Michigan Subwatershed Summary Statistics [Michigan]
Michigan Dept. of Environment, Great Lakes, and Energy · 2025 Full Details
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Full Details
- Title
- Michigan Subwatershed Summary Statistics [Michigan]
- Description
- This layer is intended to provide estimates of nonpoint sources on the subwatershed (HUC-12) level in the state of Michigan. These include estimates of livestock agriculture (such as livestock numbers and manure land-application area), lost wetland, natural riparian buffers, and the amount of land that is covered by impervious surfaces. Each nonpoint source indicator (or stressor) is given a category based on how the subwatershed compares with all other subwatersheds in the entire state (e.g. a subwatershed that is marked as "high" for impervious surfaces would have a high amount of impervious surface relative to the state median value). Land cover (NOAA, 2023) , population and housing unit data (US Census Bureau, 2020), agricultural census data (USDA, 2020) , Michigan Department of Environment, Great Lakes, and Energy (EGLE) Water Resources Division CAFO permitting program (2025) , and lost wetland (Fizzell, 2015) are summarized for each 12-digit HUC level subwatershed in Michigan. The number of hogs and cattle, and the percent of agricultural land that has manure land-applied or tiled, are estimates derived from county-based agricultural census and EGLE-WRD CAFO permitting data. The agricultural census county-level data were then distributed geographically across all agricultural land cover in that county, assuming even distribution or impact of a given stressor. EGLE-WRD CAFO permitting livestock data were evenly distributed across associated CAFO fields. Natural riparian buffer coverage is a percent of stream miles with a 30 meter natural vegetation buffer, and was created by buffering the stream hydrography layer and interesecting the buffer with forested and wetland 2023-era land cover. Field Name Description HUC12 Hydrologic Unit Code (HUC) 12 is a subwatershed identifier that is the smallest unit in the US Geological Survey's (USGS) Watershed Boundary Dataset. HUC12Name Name of the subwatershed PopulationEstimation Estimated population in a subwatershed, approximation from 2020 decennial census block data. PopulationStatewideRank Categorical ranking of subwatershed population, indiciating how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2020 US Census blocks. HousingUnitsEstimation Estimated number of housing units in a subwatershed, approximation from 2020 decennial census block data. HousingUnitsStatewideRank Categorical ranking of the number of housing units in a subwatershed, indicating how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2020 US Census blocks. LandCoverPercentDeveloped Percentage of total subwatershed land cover that is developed summarized from the 2023 National Land Cover Dataset (NLCD) LandCoverPercentAgricultural Percentage of total subwatershed land cover that is agricultural summarized from the 2023 National Land Cover Dataset (NLCD) LandCoverPercentWetland Percentage of total subwatershed land cover that is wetland summarized from the 2023 National Land Cover Dataset (NLCD) LandCoverPercentForest Percentage of total subwatershed land cover that is forested, summarized from the 2023 National Land Cover Dataset (NLCD) LandCoverPercentOther Percentage of total subwatershed land cover that is in other categories (open water, barren land, shrub/scrub, etc.) summarized from the 2023 National Land Cover Dataset (NLCD) ImperviousSurfaceRank Categorical ranking of the proportion of impervious land cover in a subwatershed, indicating how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2023 C-CAP NOAA Impervious Land Cover dataset. ImperviousSurfaceAcres Measurement (in acres) of impervious land cover in a subwatershed. Original data sourced from the 2023 C-CAP NOAA Impervious Land Cover dataset. WetlandsLostRank Categorical ranking of the proportion of pre-settlement wetlands that have been lost, or developed. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2005 National Wetlands Inventory. EGLEManureApplicationAreaAcre Measurement (in acres) of land area that has (or is eligible) for land applications of manure. Original data sourced from EGLE-WRD Combined Animal Feeding Operations permitting program as of February 25, 2025. EGLEManureApplicationAreaPer Percentage of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure according to EGLE-WRD CAFO permitting program. Original data sourced from EGLE-WRD Combined Animal Feeding Operations permitting program as of February 25, 2025. Note: This estimate only includes permitted CAFO operations. EGLEManureApplicationAreaRank Categorical ranking of the proportion of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the EGLE-WRD Combined Animal Feeding Operations permitting program as of February 25, 2025. AgCenManureApplicationAreaAcre Agricultural Census 2020 County level measurements (in acres) of land area that has had land applications of manure were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land. AgricultureAcres Agricultural Area (in acres) of a subwatershed according to the 2023 NLCD. AgCenManureApplicationAreaPer Percentage of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure according the 2020 Agricultural Census. AgCeManureApplicationAreaRank Categorical ranking of the percentage of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure according the 2020 Agricultural Census. