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From cloud to glass
Explore the journey of water below.
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Did you know there are five different types of clouds?
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RAIN WATER is part of the raw, natural water found in our environment. This includes groundwater and the water in our springs, rivers and lakes.
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This RAW water must be abstracted, and then treated to become SAFE drinking water.
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80% from rivers
& lakes -
20% from groundwater
& springs
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Raw water is SCREENED to remove large items like sticks, fish and leaves.
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The Ancient Greeks boiled and filtered their water through sand to purify it.
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The Egyptians discovered how to use coagulants. They even left pictures of their water treatment techniques on tomb walls.
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COAGULANT is added to the water to bind fine particles together. These larger, heavy particles are called FLOCS.
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Slow sand filters began to be used to treat public water supplies in early 19th century London.
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Sand and gravel FILTERS are used to remove the final particles.
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Disease carrying micro-organisms, which are too small for the eye to see, are killed during DISINFECTION.
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It took until the 1850s to prove the connection between water quality and disease.
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Today a modern water treatment plant can be run by as few as two people.
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After treatment and TESTING your drinking water is stored, ready to be piped to your home.
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How long does it take raw water to become drinking water in your taps?
