Mysterious water source?

My house stays humid despite me running no water in the house. I have dried every inch of it with blow dryers and have 3 70 pint dehumidifires running which get about 10 -15 gallons of water. There is no plumbing leak because I had it tested by a leak detection company. Outside ground is dry I am having to deal with mold growth. would love to find the source of water Any help is welcome. I meant three dehumidifiers ( 70 Pint ) capacity running 24 hrs I meant three dehumidifiers ( 70 Pint ) capacity running 24 hrs No I don't have a crawl space and foundation is concrete I am really surprised at the water amount collected by dehumidifiers What I am wondering is if there could be a fungus with roots somewhere else and growing in my house and bringing moisture with it since it has to survive