Metadata: Municipal Separate Storm Sewer System (MS4) boundaries in Minnesota

Municipal Separate Storm Sewer System (MS4) boundaries in Minnesota

This page last updated: 12/16/2020
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: Municipal Separate Storm Sewer System (MS4) boundaries in Minnesota

Abstract: In general terms, MS4s are publicly owned or operated stormwater infrastructure, used solely for stormwater, and which are not part of a publicly owned wastewater treatment system. Examples of stormwater infrastructure include curbs, ditches, culverts, stormwater ponds and storm sewer pipes.

By federal rule, stormwater systems in urban areas are labeled Mandatory MS4s. By state rule, permit applicability is based on urbanized area as defined by the latest decennial census, population, and proximity to special receiving waters (e.g., trout streams, Outstanding Resource Value Waters, and impaired waters). In addition, Minnesota requires MS4s located at least partially within an urbanized area that have resident capacity, bed count, or average daily user population of 1,000 or more to obtain a permit. These are referred to as non-traditional MS4s.

MS4 owners must establish stormwater pollution prevention programs that include public education and involvement, illicit discharge elimination, construction-site runoff controls, and stormwater best management practices.

Purpose: The locations of MS4s provide information and context to support decisions on stormwater management.

Time Period of Content Date:

Currentness Reference: This dataset was created using data as old as 2000 and as new as 2020. It was updated, after 2010, using newer data obtained for non-traditional MS4 boundaries.

Progress: In work

Maintenance and Update Frequency: As needed

Spatial Extent of Data: All MS4s lie within the state of Minnesota.

Bounding Coordinates: -97.056083

Place Keywords: Minnesota

Theme Keywords: MS4, stormwater, storm water, storm sewer, runoff, NPDES

Theme Keyword Thesaurus:

Access Constraints: None

Use Constraints: This dataset is intended only for mapping general locations and approximate spatial extents of MS4s in Minnesota.

Boundaries for corrections, education, and healthcare MS4s (subtypes) outside the metro area were based on minimal available public data on approximate location and extent. Boundaries for these MS4s inside the metro area were based on 2005 parcel data. In addition to the issue of currentness of the parcel dataset, during feature digitizing various errors were observed in 2005 parcel geometry, alignment, and attributes.

Contact Person Information: Carlee Kjeldahl, Environmental Specialist
Minnesota Pollution Control Agency
520 Lafayette Rd
St. Paul, MN  55155
Phone: 651-757-2171

Browse Graphic: None available

Associated Data Sets:

Section 2: Data Quality

Attribute Accuracy: The attributes have been checked and are expected to be reliable.

Logical Consistency:

Completeness: This dataset accurately identifies all permitted MS4s at the time of publication.

Horizontal Positional Accuracy: unknown

Vertical Positional Accuracy: unknown

Lineage: Some MS4 polygons were reused from previous MS4 shapefiles. The City, Township, County, MN DOT, and Watershed District polygons are the most updated, as they were completely recreated from new data.

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:
Field NameValid ValuesDefinitionDefinition Source
Internal feature number.Esri
Feature geometry.ESRI
MS4 permit number
Name of the MS4
Type of MS4 (city, county, township, watershed district, MNDOT, or non-traditional)
Permit Applicability (null, Population, Impaired Waters, Special Waters, or Urban Area)
Length of feature in internal units.Esri
The area covered by the MS4 in square miles.
Area of feature in internal units squared.Esri
The 2010 population, calculated based on the census tracts that have their centroids within the MS4 boundary. This calculation is more appropriate for cities and townships than for other types of MS4s. MNDOT MS4s represent roads, their populations are set to 0.
Tempo database agency interest ID. Can be used to connect this dataset to other MPCA datasets.
Tempo database agency interest name.
Does this MS4 have general permit coverage, or its own individual permit?
MS4 subprogram names. A finer classification of MS4 type (corrections, county, education, healthcare, township, transportation, watershed)

Section 6: Distribution

Publisher: Minnesota Pollution Control Agency

Publication Date: 12/16/2020

Contact Person Information: Data Desk,
Minnesota Pollution Control Agency
520 Lafayette Rd N
St. Paul, MN  55155

Distributor's Data Set Identifier: Downloadable Data

Distribution Liability: The spatial 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 data was developed by the Minnesota Pollution Control Agency for its own internal business purposes. The Minnesota Pollution Control Agency does not represent or warrant that the spatial data or the data documentation are error-free, complete, current, or accurate. You are responsible for any consequences resulting from your use of the spatial data or your reliance on the spatial data.

You should consult the data documentation for this particular spatial data to determine the limitations of the spatial data and the precision with which the GIS Data may depict distance, direction, location, or other geographic features. If you transmit or provide the spatial data (or any portion of it) to another user, the spatial data must include a copy of this disclaimer.

Ordering Instructions: This data and metadata can be downloaded from the Minnesota Geospatial Commons site at:

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: 12/16/2020

Contact Person Information: Data Desk,
Minnesota Pollution Control Agency
520 Lafayette Rd N
St. Paul, MN  55155

Metadata Standard Name: Minnesota Geographic Metadata Guidelines

Metadata Standard Version: 1.2

Metadata Standard Online Linkage:

This page last updated: 12/16/2020
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