State Electric Utility Fuel Mix Disclosure Reports for Calendar Year 2024”.
* Mason PUD 3’s unspecified resources come solely from the Bonneville Power Administration’s resource mix which stems from its purchases made on the market to balance resource needs with load. The fluctuations in the amount of unspecified is due to many factors including the rain or snowpack supplied and timing of the spring melt.
2025 Clean Energy Implementation Plan (CEIP)
View the Approved 2025 CEIP, which will guide how we continue delivering safe, reliable, economical, and sustainable energy from 2026 through 2029, while advancing the goals of Washington’s Clean Energy Transformation Act (CETA).
We’re proud that most of the power we provide is already clean [see the Resources (Fuel Mix) tab]. Our clean energy work builds on a strong foundation with a thoughtful, transparent approach to exploring new clean energy resources—while keeping affordability, reliability, and community needs at the heart of every decision.
CETA requires electric utilities to prepare a CEIP every four years and it must:
- Propose interim targets for meeting CETA’s standards for greenhouse gas neutral electricity in 2030 and clean energy in 2045
- Identify specific targets for energy efficiency, demand response, and renewable energy
- Identify specific actions for meeting the interim targets and specific actions described above
- Ensure that all customers benefit from the transition to clean energy
Further requirements for the development of CEIPs are specified in Washington’s RCW 19.405.060 and Chapter 194-40 of the Washington Administrative Code.
Mason PUD 3 Resource Plan 2026
The Resource Plan has been updated in accordance with the Washington State Utility Resource Plan law, 19.280 RCW. The plan shows how Mason PUD 3 plans to match its resources to forecasted load requirements.