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  2. Water supply and sanitation in Chile - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    Rural water systems receive a partial investment subsidy that is defined in the Ley del Subsidio al Agua Potable y Saneamiento. [29] By law, the subsidy can cover 25-85 percent of a household's water and sewer bill up to 15 m³ per month. The client pays the rest of the bill. Beyond 15 m³, households are charged full price.

  3. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    Dalecarlia Water Treatment Plant, Washington, D.C. Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment.

  4. Water supply and sanitation in Nigeria - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    Water supply service quality and cost recovery are low. Water tariffs are low and many water users do not pay their bills. Service providers thus rely mostly on occasional subsidies to cover their operating costs. [5] National policies and Initiatives encourages the participation of private sector and reform of policy at the State level. [6]

  5. Water supply and sanitation in Japan - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    Water supply and sanitation in Japan is characterized by numerous achievements and some challenges. The country has achieved universal access to water supply and sanitation, has one of the lowest levels of water distribution losses in the world, regularly exceeds its own strict standards for the quality of drinking water and treated waste water, uses an effective national system of performance ...

  6. Aquatic ecosystem - Wikipedia

    en.wikipedia.org/wiki/Aquatic_ecosystem

    These systems contrast with freshwater ecosystems, which have a lower salt content. Marine waters cover more than 70% of the surface of the Earth and account for more than 97% of Earth's water supply [3] [4] and 90% of habitable space on Earth. [5] Seawater has an average salinity of 35 parts per thousand of water.

  7. District of Columbia Water and Sewer Authority - Wikipedia

    en.wikipedia.org/wiki/District_of_Columbia_Water...

    The District of Columbia Water and Sewer Authority (DC Water) provides drinking water, sewage collection, and sewage treatment for Washington, D.C. The utility also provides wholesale wastewater treatment services to several adjoining municipalities in Maryland and Virginia, and maintains more than 9,000 public fire hydrants in Washington, D.C.

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