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Setting limits for Legionella in water systems


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#1 Aegean

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Posted 16 January 2017 - 09:10 AM

Hi all ;

 

I need some information about setting legionella limits in tap water (for washing food contact equipment) and drinking water .

 

Since a certain regulation has not been set I am confused about countries' limits.

 

Can anyone help me on this? Or is there anyone designated some limits ? if so  taking which reference?

 

Thanks and Regards



#2 Charles.C

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Posted 16 January 2017 - 01:32 PM

Hi Aegean,

 

Offhand, I do not see any specific literature details for water/food process lines. I guess the micro. requirements for potable water represent a logical reference. I would expect yr local Public Heath Department to have such a set of micro. requirements ?

 

Opinions regarding Legionella action limits for water seem to vary significantly between locations and also with respect to application,eg cooling towers,domestic etc, for example, here is OSHA -

 

https://www.osha.gov.../otm_iii_7.html

(note the caveat - "Remember that these numbers are only guidelines, and the goal is zero detectable Legionella in a water source.")

 

and 2 examples for UK -

Attached File  legionella,2011.pdf   1.26MB   9 downloads

Attached File  Legionella,2014.pdf   88.3KB   12 downloads

 

The current UK HSE literature is accessible here -

 

http://www.hse.gov.u...ns/books/l8.htm

 

You probably need to find out which reference source is regulatory applicable to yr location.


Kind Regards,

 

Charles.C





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