Israeli researchers find that gray water is safe for household
use Health Ministry opposition nixes plan for household
recycling systems. Scientists from the Technion - Israel
Institute of Technology and Ben-Gurion University of the Negev
have proven the efficiency of gray water purification systems
and that people should be encouraged to use such water. The
project is one of the most comprehensive ever undertaken
anywhere in the world to study the re-use of gray water - water
that is generated in homes in laundry, dishwashing and bathing
and can be recycled to irrigate gardens. The study found that in
most cases the quality of the water stored after treatment was
very high. Among the categories checked were clarity, quantity
of solids and concentrations of bacteria, which dropped after
the addition of disinfectants, chlorine tablets and ultra-violet
light. An average household system supplies between 100 and 120
liters of water a day for irrigating the garden. The findings
have been presented to the Health M