Assertion: chlorine dioxide's chlorine | /r/AtLocation | swimming pools
Facets:
Source sentences:
text: Why is chlorine added to swimming pools?
text: Chlorine, in one form or another, is added to most swimming pools, spas, and public water supplies because it kills bacteria that cause disease.
text: Chlorine that is added to swimming pools is "free" chlorine, in that it has not yet bonded with nitrates, ammonia or other compounds in the dirty pool water.