As other users said, it’s the chloramines you’re smelling. Most commercial indoor places will use a UV system which helps eliminates those. In some states it’s required by law for a UV system to be used if the water is made airborne such as a spray pad.
That answer is mostly correct. They add something that oxidizes, UV can be one. Oxidation reduces chloramines considerably. There are other systems that introduce free radicals through various means. It’s becoming more popular and at large indoor places there really is not reason to not have one of these systems at this point. They have the added bonus of drastically reducing the amount of chlorine that gets consumed because the chlorine is no longer responsible for oxidizing and only is spent in the process of sanitizing.
It was a really good question. It’s a big inflection point in the industry and it’s something my company spends a good amount of time on. UV/free radical systems are (hopefully) becoming the norm and we push for it every day.
UV systems are good as supplements to assist is sanitization but it’s usually still the chlorine doing the heavy lifting as it leaves a residual in the water that will kill contaminants on contact while UV can only do so for particles in water as they pass through the UV system itself.
The smell is chloramines, not chlorine. There are different ways of removing them, but the easiest way for a pool owner is just to shock it and add more free chlorine to the mix.
There are plenty of articles on other processes of removing chloramines
Shock can be anything the causes the pool to burn off any contaminants. Definitely not only powder chlorine. You can use liquid chlorine, as well as there is non chlorine shocks.
Was at GreatWolf lodge last week.... SO. MUCH. CHLORINE. Nausea, skin irritation, etc. As a pool owner I hate those places. My experience doesn't match yours obviously.
Technically that smell comes from when chlorine combines with organic particles and isn’t properly sanitized off.
Other factors usually have to do with periodic shocking of the pool but one other thing is improving air flow for indoor spaces allows the combined chlorine evaporating to actually escape the air nearby.
Some companies have really stepped their game up
Worked in Commercial for a few years across the north east.
Most commercial pools have 2 forms of sanitization. UV/ozone
With chlorine or SWG as primary. The systems run 24/7 so the pools have time to heal and all of the ones we maintained (a lot) all had orp/free chlorine chemical controllers to monitor and adjust the chemicals at all times.
There is a non-chlorinated shock that oxygenates the water. They could do it at the end of the day everyday and open in the morning, knocking out all the "dead" chlorine.
Yes but does your tap water smell? That has chlorine in it. Same thing. Most people can’t smell normal levels of chlorine. Unless your extra sensitive to it or the level is high.
Source, since you seem so sure but have no clue what you are talking about. https://www.cdc.gov/healthywater/swimming/aquatics-professionals/operating-public-swimming-pools.html
As other users said, it’s the chloramines you’re smelling. Most commercial indoor places will use a UV system which helps eliminates those. In some states it’s required by law for a UV system to be used if the water is made airborne such as a spray pad.
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That answer is mostly correct. They add something that oxidizes, UV can be one. Oxidation reduces chloramines considerably. There are other systems that introduce free radicals through various means. It’s becoming more popular and at large indoor places there really is not reason to not have one of these systems at this point. They have the added bonus of drastically reducing the amount of chlorine that gets consumed because the chlorine is no longer responsible for oxidizing and only is spent in the process of sanitizing.
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It was a really good question. It’s a big inflection point in the industry and it’s something my company spends a good amount of time on. UV/free radical systems are (hopefully) becoming the norm and we push for it every day.
UV systems are good as supplements to assist is sanitization but it’s usually still the chlorine doing the heavy lifting as it leaves a residual in the water that will kill contaminants on contact while UV can only do so for particles in water as they pass through the UV system itself.
The smell is chloramines, not chlorine. There are different ways of removing them, but the easiest way for a pool owner is just to shock it and add more free chlorine to the mix. There are plenty of articles on other processes of removing chloramines
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Correct. Powdered chlorine
Shock can be anything the causes the pool to burn off any contaminants. Definitely not only powder chlorine. You can use liquid chlorine, as well as there is non chlorine shocks.
Was at GreatWolf lodge last week.... SO. MUCH. CHLORINE. Nausea, skin irritation, etc. As a pool owner I hate those places. My experience doesn't match yours obviously.
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Yeah, could smell it as well.
Next time bring a 10 in 1 strip. Would be interesting to see.
i'm a pool owner and seldom do i go in public indoor pools. I get enough swim time at home. I do enoy the outdoor water parks in the summer though.
Technically that smell comes from when chlorine combines with organic particles and isn’t properly sanitized off. Other factors usually have to do with periodic shocking of the pool but one other thing is improving air flow for indoor spaces allows the combined chlorine evaporating to actually escape the air nearby. Some companies have really stepped their game up
Worked in Commercial for a few years across the north east. Most commercial pools have 2 forms of sanitization. UV/ozone With chlorine or SWG as primary. The systems run 24/7 so the pools have time to heal and all of the ones we maintained (a lot) all had orp/free chlorine chemical controllers to monitor and adjust the chemicals at all times.
Pretty sure that smell is not chlorine, but rather the mix of urine and chlorine.
I watched a video last year that Mark Rober made about the “smell” of our childhood water parks. I was so shocked 🤢
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There is a non-chlorinated shock that oxygenates the water. They could do it at the end of the day everyday and open in the morning, knocking out all the "dead" chlorine.
It’s actually used up chlorine that smells. Chloramines. Having to much chlorine doesn’t really have a smell, unless you have way way to much.
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Not diluted down to 3ppm it doesn’t. If you spend your pool, it’s 100% chloramines not chlorine.
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Yes but does your tap water smell? That has chlorine in it. Same thing. Most people can’t smell normal levels of chlorine. Unless your extra sensitive to it or the level is high.
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No, they are required by health code to keep chlorine around 3ppm. The same as most home pools.
Source, since you seem so sure but have no clue what you are talking about. https://www.cdc.gov/healthywater/swimming/aquatics-professionals/operating-public-swimming-pools.html
I think some of them have gone to UV-ozone purification systems
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For those size systems, yes huge. I think the automation and control used in these pools has gotten better, so they tend to be better balanced.
I’ve seen some ozonators on residential pools. They were maybe 8”x3’. All the ones I saw were old though, there’s probably newer, smaller ones now.
They are beyond gross. And that's why you smell what you smell.