I'm near the beach in OC. Didn't ride all last week due to the smoke. My gauge is the amount of ash on my car's windshield. This past weekend it was almost non-existent so did 25 miles on Saturday and Sunday mornings, 15 miles this morning before work. No issues noted after those rides. The sunlight is still a little yellow (hi-altitude ash?) but I'm good with the situation right now.