Although Hana, Hawaii on the island of Maui is closest to the source I would say the answer to the question is relative to the wind. read more
If there is a lot of volcanic activity on the Big Island sending a lot of vog to Maui on a given day, and the trade winds are calm or nonexistent on that day, then you will hear people complain about vog symptoms like coughing, runny nose, etc. read more
Re: Vog and Maui Aug 27, 2012, 3:09 PM to add to msfuzz, yes, South Kihei/Wailea definitely gets much less smoke/ash from sugar cane field burning than North Kihei/Maalaea area. read more
If vog and allergies concern you, Waikoloa might be a good place to settle. It's dry there, so there is less pollen and mold spores, and it has way less vog than Kailua, because the wind blows in a different direction there, and keeps the vog offshore. Also, Waikoloa has an award winning grammar school and is closer to all the best beaches. read more