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4 votes
Chlorine is added to kill remaining microorganisms in the water this is called what?

2 Answers

4 votes
It is called Residual Chlorine, as stated in your question it's a small level of chlorine remaining in the water. It acts as a safety net kind of, preventing unwanted microbial contamination.

Hope this helps!
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User Echom
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5 votes
"Residual Chlorine". 
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User Hoppo
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