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chas  
#1 Posted : 12 April 2019 12:41:59(UTC)
Rank: Super forum user
chas

Impressive as this new waterfall is, I wonder what the legionella risk assessment says. I am guessing UV is used to treat the water rather than chlorine. Does anyone happen to know?

https://www.bbc.co.uk/news/av/world-asia-47907500/singapore-airport-tallest-indoor-waterfall-opens

  

Dave5705  
#2 Posted : 13 April 2019 12:12:34(UTC)
Rank: Super forum user
Dave5705

It says rainwater, maybe it is collected fresh every day????

Roundtuit  
#3 Posted : 13 April 2019 20:43:44(UTC)
Rank: Super forum user
Roundtuit

A 2017 article stated the majority of the time it would use recycled rainwater only hitting peak flow when fresh rain was falling. As to the naturally occurring pathogen in a warm and wet environment no article seems to address the issue or address the "mist" associated with the drop pool.
toe  
#4 Posted : 14 April 2019 22:25:59(UTC)
Rank: Super forum user
toe

Moving water? i.e. its not stored and therefore not stagnant.

A Kurdziel  
#5 Posted : 15 April 2019 10:18:40(UTC)
Rank: Super forum user
A Kurdziel

The waterfall in question is designed by a company called WET based in California, who specialises in this sort of thing. Their website is beautiful but provides no real information and  does have  what looks like a scientist in a white labcoat holding what could be a petri dish appearing amongst the images. Perhaps this indicates that they have considered the legionella issue and have dealt with it or it could just be another stock image and they rely on the power of positive thinking to get them through these technical issues.

I am not that worried as I cannot imaging such a feature turning up at my local shopping centre any time soon.

Bazzer  
#6 Posted : 18 April 2019 11:01:30(UTC)
Rank: Forum user
Bazzer

Becasue the water is moving, doesn't mean Legionella cannot be present; assume there is a reservoir of water

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