How likely are natural springs to contain the novel life forms in water that are beneficial to well-being?

These are very likely to contain these novel life forms and that is because they represent a flow of water, so this is water simply filtering through the Earth for a time that has not remained stagnant for extensive periods and being only reached quite a long time later by wells being dug and tapping into an underground reserve. This exchange and much briefer rate of passing through the Earth for a time will allow the life forms to persist, in most cases, as all the required ingredients are still present in sufficient concentrations and the energies will be supportive as well because of the many life forms that exist underground also. In other words, it is a friendly environment, quite welcoming, and will not be causing deprivation severe enough to impair the functioning of these beings.