Showing category "Pool Water Pollution" (Show all posts)

Bather Loads, Pollution, Turnover...It's All Relative.

Posted by poolplantcourses.com on Friday, August 26, 2016, In : Pool Water Pollution 
Swimming Pool Pollutionl

Relative Pollution
A pool that is 25 metres long, 12 metres wide, with an average depth of 1.5 metres will hold 450 cubic metres of water. If there are, say, 30 people in the pool, each of them will have 15 cubic metres of water each.
Contrast this situation with a spa pool. A spa will only hold about 3 - 10 cubic metres of water, depending on the type. Let's say we have a spa pool that holds 5 cubic metres and has 10 people in it. Each person now has only half of one cubic metre of water each....

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Gross Microbiological Contamination

Posted by poolplantcourses.com on Monday, April 25, 2016, In : Pool Water Pollution 
microbiological contamination in swimming pools

All commercial swimming pools should be getting the pool water tested at a UKAS-accredited laboratory for microbiological contamination. In most pools this should be done on a monthly frequency, but certain pools, such as hydrotherapy pools, should be done on a weekly basis. The four standard tests and the acceptable levels for each are:

  • Aerobic Colony Count  > 10cfu/ml
  • Total Coliforms  >10cfu/100ml 
  • E. Coli  >1cfu/100ml
  • Pseudomonas Aeruginosa  >50cfu/100ml 

If you get the lab results back ...

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Cryptosporidia

Posted by poolplantcourses.org on Tuesday, June 12, 2012, In : Pool Water Pollution 
cryptosporidia in swimming pools

Cryptosporidia is a parasite that is of particular concern for pool plant operators because it is not killed by chlorine. The parasites live inside a protective shell called an oocyst which protect them from the chlorine in the swimming pool or spa water. If these oocysts are ingested by swallowing contaminated water, the cryptosporidia with hatch out of the shells and reproduce, causing a gastro-intestinal illness. When the newly-created oocysts are expelled from the body via the faeces, the...
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Relative Pollution

Posted by poolplantcourses.org on Tuesday, February 21, 2012, In : Pool Water Pollution 
A pool that is 25 metres long, 12 metres wide, with an average depth of 1.5 metres will hold 450 cubic metres of water. If there are, say, 30 people in the pool, each of them will have 15 cubic metres of water each.

Contrast this situation with a spa pool. A spa will only hold about 3 - 10 cubic metres of water, depending on the type. Let's say we have a spa pool that holds 5 cubic metres and has 10 people in it. Each person now has only half of one cubic metre of water each.

Even though there ...
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Physical Pollution

Posted by poolplantcourses.org on Sunday, December 18, 2011, In : Pool Water Pollution 
Physical pollution is one of the three main categories of pollution that concerns pool plant operators (the other two being chemical and biological). As you might expect, physical pollution is made up of stuff that does not dissolve into the water:

  • dirt 
  • grit
  • sand
  • plasters 
  • bits of float  
Some of it will float around on the surface of the water and make it look unsightly. The deck-level surface water draw-off system will remove a good deal of this, but the skimmer and overflow channel designs are ...

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Bacteriological Contaminants

Posted by poolplantcourses.org on Saturday, December 17, 2011, In : Pool Water Pollution 
Every month, all public pools should be tested for bacteriological water quality by a UKAS accredited laboratory. These tests serve as a link of 'health check' and will give the pool operator an indication of the performance of the swimming pool plant system. There are four different tests that are carried out:

  • Aerobic colony count
  • Total coliforms
  • Escherichia coli
  • Pseudomonas aeruginosa

  • Aerobic Colony Count

    The first test, aerobic colony count, is a test for the number of bacteria in the sample of ...

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    Cryptosporidia

    Posted by poolplantcourses.org on Saturday, December 17, 2011, In : Pool Water Pollution 
    Cryptosporidia is an organism that pool operators need to be particularly aware of. The main problem with it is that the chlorine in the pool water will not kill it due to the fact that it is protected within a shell that the chlorine will not penetrate. Cryptosporidia causes an acute gastro-intestinal illness and is introduced into the pool water via faecal contamination. If someone has an accident in the pool and the result is a loose, as opposed to solid stool, you as pool operator are goi...
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