Here are several irrigation resource links specific to Washington, including licensing, certification, and additional relevant resources:

1. Washington State Department of Ecology – Water Resources Program:

2. Washington State University Extension – Irrigation:

3. Washington Association of Landscape Professionals (WALP):

4. Washington State Nursery & Landscape Association (WSNLA):

5. Washington State Department of Labor & Industries – Contractor Registration:

Please note that specific licensing, certification, and program availability may vary over time. It’s recommended to visit the respective websites and contact the relevant organizations or agencies for the most up-to-date information and resources related to irrigation in Washington.

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