Basic Documentation

A water use study, published in 2002, showed that
hospitals typically have the following broad
breakdown of water use as shown in Figure 3.
6
Figure 3. Water Usage in Healthcare Facilities.
Rain Water Usage
The GGHC, WE1 requires using captured rainwater,
recycled water, recycled greywater for non-potable
uses for irrigation. Rainwater systems have
significantly fewer code requirements than greywater
systems. Using rainwater reduces the load on
municipal water utilities. The system may be as
simple as a collecting tank that uses gravity to
irrigate landscaping. or a rainwater collection system
that include specific functions such as automatic
pumping, water treatment and performance
monitoring. Pre-engineered rainwater catchment
systems are beginning to emerge, saving designers
from reinventing the entire package.
Figure 4 illustrates a typical design. Rainwater i
s
collected from the roof gutters and flows down to a
cistern for storage. In addition to straining and
filtering, treatment may include ultraviolet irradiation
or chemical disinfection. Even for non-potable
applications, it’s important to prevent biological
growth in the tank.
6. Water Conservation, PracticeGreenhealth.org Web article at:
http://cms.h2e-online.org/ee/facilities/waterconserve/
Siemens Industry, Inc. Page 3 of 12
Document No. 1
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