[Greenbuilding] low flow shower heads
bergman at cyberg.com
Wed May 18 12:44:28 PDT 2011
I'm not sure that most US systems are combined.
(I believe it's mostly older cities.) But here in
NYC where it is indeed combined, any medium
rainfall results in the system becoming
overloaded and untreated sewage then has to be
dumped directly into local waterways. (like today!)
The fairly enlightened response by Mayor
Bloomberg's office -- in addition to building new
sewage treatment capacity -- is to emphasize
storm water retention in new construction and
begin to implement porous paving areas.
In terms of closed loop water supplies, while NYC
is definitely not, it has (as I think I've
mentioned here before) a remarkable upstate
supply shed that, if it isn't disrupted by
proposed fracking, should continue to provide us
with water that's cleaner and tastier than most bottled waters.
At 03:06 PM 5/18/2011, Jason Holstine wrote:
>Just google or wikipedia for stormwater and
>waste water treatment systems. There are
>separate and combined sewer outflow systemsmost
>US systems are the latter and are treacherous.
>Do the same for a simple Water Cycle 101
>introduction -- water is a more-or-less a global
>closed loop but where water comes from is
>definitely NOT the same place where its used
>and NOT the same where it ends up. California
>gets nearly all its water from Rocky and PNW
>mountains & glaciers for agricultural uses that
>run-off from the farms ultimately into the
>Pacific and/or urban treatment systems far from
>the H2Os use on the farm, let alone birthplace in the Rockies.
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