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Sulfate is a naturally-occurring substance. Health concerns
regarding sulfate in drinking water have been raised because of
reports that diarrhea may be associated with the ingestion of water
containing high levels of sulfate.
Sulfate in drinking water currently has a secondary
maximum contaminant level (SMCL) of 500 milligrams per liter (mg/L),
based on aesthetic effects (i.e., taste and odor). This regulation
is not a federally-enforceable standard, but is provided as a guideline
for states and public water systems.
The Las Vegas Valley's water supply falls within
this secondary maximum contaminant level.
For more information, go to the EPA's
Sulfate in Drinking Water page.
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