Chlorine-alternative pool near So. Snohomish Co?

[Lovin' It]

I have recently relocated from OR and am having trouble locating a public pool that is chlorine-free or reduced chlorine (like saltwater). Our apartment uses a natural alternative, but the pool is only open seasonally. :( We're looking for an indoor pool for the winter. I suppose I could travel into Seattle if necessary, but would prefer to stay local.

Any suggestions?