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*Dated: **07-06-2023**CEO KW&SB Engineer Syed Sallahuddin Ahmed is meeting with PP leader and former federal minister Dr. Muhammad Asim Hussain.**27-04-2023 *****COO Water Board Engineer Asadullah Khan, Syed Imran Zaidi, Muhammad Saqib, Sajid Nizam and other officers and employees of Water Board participated in the opening ceremony*****On the occasion of the opening ceremony, CEO Water Board and COO Water Board unfurled the flag and prayed for the development of the beloved country of Pakistan.*****Inshallah, the additional revenue that will come to the water board will be spent only on the improvement of the employees. COO Water Board Engineer Asadullah Khan****Providing better medical facilities and healthy environment to the employees is one of our top priorities. CEO Water Board Engineer Syed Salahuddin Ahmed****Health cards will also be given to the employees so that they can get better facilities for timely treatment. CEO Water Board Engineer Syed Salahuddin*****All officers and employees of the Water Board are standing together. Engineer Syed Salahuddin Ahmed***** ***Strict legal action will be taken against all the accused involved in the theft to bring them to justice. CEO Water Board********* *******The Water Board is working well under the supervision of CEO/MD Water Board Engineer Syed Salahuddin Ahmed and COO Water Board Engineer Asadullah Khan. Sindh Local Government Minister ******Constomer Services Center Lower Block A Ninth Mile Karsaz Shahrah Faisal Lal Qila Restaurant Karachi Phone:-021-99245138-43 Fax 021-99245190 Whatup:0319-2046357 *************** r**

History Of Water

DO YOU KNOW THE STORY OF DRINKING WATER

The Egyptians were the first people to record methods for treating water. These records date back more than 1,500 years to 400 A.D. They indicate that the most common ways of cleaning water were by boiling it over a fire, heating it in the sun, or by dipping a heated piece of iron into it. Filtering boiling water through sand and gravel and then allowing it to cool was another common treatment method.

Water treatment is much more complex today and is discussed a bit later in this Web site.

About 70% of the earth’s surface is covered with water.

Ninety-seven percent of the water on the earth is salt water. Salt water is filled with salt and other minerals, and humans cannot drink this water. Although the salt can be removed, it is a difficult and expensive process. Two percent of the water on earth is glacier ice at the North and South Poles. This ice is fresh water and could be melted; however, it is too far away from where people live to be usable.

Less than 1% of all the water on earth is fresh water that we can actually use. We use this small amount of water for drinking, transportation, heating and cooling, industry, and many other purposes.

Everything is made of atoms. An atom is the smallest particle of an element, like oxygen or hydrogen. Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That’s why water is sometimes referred to as H2O. A single drop of water contains billions of water molecules.

Pure water is tasteless, odorless, and colorless. Water can occur in three states: solid (ice), liquid, or gas (vapor).

Solid water—ice is frozen water. When water freezes, its molecules move farther apart, making ice less dense than water. This means that ice will be lighter than the same volume of water, and so ice will float in water. Water freezes at 0° Celsius, 32° Fahrenheit.Liquid water is wet and fluid. This is the form of water with which we are most familiar. We use liquid water in many ways, including washing and drinking.

Water as a gas—vapor is always present in the air around us. You cannot see it. When you boil water, the water changes from a liquid to a gas or water vapor. As some of the water vapor cools, we see it as a small cloud called steam. This cloud of steam is a miniversion of the clouds we see in the sky. At sea level, steam is formed at 100° Celsius, 212° Fahrenheit.The water vapor attaches to small bits of dust in the air. It forms raindrops in warm temperatures. In cold temperatures, it freezes and forms snow or hail.

The water cycle or hydrologic is a continuous cycle where water evaporates, travels into the air and becomes part of a cloud, falls down to earth as precipitation, and then evaporates again. This repeats again and again in a never-ending cycle. Water keeps moving and changing from a solid to a liquid to a gas, over and over again.

Precipitation creates runoff that travels over the ground surface and helps to fill lakes and rivers. It also percolates or moves downward through openings in the soil to replenish aquifers under the ground. Some places receive more precipitation than others do. These areas are usually close to oceans or large bodies of water that allow more water to evaporate and form clouds. Other areas receive less precipitation. Often these areas are far from water or near mountains. As clouds move up and over mountains, the water vapor condenses to form precipitation and freezes. Snow falls on the peaks.

Water treatment is the process of cleaning water. Treatment makes the water safe for people to drink. Because water is a good solvent, it picks up all sorts of natural pollutants. In nature, water is not always clean enough for people to drink. When the microscope was invented in the 1850s, germs could be seen in water for the first time. In 1902, Belgium was the first country to use chlorine to clean or treat water in a public water supply. Today, almost every city in the world treats their drinking water. Treatment includes disinfection with chlorine or other chemicals to kill any germs in the water.