I have lived in Oregon and Washington State for the past 20 years and have suffered with terrible allergies and eventually developed asthma. I am allergic to many things, but mostly grasses, mold, and pollen.
I moved to the California high desert last June and the difference has been amazing! I have not had to use Beconase for the first time in 15 years, or my inhaler since I've moved. The desert did get a lot of unusual rain this year, so I have a little bit of allergies with the wildflowers blooming this last month. I have popped a Clairiten a couple times, but nothing even close to what I'm used to.
A move worked for me. Just my 2 cents........