Application for efficient use of potable water in Chemistry

1. NAME:SANTHAPURI
VINEELA
ROLL.NO:22951A62B6
BRANCH:CSE(CYBER
SECURITY)
SUBJECT:CHEMISTRY
TOPIC:POTABL
E WATER

2. What is Potable Water?
Potable water is the water which is fit for human consumption
and drinking purposes.

3. Why is it
called
potable
water?
• Potable comes from the Latin potare,
meaning "to drink."
• The Romans came up with the word and
built some of the world's first aqueducts,
above-ground channels that brought potable
water from the mountains to the cities.

4. What does
potable
water
contain?
Water that is safe for humans to
drink is called potable water.
Potable water is not pure water
because it almost always
contains dissolved impurities.
For water to be potable, it must
have sufficiently low levels of
dissolved salts and microbes .

5. Characteristics of Potable Water:
• Potable water should be colourless and odourless.
• It should be transparent.
• It should be free from impurities such as suspended solids.
• It should contain some minerals and salts, necessary for our body
and some dissolved gases to add taste.
• It should be free from harmful microorganisms.

6. Main
sources of
potable
water
• Surface water(like,a lake,river or reservior)
• Ground water(like,a aquifier)
• Recycled water(also called reused water)

7. Sources and methods of purification of potable water:
There are several methods used in the water
purification process, which include
• Physical processes, such as Filteration, sedimentation,
or distillation
• Biological processes, such as sand filter, active carbon
• Chemical processes, such as flocculation, chlorination,
the use of ultraviolet light.

8. Uses of
potable water:
• Potable water, also
called drinking or tap
water, is used for
sanitary purposes such
as drinking fountains,
showers, tiolets, hand-
wash basins,cooking,
etc.

9. Basic steps of potable water
treatment
• Public water systems often use a series of water treatment steps
that include, coagulation, flocculation, sedimentation, filteration,
and disinfection.

10. Important requirements of potable water
 The cleanest sources of surface water and groundwater must be
preserved for potable water supply purposes (Schwartz et al., 1990).
 Potable water must meet numerous physical, chemical,
microbiological, and radionuclide (q.v.) standards for both the
untreated (raw) water sources and the treated water.

11. Examples
• Pipe-borne water
• Protected well
• Borehole
• Protected Spring water
• Rainwater