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Sherburne County Multi -Hazard Mitigation Plan, 2020 <br />have stabilized in other regions. Continued demand will result in an increase in withdrawals, so <br />conservation efforts must be enacted if water table levels are to remain stable. <br />Groundwater sensitivity to pollution is measured by flow rate and soil permeability. For near surface <br />materials, areas with a high sensitivity to pollution are areas where it takes hours to a week for a <br />contaminant to reach the aquifer; areas with very low sensitivity to pollution are areas where it takes <br />months to years for a contaminant to reach the aquifer. For the bedrock aquifers, areas with a high <br />sensitivity to pollution are areas where it takes hours to months for a contaminant to reach the aquifer; <br />areas with very low sensitivity to pollution are areas where it takes a century or more for a contaminant <br />to reach the aquifer. The buried sand and gravel aquifer is relatively shallow and has many areas of <br />moderate to high pollution sensitivity. <br />Page 118 <br />