we use diverters for the first flush, if there is fact in that jet stream theory then if it floats down from 30 to 60 thousand feet and precisely contaminates where it is needed, keeping in mind ther are generally some pretty good winds up that high to blow the jet stream off its target course, then should any of this get past first flush diverters into the tank it might also just harmlesly settle to the bottom of the tank. where it would remain un agetated and not dissolved into the water. we have jets fly over at maximum height ceilings some days there is jet stream most days not, jet stream from teh engines and wings to me indicates teh presence of jet stream moisture in the meteorology observations, which if the sytems are there or coming could mean we get some rain, we like nearly all rural people don't filter our water and everyone seems to be healthy enough.
not that i don't think our corrupt gov's cn be trusted.
we usualy have one diverter for each 50sq/mts of roof catchment, 1 meter of 90mm pipe will trap app' 7 litres of water. 1mm of rain onto 1sq/mt of roof = 1 litre of water app'.
anyhow catch rain water and drink heartily.
With peace and brightest of blessings,
"Be Content With What You Have And
May You Find Serenity and Tranquillity In
A World That You May Not Understand."