fog harvesting rainwater --- salt?

I live near the ocean on what you might call a mini homestead. We have fruit tress, large vegetable garden, homemade composting area, flowers, citrus... We have lots of fog in summer, and rainy winter/spring. I was researching rainwater harvesting techniques and came across something that would change the game for us in the summer since we get almost no rain, but lots of fog. Basically what they do is use some sort of mesh to harvest the water that's contained in the fog. I am curious if there is any salt in the fog, since we are near the ocean. Wouldn't it be nice to harvest rainwater and make salt at home? Please leave in the comments what you think about this idea. I might be a little optimistic.

I  just want to encourage you to try and learn.  
We get enough dew  and fog at various times to have water dripping into the rain barrels from the roof of our greenhouse.

Taste some of the dew collected from the fog. That will tell you instantly how salty it is or isn't.