SOURCES OF DRINKING WATER

• Wisconsin has nearly 11,500 public water systems which meet the daily water needs of about 4 million people. Public water systems that are owned by a community are called municipal water systems. Lincoln County has 3 municipal water systems.  

GROUNDWATER PROTECTION POLICIES   

• 2 of 3 municipal water systems in Lincoln County have a wellhead protection plan: Merrill and Tomahawk.
• 1 of 3 municipal water systems in Lincoln County has a wellhead protection ordinance: Tomahawk.
• Lincoln County has adopted an animal waste management ordinance.

MONEY SPENT ON CLEANUP

• Over $157 million has been spent on petroleum cleanup in Lincoln County from leaking underground storage tanks, which equates to $251 per county resident.
• No municipal water systems in Lincoln County have spent money to reduce nitrate levels.

GROUNDWATER USE    

• From 1979 to 2005, total water use in Lincoln County has decreased from about 14.6 million gallons per day to 9.9 million gallons per day.*
• Industrial water use is the greatest component of use in the county and the decrease in total water use over this period is due to a decrease in industrial use. During this period however, industrial use increased dramatically in 1985 before declining dramatically by 2000.
• The proportion of county water use supplied by groundwater has been variable but increased from 23% to 43% during the period 1979 to 2000 and decreased to 26% in 2005.*
• Water use in Wisconsin is generally estimated for the following categories:
  • Domestic
  • Livestock
  • Aquaculture
  • Irrigation
  • Industrial
  • Commercial
  • Public use and losses
  • Thermoelectric or mining*

* Thermoelectric and mining data are not considered in water-use tables or figures on this web site. Thermoelectric-power water use is the amount of water used in the process of generating thermoelectric power. The predominant use of water is as non-contact cooling water to condense the steam created to turn the turbines and generate electricity.

SUSCEPTIBILITY OF GROUNDWATER TO CONTAMINANTS   

• Wisconsin has abundant quantities of high-quality groundwater, but once groundwater is contaminated, it's very expensive and often not technically possible to clean.
• An evaluation of the susceptibility of groundwater to contamination in Lincoln County can be seen in the FULL REPORT or accessed through the map link above.

GROUNDWATER QUALITY

• 96% of 155 private well samples collected in Lincoln County from 1990-2006 met the health-based drinking water limit for nitrate-nitrogen.  
• A 2002 study estimated that 12% of private drinking water wells in the region of Wisconsin that includes Lincoln County contained a detectable level of an herbicide or herbicide metabolite. Pesticides occur in groundwater more commonly in agricultural regions, but can occur anywhere pesticides are stored or applied.   
• There are no atrazine prohibition areas in Lincoln County.
• 98% of 45 private well samples collected in Lincoln County met the health standard for arsenic.

POTENTIAL SOURCES OF CONTAMINANTS

• There are 33 open-status sites in Lincoln County that have contaminated groundwater and/or soil. These sites include 18 Leaking Underground Storage Tank (LUST) sites, 14 Environmental Repair (ERP) sites and 1 Voluntary Party Liability Exemption (VPLE) site.  
• There are no concentrated animal feeding operations in Lincoln County.
• There are 2 licensed landfills in Lincoln County.
• There are no Superfund sites in Lincoln County.

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