Protecting Wisconsin's Groundwater Through Comprehensive Planning
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  Grant County
  This report provides the most current information and data found, as of May 2007, unless otherwise noted.
  Grant County groundwater findings reports Grant County full report Switch to Grant County full report


  • 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. Grant County has 21 municipal water systems.  Table showing water systems in Grant County

GROUNDWATER PROTECTION POLICIES   Table showing water systems in Grant County

  • 6 of 21 municipal water systems in Grant County have a wellhead protection plan: Bagley, Bloomington, Dickeyville, Fennimore, Lancaster and Montfort.
  • 3 of 21 municipal water systems in Grant County have a wellhead protection ordinance: Fennimore, Lancaster and Montfort.
  • Grant County has adopted an animal waste management ordinance.


  • Over $13 million have been spent on petroleum cleanup in Grant County from leaking underground storage tanks, which equates to $274 per county resident.
  • No municipal water systems in Grant County have spent money to reduce nitrate levels.

GROUNDWATER USE    Water use figure

  • From 1979 to 2005, total water use in Grant County has decreased from 9.2 million gallons per day to about 8.1 million gallons per day. *
  • The decrease in total water use is due to decreases in domestic and industrial use, as well as public use and losses.
  • The proportion of county water use supplied by groundwater has decreased from over 98% to 93% during the period 1979 to 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.



  • 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 Grant County can be seen in the FULL REPORT or accessed through the map link above.


  • 89% of 596 private well samples collected in Grant County from 1990-2006 met the health-based drinking water limit for nitrate-nitrogen.   Nitrate map
  • A 2002 study estimated that 43% of private drinking water wells in the region of Wisconsin that includes Grant 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.   Statewide pesticide map
  • 8,894 acres of land in Grant County are in atrazine prohibition areas. Map showing atrazine prohibition areas in Grant County
  • 100% of 27 private well samples collected in Grant County met the health standard for arsenic.


  • There are 66 open-status sites in Grant County that have contaminated groundwater and/or soil. These sites include 41 Leaking Underground Storage Tank (LUST) sites, 23 Environmental Repair (ERP) sites, 1 spill site and 1 Voluntary Party Liability Exemption (VPLE) site.   BRRTS map
  • There are 3 concentrated animal feeding operations in Grant County.
  • There is 1 licensed landfill in Grant County.
  • There are no Superfund sites in Grant County.

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Grant County full report Grant County full report

For more information about this web site, its contributors, and the data contained herein, click here.

For assistance in comprehensive planning, please contact Lynn Markham, UW-Stevens Point.
For assistance on groundwater, please contact Charles Dunning, USGS.
Page contact: Webmaster, USGS
Page last updated: January 14, 2008