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permaculture - [permaculture] rainwater and potability in large cities

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  • From: Guilherme Neves Castagna <guilherme@permacultura.org.br>
  • To: permaculture@lists.ibiblio.org
  • Subject: [permaculture] rainwater and potability in large cities
  • Date: Tue, 03 Jun 2008 19:56:54 -0300

Saludos ermanos,

Jody T put up a question on whether rainwater could be safely used for drinking, and more. Question that comes up to my mind is, suppose I'm in Tokyo, New York, Mexico City, or Sao Paulo (cities with over 10million ppl), what will the rainwater drops collect along the way that will turn it inadequate to human consumption (other than the drop in pH)? Heavy metals, sulphur dioxide, what else? Has anyone tested rainwater for potability in similar situations? Can I eventually turn it potable through the use of reed beds, sand filters, and the like? Some friends of mine live in Sao Paulo (Brazil) and are devising alternatives to the impending failure on the public water distribution systems, and rainwater is their only option.

I sincerely appreciate your comments on this topic...

Cheers!

--
Gui Castagna - Design Ecológico
fone/fax: +55 (12) 3832-1476
celular: +55 (12) 9702-9203
Ubatuba/SP
Brasil

Web: www.livrariatapioca.net +
www.permear.org.br
Skype: guilherme.castagna





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