Old solder used to be a mix of tin and lead...
newer solder is an alloy mix of aluminium copper and silicone....
flux used in plumbing joints depending on the brand uses Hydrochloric acid Amonium salts and zinc......
once used a few times the flux will "wash out" as all are generally water soluble....
if your home is pre 1987 chances are any plumbing using yorkshire fittings will be lead and flux soldered.... this is when the WRAS regs were amended banning lead based products be it pipe or solder in domestic hot and cold water supplies...
As for the aluminium comment i made was genuine in regards to modern gas/ refrigerant free peltier based units where the accumulator / heat exchanger is often anodised aluminium...
likewise i suppose the plastics used in the construction of the water collector are not bisphenol A free..... which have been used since the 1950s in plastic drinks bottles only recently has the EEC banned them from use in baby bottles.... no ban on adult drinking bottles yet.........
and in a SHTF situation solar stills using plastic sheeting is likely to be a greater risk of BPA consumption or decanting into plastic water bottles...
Microbial contamination is always a risk with open water collection......
there are far more nasties in every day life which going back 20 years the air in most town centers would have been full of lead from Leaded petrol . Asbestos from brake pads, Endocrine disruptive agents such as PCB's were common too
That all said id rather drink the dehumidifire water than out of a ditch or river as they are going to be laced with Agricides, slurry and human waste
this book is well worth a read imo
http://www.amazon.co.uk/Our-Stolen-Futu ... 0452274141