Honestly it depends on whats in the ground where the fraciing is occurring.
You cannot ignore the cases where the water people are drinking after fracking in the area, makes it undrinkable and puts enough combustible gasses as the result of fracking, that they can ignite it.
In these cases again, not the fracking fluid, but what underground trapped gas pockets the fracking releases into well supplies.
” combustible gasses as the result of fracking, “
They already had gas in their water. Naturally occurring.
Fracking dangers are hoaxes.