ܩܐ
S. No. Com
Water table
The purest form of water
3.
Potable water
Chemical used in sedimentation during
purification of water
Spring water
(b)
(c)
(d)
(e)
kishte
Column II
Rainwater 2
Underground water
Surface water 7
Ground water 3
Contains salts of calcium sodium and
magnesium 6
Process of removal of germs
Water conservation
Sea water
Pollutant 10
Decrease in oxygen content 9
(g)
(h)
Fertilizers
Riverwater
Rainwater harvesting
Thermal pollution
Oil spill
Sterilization
(1)
1r.
Alum
Answers
Answer:
Drinking water supplies in the United States are among the safest in the world. However, even in the U.S., drinking water sources can become contaminated, causing sickness and disease from waterborne germs, such as Cryptosporidium, E. coli, Hepatitis A, Giardia intestinalis, and other pathogens.
Drinking water sources are subject to contamination and require appropriate treatment to remove disease-causing agents. Public drinking water systems use various methods of water treatment to provide safe drinking water for their communities. Today, the most common steps in water treatment used by community water systems (mainly surface water treatment) include:
Figure illustrating the water treatment cycle, showing coagulation, sedimentation, filtration, and disinfection