# Potentiometric surfaces

This page last updated: 06/26/2025
Metadata created using Minnesota Geographic Metadata Guidelines

Go to Section:

1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

## Section 1: Overview

Originator:Minnesota Department of Natural Resources
Title: Potentiometric surfaces
Abstract: Estimated potentiometric surface elevations of the buried sand and gravel and bedrock aquifers in Isanti County, Minnesota.
Purpose: Isanti County Groundwater Atlas, Part B
Time Period of Content Date:
Currentness Reference: Data were acquired or accessed between 2018 and 2019
Progress: Complete
Maintenance and Update Frequency: None Planned
Spatial Extent of Data: Isanti County, Minnesota
Bounding Coordinates: -93.514
-93.019
45.735
45.411
Place Keywords: Isanti County, Minnesota
Theme Keywords: Potentiometric surface elevations, buried sand and gravel aquifer, buried sand aquifer, bedrock aquifers
Theme Keyword Thesaurus: None
Access Constraints: None
Use Constraints: Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Minnesota Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.
Contact Person Information: CGA, GIS Specialist
Minnesota DNR - Ecological and Water Resources
500 Lafayette Rd
Saint Paul, MN 55155-4025
Phone: 651-259-5693
Email: county.groundwater.atlas.dnr@state.mn.us
Browse Graphic: None available
Associated Data Sets: Isanti County Geologic Atlas, Part A, published by the Minnesota Geological Survey (MGS). More information and downloadable data for Part A available on the MGS site: http://www.mngs.umn.edu/county_atlas/countyatlas.htm

## Section 2: Data Quality

Attribute Accuracy: 1:100,000
Logical Consistency: Data are topologically correct using ArcGIS Pro 3.3
Completeness: Complete
Horizontal Positional Accuracy: File was snapped to statewide 30 meter LiDAR data.
Vertical Positional Accuracy: NA
Lineage: These files were made with water level information from two general sources: driller's logs from the County Well Index (CWI) database managed by the Minnesota Department of Health and the Minnesota Geological Survey with verified locations, and measurements by DNR staff in conjunction with well sampling for this atlas project. The driller's log data represent a data set that was collected over a period of several decades and spans seasonal and multi-year climatic trends of wet and dry conditions. Where the dataset included both CWI driller's log information and water levels collected by DNR staff, the DNR data were used.
Static water elevation data from CWI and DNR project data as described above for each particular aquifer group were posted on individual maps. These data were contoured with the Topo to Raster tool (no drainage enforcement) to produce an elevation raster per aquifer group. The analysis mask was set to the extent of the buried aquifer group.

## Section 3: Spatial Data Organization (not used in this metadata)

## Section 4: Coordinate System

Horizontal Coordinate Scheme: Universal Transverse Mercator
UTM Zone Number: 15
Horizontal Datum: NAD83
Horizontal Units: meters
Vertical Datum:
Vertical Units:
Depth Datum:
Depth Units:

## Section 5: Attributes

Overview:
Detailed Citation:
Table Detail:

potentiometric_surfaces
Field Name | Valid Values | Definition | Definition Source
--- | --- | --- | ---
AQUIFER_Q | - | Quaternary aquifer name, usually mapped at county scale. Quaternary aquifers are named after surficial and buried sand units shown on Plate 4, Part A. Bedrock aquifers are represented by "bdrk". |
AQ_GROUP | - | Individual aquifers were grouped and treated as one aquifer system where they shared similar overlaying geology and water levels. |
AQUIFER | - | Aquifer code assigned in the County Well Index. |
ELEVATION | - | Modeled potentiometric surface elevation of the buried sand and gravel and bedrock aquifers in feet. |

## Section 6: Distribution

Publisher: Minnesota Department of Natural Resources, Ecological and Water Resources Division
Publication Date: 06/26/2025
Contact Person Information: CGA, GIS Specialist
Minnesota DNR - Ecological and Water Resources
500 Lafayette Rd
Saint Paul, MN 55155-4025
Phone: 651-259-5693
Email: county.groundwater.atlas.dnr@state.mn.us
Distributor's Data Set Identifier: potentiometric_surfaces
Distribution Liability: These data were prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which these files are based. However, the Department of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Department of Natural Resources.
Ordering Instructions: Download zip file of metadata and feature classes by clicking "I AGREE" below.
PDFs of the County Groundwater Atlas can be downloaded at: http://www.dnr.state.mn.us/waters/groundwater_section/mapping/status.html
Online Linkage: I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

## Section 7: Metadata Reference

Metadata Date: 06/26/2025
Contact Person Information: CGA, GIS Specialist
Minnesota DNR - Ecological and Water Resources
500 Lafayette Rd
Saint Paul, MN 55155-4025
Phone: 651-259-5693
Email: county.groundwater.atlas.dnr@state.mn.us
Metadata Standard Name: Minnesota Geographic Metadata Guidelines
Metadata Standard Version: 1.2
Metadata Standard Online Linkage: http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm

This page last updated: 06/26/2025
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