Why sample air and water for chlorine levels in pools

[LatexZone]

Hey guys,

I'm just curious to know, why is it important to sample the air above and the water in the swimming pool for the chlorine level...and I mean, is there a technique which involves potassium iodide and a pipette?

Thanks!

 

[LatexZone]

Anybody?

 

[LatexZone]

Can anybody help me with this?

Thanks a lot.

 

[LatexZone]

Closed...

Helped myself...