The water that comes out of the
tap in about 95% of the homes and businesses in Vilnius is extracted
from underground aquifers that underlay the city. This water is
extracted by wells at some 19 well fields or waterworks throughout
the city (See Picture). At each of these
waterworks there are between 4 and 27 separate wells. Currently,
there are 268 active wells which on average yielded 152,000 cubic
meters of drinking water per day to consumers in Vilnius. These
wells penetrate anywhere from about 40 to 200 meters into the
ground and tap into a variety of geologic formations. These geologic
formations are porous and contain spaces. Within these spaces
is where the water lies.
To extract the water, a hole is drilled into the rock and a steel
or plastic casing is placed inside the hole. Then a pump is placed
inside the casing to push the water up to the ground surface.
Since after pumping the water level in the well will be lower
than that in the surrounding substrate, the water will flow to
the well to replenish it (See Picture).
This water will then often be treated at each of the waterworks
to increase its suitability for consumption by people. Common
processes often involve the addition of chlorine which disinfects
the water from most bacteriological live forms that would prove
dangerous for humans.
After treatment the water is pumped through an extensive network
of distribution systems that lie underneath Vilnius. These distribution
systems pump the water into your apartment or business where it
comes out of the faucet, shower, or toilet.
Source: Vilniaus Miesto Vandenvieciu Eksploatacijos Ir Vandens
Tiekimo Sistemos Optimizacija, Vilnius, 1998.
Fact Sheets/Faktu suvestines:
apie geriamą vandenį Vilniuje:
Vilnius Drinking Water
informacijos apie geriamą ir požeminį vandenį:
Other Information about Drinking Water and Groundwater: