We did find one private lab in Idaho Falls that is willing to test anyone's samples if you're worried about it. But that test will cost you $250 and
we were told it probably wouldn't show anything conclusive.
Every now and then you'd get what locals called a 'Salt Storm' and lines ranging from 4kv to 230kv would trip.
The salt can get pretty encrusted.
I used to keep my sailboat at a marina over the summer and the salt storms would leave salt stalactites and the like hanging from the rigging.
Looks like the same thing happened in the Salt Lake area.