Surveillance for Waterborne-Disease Outbreaks - United States, 1993-1994 Page: 33
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Vol. 45 / No. SS-1 MMWR 33
Public water system: A system, classified as either a community or a noncommunity
water system, that provides piped water to the public for human consumption and
is regulated under the Safe Drinking Water Act.
Raw water: Untreated water.
Reverse osmosis: A filtration process that removes dissolved salts and metallic ions
from water by forcing it through a semipermeable membrane. This process is also
highly effective in removing microbes from water.
Siphonage: A reversal of the normal flow of water or other liquid caused by a
negative-pressure gradient (e.g., within a water system).
Source water: Untreated water (i.e., raw water) used to produce drinking water.
Surface water: The water in lakes, rivers, reservoirs, and oceans.
Total coliforms: Nonfecal and fecal coliforms.
Turbidity: The quality (e.g., of water) of having suspended matter (e.g., clay, silt, or
plankton), which results in loss of clarity or transparency.
Untreated water: Refer to raw water.
Water utility: A water provider that distributes drinking water to a community through
a network of pipes.
Watershed: An area from which water drains to a single point; in a natural basin, the
area contributing flow (i.e., water) to a given place or a given point on a stream.
Watershed-control program: A program to protect a watershed from sources of con-
tamination or pollution.
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Center for Disease Control. Surveillance for Waterborne-Disease Outbreaks - United States, 1993-1994, text, April 12, 1996; (https://texashistory.unt.edu/ark:/67531/metadc804558/m1/75/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Special Collections.