20040121 water supply - Dane County, Wisconsin
Transcript of 20040121 water supply - Dane County, Wisconsin
Residential 30%
Irrigation 2%
Commerce & Other6%
Self - suppliedIndustry 9%
RuralDomestic
5%
Public Uses 16%(e.g. water use in parks,
schools, fire controland water main flushing)
Commercial 19%
Industrial 8%
Stock5%
Public Supplies73%
Private Supplies27%
Estimated Groundwater Use in Dane County
Recommendations:
• Alternative pumping strategies
• Maximizing infiltration
• Water conservation
• Analyzing impacts of proposed wells on sensitive resource areas
• Innovative measures(e.g., treating wastewater as a resource)
Primary Groundwater Quality Problems in Dane County
• Nitrates and Bacteria
• Pesticides
• Volatile Organic Compounds (VOCs)
• Naturally Vulnerable Areas! Locate pollution sources outside these areas! Require special conditions or controls
• Potential Problem Areas! Existing pollution source areas which threaten
drinking water supplies
Elevated Nitrate Levels:
• Over-fertilization (in excess of crop uptake)
• Manure Storage
• Failing Septic Systems
• Clusters of On-Site Systems (rural subdivisions)
Agriculture:
• Improved design/constructionof manure storage facilities
• Proper abandonment of manure storage pits
• Nutrient management planning (to reduce over-fertilization)
Residential On-Site Systems:
• Triennial inspection and maintenance
• Evaluate the impact of clusters of on-site systems (rural subdivisions)
• Replace failing systems
• Information and Education
Pesticides:
• Increased monitoring- especially extreme risk areas
• Promote alternatives to pesticides- such as Integrated Pest Management
Landfills:
• More monitoring of closed landfills (esp. extreme risk areas and well protection zones)
• Locate future sites outside these areas
• Continued support of recycling, waste-reduction and hazardous waste programs
Above Ground Storage Tanks
• Less of a problem
• However, information gaps for fuel/chemical tanks (<1,000 gals.)
• Proper storage of fuel, pesticides and fertilizers is needed
Land Application of Septage:
• County oversight/responsibility for approval of land spreading sites
• Sites should be carefully designed and located outside extreme risk areas and well protection zones
• More authorized discharge points at municipal treatment plants
Summary:All Significant Land Use and Siting Decisions Should Include an Evaluation of the Potential Groundwater and Hydrologic Impacts:
! Locate pollution sources away from high/extreme risk areas
! Locate wells where they will be adequately protected
! Pursue various management programs to reduce the risk of contaminating drinking water supplies