Datasets > Minnesota > 2025-present

TMDL Allocation Areas [Minnesota]

Minnesota Geospatial Commons · 2025 Full Details

Full Details

Title
TMDL Allocation Areas [Minnesota]
Description
The Minnesota Pollution Control Agency (MPCA) has developed a statewide TMDL (Total Maximum Daily Load) Database to standardize and maintain spatial data related to TMDL reports. This project stores geographic boundaries of TMDL allocation areas, maintains data attributes for integration with the TEMPO system, and is updated as new TMDL reports receive EPA approval. The database contains four primary feature layers: TMDL Project Areas, Allocation Areas (specific drainage areas where pollutant sources were assessed), and individual Streams and Lakes with approved TMDL reports. The dataset supports spatial analyses with various environmental data layers, including feedlots, surface water discharge points, riparian areas, and green infrastructure. Allocation areas, including boundary conditions, were delineated using the best available data source, however errors may remain. The 'Source' field specifies the dataset from which the allocation area was derived. Entries marked as 'Project' have been checked against the approved TMDL report. Other entries denote the allocation areas data source. Please carefully review this metadata and consult with the data owner or appropriate liaison with questions., This database enables the long-term maintenance, storage, and standardization of spatial data related to TMDL Reports. The primary purpose of the database is to house TMDL allocation areas and associated data. This allows the fast and efficient querying of what areas were assessed in past TMDLs and what areas have been assessed for specific pollutants. This ability allows for the efficient determination of what impaired waterbodies may be eligible for 4a recategorization, supports municipal separate storm sewer system (MS4), industrial stormwater (ISW), and construction stormwater (CSW) permit compliance, streamlines the identification of data gaps and priority areas for future TMDL development, and provides a centralized resource for tracking pollutant load reduction progress over time.
Creator
Minnesota Pollution Control Agency
Publisher
Minnesota Geospatial Commons
Temporal Coverage
2025-12-19
Rights
None
Access Rights
Public
Format
Files
Language
English
Date Added
December 31, 2025
Provenance Statement
The metadata for this resource was last retrieved from the Minnesota Geospatial Commons on 2025-12-31.

Resource Class

Theme

Place

Location

Download

Links

Cite and Reference

  • Citation
    Minnesota Pollution Control Agency (n.d.). TMDL Allocation Areas [Minnesota]. Minnesota Geospatial Commons. https://gisdata.mn.gov/dataset/c99f2a72-4683-43c8-bece-acec01eae89e (dataset)
  • BTAA Geoportal Link

View more items like this one...

TMDL Wasteload Allocation Areas for MS4s [Minnesota]

2025

Impaired Lakes 2012 [Minnesota]

2013

Impaired Streams 2012 [Minnesota]

2013

Impaired Streams 2010 [Minnesota]

2012

Impaired Lakes 2010 [Minnesota]

2012

Impaired Wetlands 2010 [Minnesota]

2012

Impaired Waterbodies, 2014 (Final) [Minnesota]

2018

Impaired Waterbodies, 2018 [Minnesota]

2019

Impaired Waterbodies, Proposed 2020 [Minnesota]

2021

Assessed Waters, 2018 [Minnesota]

2019