How
our water is treated.
Boreholes
and wells
Water
taken from underground wells or boreholes is usually of high quality
as it has been naturally filtered during its journey through the soil
and rocks. At most sites a carefully controlled dose of chlorine gas
is all that is required to guard against bacteria. At some sites we
have to give the raw water a heavier dose of chlorine to kill off
any bacteria; afterwards we reduce the chlorine level before the water
goes into supply.
Springs
Water taken from the springs at Havant often contains some small
particles and therefore goes through a filtration process at our
Farlington Treatment Works to
remove them.
River
Water
The
river water by comparison is dirtier. It undergoes extensive treatment
which is carefully monitored. Chemicals are added which bind the small
pieces of debris in the water together. These form a blanket of sediment
in the settlement tanks and as the water passes through the blanket
so it removes further particles. Any remaining particles are removed
by a filtration process. Finally chlorine is added to ensure a safe
and wholesome water supply. This is done at our River
Itchen Treatment Works.
