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U.S. Map Layer Descriptions
Water
U.S. Wetlands (USFWS)
This layer includes U.S. wetlands listed in the National Wetlands Inventory (NWI) produced by the U.S. Fish and Wildlife Service (USFWS). Wetlands are areas where water is present at or near the surface of the soil during at least part of the year. Wetlands yield a variety of important environmental benefits; in addition to providing habitat for many species of plants and animals, they absorb pollutants and excess nutrients from aquatic systems, help buffer the effects of high flows, recharge groundwater, and help form soils. Data on the distribution and type of wetland play an important role in land use planning and several federal and state laws require that wetlands be considered during planning processes.
Sources:
USFWS National Wetlands Inventory
Impaired Waters—303(d) List (U.S. EPA)
Under section 303(d) of the Clean Water Act (CWA), states, territories, and authorized tribes are required to identify impaired waters (i.e., streams, rivers, lakes, and other water bodies that fail to meet state water quality standards), and share them with U.S. EPA in a 303(d) list. States are also required to establish priority rankings for these waters, and to develop total maximum daily loads (TMDLs) to protect them. A TMDL is the maximum amount of a pollutant that can enter a water body so that the water body is still able to meet water quality standards for that pollutant.
Impaired Streams (U.S. EPA)
The Impaired Streams layer includes streams that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These streams are on the CWA 303(d) list, and states are required to develop TMDLs to protect them. These stream segments are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Sources:
U.S. EPA Office of (OW): 303(d) Listed Impaired Waters NHDPlus Indexed Dataset
Impaired Water Bodies (U.S. EPA)
The Impaired Waterbodies layer includes bodies of water that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These water bodies are on theCWA 303(d) list, and states are required to develop TMDLs to protect them. This set of water areas is provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Sources:
U.S. EPA Office of Water (OW) 303(d) Listed Impaired Waters NHDPlus Indexed Dataset
Impaired Water Points (U.S. EPA)
The Impaired Water Points layer includes points that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These water points are on the CWA 303(d) list, and states are required to develop TMDLs to protect them. This set of water points is provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Sources:
U.S. EPA Office of Water (OW) 303(d) Listed Impaired Waters NHDPlus Indexed Dataset
Water Quality Monitoring Stations (U.S. EPA)
This layer includes locations of stations that provide monthly water quality index (WQI) data collection. The WQI Project uses monitoring data to help EPA, state, and tribal staff identify water quality problem areas.
Sources:
Enforcement and Compliance History Online (ECHO)
Sole Source Aquifers (U.S. EPA)
This layer includes information about the sole source aquifers (SSAs) designated by U.S. EPA under the Safe Drinking Water Act. SSAs are defined as aquifers that supply at least 50 percent of the drinking water consumed in the area overlying the aquifer, and where there are no reasonably available alternative drinking water sources if the aquifer becomes contaminated. If a proposed project located within an SSA is slated to receive federal funding, EPA reviews the project to ensure that it won’t contaminate the SSA.
Sources:
U.S. EPA Sole Source Aquifers
NEPAssist
CAFOs and Pollution
CAFOs From NPDES Permits (U.S. EPA)
This layer shows the locations of concentrated animal feeding operations (CAFOs) that have been issued NPDES permits and are listed in U.S. EPA’s NPDES Permit Database. (The layer was created by searching the NPDES database and filtering the results for “CONCENTRATED ANIMAL FEEDING OPERATIONS.”) Note though, that to date, there’s no thorough accounting of CAFOs on a national level because each state has its own CAFO permitting requirements and relationship to NPDES regulations. As a result, this map layer shows only a portion of NPDES-permitted CAFOs. A NPDES permit is typically a license for a facility to discharge a specified amount of a pollutant into a receiving water under certain conditions. Permits may also authorize facilities to process, incinerate, landfill, or use sewage sludge.
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CAFO Inspections, 2008–2016 (U.S. EPA)
This layer includes EPA Inspections at concentrated animal feeding operations (CAFOs) under the “Preventing Animal Waste from Contaminating Surface and Ground Water” National Compliance Initiative. Inspections include both federal-only inspections and inspections that were federally led with state participation. An inspection at an animal feeding operation (AFO) or a CAFO is typically a compliance evaluation in which the facility is inspected to determine whether it’s complying with the requirements of the CAFO regulations under the Clean Water Act.
Sources:
U.S. EPA Office of Enforcement and Compliance Assurance
CAFO Enforcement Actions, 2008–2016 (U.S. EPA)
This layer includes concluded U.S. EPA Enforcement Actions from 2008 to 2016 at concentrated animal feeding operations (CAFOs) under the “Preventing Animal Waste from Contaminating Surface and Ground Water” National Compliance Initiative.
