recognized from the earliest days and the importance of quality come to be recognized
gradually in the later days. The earliest recorded knowledge of water quality and its
treatment are found in Sanskrit literature “Sushuri Sanhita” compiled about 2000 B.C.
It deals with storage of drinking water in copper vessels, exposure to sunlight, filtering
through charcoal, sand etc. The correlation between water quality and incidence of
diseases was first established in 1849 by Dr. John snow when cholera appeared in
London during the summer and 14,600 deaths were reported. But Dr. snow unable to
convince the authorities and public with the evidence of available data. The water
borne diseases like typhoid, dysentery, cholera etc the concept of water borne diseases
was well accepted by 1900. Another striking example was reported from Uttarpradesh
by W.H.O (World Health Organisation) in 1963, there the death rate by chorera
decreased by 74.1%, Thyphoid fever by 63.6% , by dysentery 23.1% and diarria by
63.6%. All these were achieved by drinking water treatment.
NEED FOR PROTECTED WATER SUPPLY
Protected water supply means the supply of water that is treated to remove the
impurities and made safe to public health. Water may be polluted by physical and
bacterial agents. Water is also good carrier of disease causing germs. The causes of
outbreak of epidemics are traced to pollute water and poor sanitation hospital are
continued to be flooded with the sick due to ignorance about health continues to be
profound. However during the last few decades, improvements in the public health
protection by supplying safe water and sanitation to all the people in the developing
countries. In 1977, united nations declare to launch a movement known as “HEALTH
FOR ALL BY THE YEAR 2000 A.D.” India is also a signatory to that conference.
The working group appointed by the planning commission while suggesting strategies
for achieving the above goal emphasized that potable water from protected water
supply should be made available to the entire population. Pure and whole some water
is to be supplied to the community alone can bring down the morbidity rates At
present, only 16 percent of towns in our country are equipped with water supply
works serving about five percent of population of the whole of country. India has get
to make serious efforts to make the treated water available to the most of its
population so as to minimise the water borne diseases. Therefore protected water
supply is a SIN QUO NON of public health of a community.
The objectives of the community water supply system are
1. to provide whole some water to the consumers for drinking purpose.
2. to supply adequate quantity to meet at least the minimum needs of the individuals
3. to make adequate provisions for emergencies like fire fighting, festivals, meeting
4. to make provision for future demands due to increase in population, increase in
standard of living, storage and conveyance
5. to prevent pollution of water at source, storage and conveyance