Water water everywhere but ne'r a drop to drink.
I seems a bit obvious but water in Germany is not like the UK. Nor is the brewing industry. Aside from the big boys every town has it's own brewery or two and there are many pub brewers (this long before the advent of micro-breweries in the UK).
Sorry. The water. The flat part of Germany and most of Holland is on a sand bed. In many places water is taken from this top layer of sand and this is why you will find "Wassershutsgebeit" (water protection area) all over the place. There are severe penalties for spilling polluting materials in these zones. In places the sand lays over brown coal and carbon dioxide from the slow oxidation of this dissolves in the water making it acidic. This in turn dissolves other minerals into the water; so bad in places it will eat though copper pipe. In general the water quality is poor and tastes so bad that most people drink bottled water.
However fracking takes place at great depth so I do not see how fracking chemicals could get into the normal water supplies taken from shallow wells. There might be very small quantities of methane but in comparison to what is already in the water is this a problem?
There might be more of a problem with deeper wells but is this realistic. Wells are cut into porous deposits which will pass water. Shale is compressed clay (or the other way round?) and aside from any cracking in it does not easily pass water.; it is not the natural place you would put a water well. If the fracking increases the porosity of the shale does this matter? There should be no wells in the vicinity so I think the answer is no.
The question is whether there a problem with fracking, whilst there might be some local issues (there are always exceptions) there should be sufficient distance between the fracking and the water wells to safeguard supplies. The rest is hysteria.
Sorry for being serious for once.