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. TotalRiparianAreaSqMi Total Riparian Area within subwatersheds measured using a 30 meter buffer of rivers and streams (extracted from National Hydrography Dataset- High Resolution). VegetatedRiparianAreaSqMi Total Riparian Area within subwatersheds indicating the area of wetland and forested land cover types (2023 NLCD) within 30 meters of rivers and streams (extracted from National Hydrography Dataset- High Resolution). PercentOfVegetatedBuffer Percentage of total riparian area that is vegetated (consisting of wetland and forest land cover types) within a subwatershed. VegetatedBufferRank Categorical ranking of the percentage of riparian areas that are vegetated for a subwatershed. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. HogCount Agricultural Census 2020 County level hog counts were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land. HogRank Categorical ranking of the number of Hogs in a subwatershed according the 2020 Agricultural Census. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. CattleCount Agricultural Census 2020 County level Cattle counts were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land. CattleRank Categorical ranking of the number of Cattle in a subwatershed according the 2020 Agricultural Census. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. TileDrainAcresPercent Percentage of total agricultural land in a subwatershed that is tile-drained, assuming even distribution of tile drained acres from Agricultural Census 2020 County level data across agricultural land. TileDrainAcres Agricultural Census 2020 County level tile drain acres were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land. TileDrainRank Categorical ranking of the amount of agricultural land that is tile drained. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. SepticSystemsEstimateAndRank Estimated number of septic systems and statewide ranking indicating how the subwatershed compares with all other subwatersheds in Michigan. Learn more about Michigan's Statewide E. coli Total Maximum Daily Load. Additional questions can be directed to Chris Vandenberg at VandenbergC@Michigan.gov .
- Creator
- Michigan Dept. of Environment, Great Lakes, and Energy
- Temporal Coverage
- Last Modified: 2025-08-29
- Date Issued
- 2025-08-29
- Rights
- This application or dataset, along with any maps, data, content and other information contained within it and all output from the application (together the “Information”), is provided as a public service, and there are no restrictions on the use, reproduction, or distribution of the Information. It is your responsibility to use the Information for a legally permissible purpose. This Information is provided “AS IS” and on an “AS AVAILABLE” basis. The State of Michigan (“State”) makes no warranties, express or implied, regarding the accuracy, adequacy, reliability, timeliness, or completeness of this Information. THE STATE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS INFORMATION, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF PROPRIETARY RIGHTS. THE STATE WILL NOT BE LIABLE, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR BY STATUTE OR OTHERWISE, FOR ANY CLAIM FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT, OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION LOST PROFITS AND LOST BUSINESS OPPORTUNITIES, RELATED TO THE ACCESS OR USE OF THIS INFORMATION. IN NO EVENT WILL THE STATE BE LIABLE FOR ANY AMOUNTS THAT MAY RESULT FROM THE ACCESS OR USE OF THIS INFORMATION, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR BY STATUTE OR OTHERWISE. By accessing or using this Information, you agree that you will not make any claims against the State or any of its departments, divisions, officers, or employees related to your use of the Information. These terms are governed by and interpreted under the laws of the State of Michigan without regard to conflict of laws provisions. Nothing in these terms is meant to impact or replace any existing rights or licenses, such as copyright, trademark, or patent protections, in materials or content that may be located on the site or portal containing the Information.
- Access Rights
- Public
- Format
- ArcGIS FeatureLayer
- Language
- English
- Date Added
- September 16, 2025
- Provenance Statement
- The metadata for this resource was last retrieved from State of Michigan Open Data Portal on 2025-09-15.
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Cite and Reference
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Citation
Michigan Dept. of Environment, Great Lakes, and Energy (2025). Michigan Subwatershed Summary Statistics [Michigan]. . https://gis-michigan.opendata.arcgis.com/datasets/egle::michigan-subwatershed-summary-statistics (web service) -
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