The water was passed through the filter beds of all the
control units and experimental filter units. Then the filtrate
from all the units were analyzed separately for fluoride,
arsenic and coliform bacteria concentration at a duration
of 2, 4, 6, 8, 10 and 12 h of the filter run according to the
standard methods (APHA, 1989). The contribution of
crushed brick was also calculated for percent removal of
fluoride, arsenic and coliform bacteria under all the treat-
ment batches.