I have a question for you. My wife and I have been considering gathering rainwater from our down spouts primarily for use in watering our garden, but I was also thinking about it as an alternate source of drinking water in an emergency. I know that water filtration systems can filter for bacteria and parasites, but are there any concerns about water coming off of a roof with composite shingles (not wood)? Are there chemicals in composite shingles we we need to worry about that could not be filtered out?
Yeah, me too: glad to have you here.
So, my understanding is that composite shingles leach petrochemicals into the rainwater, so it's sorta like drinking from the puddles in an asphalt parking lot - not so nice, possibly carcinogenic, but not acutely toxic.
My favorite filter is the Katadyne Hiker. Is there a comparable Berkey product that's better, cheaper, longer-lasting, tastes great, less filling, whatever?