What type of roof is safe to collect rain water?..To Drink.?

Question by zuma: What type of roof is safe to collect rain water?..To Drink.?
Asphault Shingles has asbestos, or lead, anti fungus agents?..Galvalume,...Galvanize is Safe?
Paint R -Panels is Lead Base Paint?.. or does it matter(lead base paint).
There is no Acid Rain where I live.
Algae,..Never hurt my ancestors/ gran parents,..i remember washing clean the cistern, twice a year.
Filter, no problem
Bullcr@p...If that were true my ancestors wouldn't have made into their 80's and 90's.
We

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