7/31/2015 1 Anita C. Anderson NEHA Annual Educational Conference July 15, 2015 Acknowledgments Clean Water Council –Clean Water Fund MDH Drinking Water Protection Section: manager, supervisors, staff MDH Public Health Lab Laboratory for Infection Disease and Environment (USDA-USGS Lab) DWP district engineers and field sanitarians USGS Minnesota Water Science Center USDA-ARS -Dr. Mark Borchardt MDH Study Team: IDEPC -Trisha Robinson, Amber Koskey DWP - Anita Anderson, Lih-in Rezania, Jim Walsh Dane Huber, Jared Schmaedeke, Trisha Sisto
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7/31/2015
1
Anita C. Anderson
NEHA Annual Educational ConferenceJuly 15, 2015
Acknowledgments
Clean Water Council – Clean Water FundMDH Drinking Water Protection Section: manager, supervisors, staff MDH Public Health Lab Laboratory for Infection Disease and Environment (USDA-USGS Lab) DWP district engineers and field sanitarians USGS Minnesota Water Science CenterUSDA-ARS - Dr. Mark Borchardt
MDH Study Team: IDEPC -Trisha Robinson, Amber Koskey DWP - Anita Anderson, Lih-in Rezania, Jim Walsh Dane Huber, Jared Schmaedeke, Trisha Sisto
7/31/2015
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Clean Water, Land and Legacy
Amendment 2008
• 3/8% sale tax increase • Clean Water Fund: 33%
• Drinking Water: >5% CWF
Overview
�Background of the study
�Study design and objectives
�Phase I virus monitoring
�Phase II virus monitoring & community illness (Epi) study
�Preliminary findings
�Questions
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Why viruses?
�Waterborne viral illness outbreaks have been associated with groundwater sources
�National surveys have shown that approximately 30 percent of drinking water wells may be contaminated with human pathogenic viruses (AWWARF study).
Why viruses?
� It is unknown whether these viral contaminants are responsible for a significant portion of endemic (non-outbreak) illness, or if they are responsible for outbreaks with no known cause
�Viruses are not monitored routinely and behave differently than bacterial indicators
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Why viruses?
Bacteria Viruses
Size Small (1000nm)
Smaller (20 -400nm)
Electrical Charge
Varies across cell
Negative
Maximum Lifetime in Groundwater
About 1 year Up to 3 years
ObjectivesCWF Purpose To develop and implement a groundwater virus monitoring plan, including an epidemiological study to determine the association between groundwater virus concentration and community illness rates.
MDH PurposeTo build on previous efforts aimed at determining the public health risk due to virus contamination of drinking water, and to formulate strategies and refine existing tools to reduce the risk.
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A Phased Monitoring Approach� Phase I- Virus Occurrence Assessment