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Water may be purified or treated at one or many points in the supply line: municipal water purification (or community water treatment), point-of-entry water treatment (typically installed after the water meter to treat water entering a premise, such as a residence), and point-of-use water treatment (devices typically attached to the faucet, or installed in a jug or bottle, to treat small amounts of drinking water). Some of the methods to treat water include: filtering, distillation, reverse osmosis, deionization, and disinfection.
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