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  2. Drinking water quality in the United States - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality_in...

    Under the LCR, if tests show that the level of lead in drinking water is in the area of 15 ppb or higher, it is advisable—especially if there are young children in the home—to replace old pipes, to filter water, or to use bottled water. EPA estimates that more than 40 million U.S. residents use water "that can contain lead in excess of 15 ppb".

  3. How to best filter your L.A. tap water based on your ZIP Code

    www.aol.com/news/best-filter-l-tap-water...

    In 2023, the Los Angeles Department of Water and Power — which serves about 4 million people throughout the city of Los Angeles — sourced its tap water from the Los Angeles Aqueduct, the ...

  4. California Water Service - Wikipedia

    en.wikipedia.org/wiki/California_Water_Service

    California Water Service, commonly known as Cal Water, is an American company providing drinking water and wastewater services to a number of regions within the state of California. It was founded in 1926 and is based in San Jose, California , and provides service across multiple local districts, reaching more than 484,900 customers.

  5. Lake Hughes, California - Wikipedia

    en.wikipedia.org/wiki/Lake_Hughes,_California

    In 1907 William Mulholland, superintendent of the Los Angeles Department of Water and Power, started work on the Elizabeth Lake Tunnel for transporting water in the Los Angeles Aqueduct from Owens Valley to Los Angeles. Less than a half a mile east of Lake Hughes, the five-mile-long (8 km) tunnel is 285 feet (87 m) under the valley floor.

  6. Ultrapure water - Wikipedia

    en.wikipedia.org/wiki/Ultrapure_water

    Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including organic and inorganic compounds, dissolved and particulate matter, and ...

  7. Drinking water quality standards - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality...

    Drinking water quality standards describes the quality parameters set for drinking water. Water may contain many harmful constituents, yet there are no universally recognized and accepted international standards for drinking water. Even where standards do exist, the permitted concentration of individual constituents may vary by as much as ten ...

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