We're gathering info and preparing to install a 55 gal rainwater barrel on one corner of our house. This forum re-sparked an old interest and lessons from the past. YOUR post now has me thinking....even though our runoff will be used to water the ducks and chickens, I might need to re-think because of asbestos or asphalt particles. I won;t need to "purify" the water for human consumption like you do, but now I wonder what else I'm missing.

By the way, Welcome tothe forum