Metadata: Impaired Waterbodies, Minnesota, 2020

Impaired Waterbodies, Minnesota, 2020

This page last updated: 11/15/2021
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 Pollution Control Agency

Title: Impaired Waterbodies, Minnesota, 2020

Abstract: This is a set of the impaired waterbodies as determined by MPCA's surface water quality assessment process for the 2020 reporting cycle to US Environmental Protection Agency (EPA). Waterbodies declared impaired prior to 2020 are also included in this dataset unless they have been delisted. The waterbodies included in the dataset have been submitted to EPA as part of the impaired waters list.

Note that for the purpose of submitting the impaired waters list to EPA, waterbodies partially or wholly within Indian reservation boundaries are published in separate datasets. The MPCA still considers these waters impaired and has an interest in restoring them. The MPCA respectfully requests that the waters partially or wholly within Indian reservations be symbolized differently on map products so that viewers can differentiate them from waters not intersecting Indian reservations.

These waterbodies are a subset and enhancement of the 1:24,000 scale National Hydrography Dataset (NHD). In cases where the NHD does not include a feature that MPCA has assessed, a feature is added by MPCA. Since the impaired waterbodies are a small subset of the NHD, only that subset is included in the dataset. This dataset includes impaired waterbodies that have not yet had a TMDL plan approved by the US EPA.

Purpose: These data are intended to be used for planning, informational, and cartographic purposes related to surface water quality in Minnesota.

Time Period of Content Date: 11/15/2021

Currentness Reference: These data reflect the state of the MPCA's surface water assessment database as of the dataset publication date.

Progress: Complete

Maintenance and Update Frequency: None Planned

Spatial Extent of Data: State of Minnesota

Bounding Coordinates: -97.23

Place Keywords: Minnesota

Theme Keywords: inlandWaters, surface water, water chemistry, water quality

Theme Keyword Thesaurus: ISO 19115

Access Constraints: None

Use Constraints:

Contact Person Information: Kristofor Parson, Data Specialist
Minnesota Pollution Control Agency
525 S. Lake Ave.
Duluth, MN  55802
Phone: 218-302-6622

Browse Graphic: None available

Associated Data Sets:

Section 2: Data Quality

Attribute Accuracy:

Logical Consistency: These data have been audited to ensure every waterbody included in the 2020 list of impaired waters has a corresponding feature within this spatial dataset. There are three lakes included in the impaired waters list ( 69-0254-01, 69-0254-02, and 69-0254-04 ) which are represented in this dataset as a single waterbody (69-0254-00). Date of test: 11/15/2021

Completeness: These data contain a feature for every waterbody in the impaired waters dataset. High-resolution NHD is the primary dataset from which these features are drawn.

Horizontal Positional Accuracy: Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features.
This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be available from the data provider upon request.

Lineage: The processes used to create and maintain high-resolution NHD data can be requested from MPCA. Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download, and those descriptions can be associated with the impaired waters reaches by MPCA staff upon request.

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


Detailed Citation:

Table Detail:

Section 6: Distribution

Publisher: Minnesota Pollution Control Agency

Publication Date: 11/15/2021

Contact Person Information: Kristofor Parson, Data Specialist
Minnesota Pollution Control Agency
525 S. Lake Ave.
Duluth, MN  55802
Phone: 218-302-6622

Distributor's Data Set Identifier: Impaired Waterbodies, Minnesota, 2020

Distribution Liability: NOTICE: The Geographic Information System (GIS) Data to which this notice is attached are made available pursuant to the Minnesota Government Data Practices Act (Minnesota Statutes Chapter 13). THE GIS DATA ARE PROVIDED TO YOU AS IS AND WITHOUT ANY WARRANTY AS TO THEIR PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. The GIS Data were developed by the Minnesota Pollution Control Agnecy for its own internal business purposes. The Minnesota Pollution Control Agency does not represent or warrant that the GIS Data or the data documentation are error-free, complete, current, or accurate. You are responsible for any consequences resulting from your use of the GIS Data or your reliance on the GIS Data. You should consult the data documentation for this particular GIS Data to determine the limitations of the GIS Data and the precision with which the GIS Data may depict distance, direction, location, or other geographic features. If you transmit or provide the GIS Data (or any portion of it) to another user, the GIS Data must include a copy of this disclaimer.

Ordering Instructions:

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: 11/15/2021

Contact Person Information: Kristofor Parson, Data Specialist
Minnesota Pollution Control Agency
525 S. Lake Ave.
Duluth, MN  55802
Phone: 218-302-6622

Metadata Standard Name: Minnesota Geographic Metadata Guidelines

Metadata Standard Version: 1.2

This page last updated: 11/15/2021
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