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Well Field Protection Program

  • Groundwater protection 

    Protection regulations for new and existing businesses that use and store hazardous materials that pose a threat to groundwater.  To protect this valuable drinking water source, the cities of Gresham, Portland and Fairview share the same well head protection regulations.

    Map of Gresham’s groundwater protection areas 

    The City provides free, on-site assistance in the management of toxic products, including toxic product reduction, product containment, cleaning protocols and materials for in-house training.

  • Best Management Practices
    • Purchase non-toxic or low-toxicity products.
    • Safely contain toxic products.
    • Train employees on toxic products safe use, transportation, storage and clean-up.
    • Stock supplies for cleaning up spills.
    • Safely dispose of toxic products.
    Program Background

    The City and neighboring municipalities developed a groundwater protection program for the Columbia South Shore and Cascade Protection Area.

    This source of groundwater supplements water supplies from Bull Run, in addition groundwater is necessary in the event of an emergency. The City is committed to preventing groundwater contamination. 

    Program Goals
    • Maintain the quality of groundwater used as drinking water.
    • Set minimum standards for protection of groundwater in the regulated area.
    • Provide recommendations for facilities and transportation authorities, to assist them in providing groundwater protection for onsite chemical usage or activities.
  • Contact us 

    For more information, or to request copies of any of the documents on this page, contact Clay Walker at 503-618-2487 or

    Report a spill

    • Report hazardous spills by calling 911.
    • To report spills of non-hazardous materials call the City’s Operations and Maintenance office: 503-618-2626
    • After hours, call the City’s Public Works on-call notification number: 503-661-3906.
    • Report illegal dumping on private property to Code Compliance at 503-618-2248 or through My Gresham.
    • Report illegal dumping on public rights-of-way to Metro's Regional Illegal Dumping Patrol at 503-234-3000.
    • Report erosion concerns to 503-618-2474.