Drs Raymond M Hozalski and Timothy M LaPara University of Minnesota Legionella and Legionnaires Disease Source Schoen and Ashbolt 2011 Minneapolis VA taking steps to clean water system of Legionnaires disease bacteria ID: 929623
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Slide1
Flushing to Address Legionella Concerns Resulting from Extended Building Shutdowns
Drs. Raymond M.
Hozalski
and
Timothy M.
LaPara
University of Minnesota
Slide2Legionella and Legionnaire's Disease
Source: Schoen and
Ashbolt
(2011)
Minneapolis VA taking steps to clean water system of Legionnaires disease bacteria
Star Tribune
, Nov 27, 2015
www.pacificwater.com.au
Slide3Need for the project
Legionella
are a serious and growing
public health concern
but can be controlled with residual chlorine, which is intentionally put in the water by public utilities to prevent this and other problems
Extended building closures due to the COVID-19 pandemic results in
water stagnation
in building plumbing systemsWhen water stagnates, the residual chlorine dissipates, potentially allowing Legionella
to grow
Slide4Research QuestionsHow bad is the problem?
Quantify opportunistic pathogens in stagnant waterHow should we flush to improve water quality?Effects of time (or volume) and temperature
Slide5Project Team and Partners
U. Minnesota Facilities Management
Contact: Anita Anderson
Ray Hozalski and Tim
LaPara
have worked together for ~20 years