Looks like you can join if you live/work/worship in Washington or Oregon. You're also eligible to join if you have "an immediate family member that lives in Oregon."
https://www.unitusccu.com/
Also looks like just having the checking account provides eligibility for the EQ FICO.
I'm going to guess that since they give a free EQ FICO, they use EQ to join. I checked the pulls DB and didn't see any entries.