Sources:
U.S. EPA Office of Enforcement and Compliance Assurance
Manure Application, kg N/ha/yr. (U.S. EPA)
This layer includes the average rate of manure application to agricultural lands from concentrated animal feeding operations within each subwatershed (designated by 12-digit hydrologic unit codes [HUCs]) in kilograms of nitrogen per hectare per year (kg N/ha/yr.) for 2016.
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Cleanups in My Community Sites (U.S. EPA)
This layer includes the locations of hazardous waste cleanup sites, grant areas, and details about those cleanups and grants, as well as other related information.
Sources:
U.S. EPA—Cleanups in My Community
Enforcement Compliance History Online (ECHO) Facilities (U.S. EPA)
This layer includes locations of all facilities monitored by ECHO, including air facilities, CWA facilities, RCRA facilities, and inactive facilities.
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Toxic Release Inventory (U.S. EPA)
This layer includes locations and facilities that are monitored by U.S. EPA’s Toxic Release Inventory (TRI) program, which tracks the management of certain toxic chemicals that may pose a threat to human health and the environment. U.S. facilities in different industry sectors must report annually how much of each chemical is released to the environment and/or managed through recycling, energy recovery, and treatment.
Sources:
U.S. EPA Toxic Release Inventory
Assessment Cleanup and Redevelopment Exchange System (ACRES)
This layer includes location and facility “of interest” information. ACRES stores information reported by U.S. EPA Brownfields grant recipients on brownfields properties assessed or cleaned up with grant funding as well as information on Targeted Brownfields Assessments performed by U.S. EPA Regions.
Sources:
U.S. EPA Field Registry Services: ACRES
Superfund Enterprise Management System (SEMS)
This layer includes location and attribute information for facilities regulated under the Superfund Enterprise Management System (SEMS). Superfund is a U.S. EPA program to locate, investigate, and clean up the worst hazardous waste sites in the U.S. SEMS integrates multiple legacy systems into a comprehensive inventory of active and archived hazardous waste sites evaluated by the Superfund program. It contains sites that are either proposed to be, or are on, the Superfund National Priorities List (NPL) as well as sites that are in the screening and assessment phase for possible inclusion in the NPL.
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2017 Census of Agriculture (USDA)
These layers were produced using data from the 2017 Census of Agriculture published by the U.S. Department of Agriculture (USDA) National Agricultural Statistics Service (NASS). Conducted every five years, the Census of Agriculture is a complete count of U.S. farms and ranches, providing comprehensive data on land use, production practices, operator characteristics, and a wide range of other agricultural information. (As of publication of this map in September 2023, the 2017 Census of Agriculture was the most recent census published by USDA.)
Laying Hens—Number of Hens (EnviroAtlas, USDA)
This layer shows the number of laying hens reported on farms at the end of 2017 by county. The layer was produced by EPA’s EnviroAtlas feature service using data from USDA’s 2017 Census of Agriculture.
Sources:
2017 Census of Agriculture, USDA National Agricultural Statistics Service
EnviroAtlas Laying Hens Operations Factsheet
Broiler Chickens—Number of Operations (EnviroAtlas, USDA)
This layer shows the number of operations that sold broiler chickens in 2017 by county. The layer was produced by EPA’s EnviroAtlas feature service using data from USDA’s 2017 Census of Agriculture.
Sources:
2017 Census of Agriculture, USDA National Agricultural Statistics Service
EnviroAtlas Broiler Chicken Operation Factsheet
Broiler Chickens—Number of Broiler Chickens (EnviroAtlas, USDA)
This layer includes the number of broiler chickens sold during 2017 by county. The layer was produced by EPA’s EnviroAtlas feature service using data from USDA’s 2017 Census of Agriculture.
Sources:
2017 Census of Agriculture, USDA National Agricultural Statistics Service
EnviroAtlas Broiler Chicken Operations Factsheet
2017 Census of Agriculture—Cattle Production (USDA)
(Authoritative) Esri Living Atlas
This layer includes cattle production data (i.e., sales in dollars, sales in number of animals, and number of operations with sales) reported in USDA’s 2017 Census of Agriculture at the county level. This layer was produced by Esri Living Atlas using data downloaded via USDA’s QuickStats Application. The data were transformed using the Pivot Table tool in ArcGIS Pro and joined to the county boundary file provided by USDA. The layer was published as a feature layer in ArcGIS Online.
Sources:
2017 Census of Agriculture, USDA National Agricultural Statistics Service
2017 Census of Agriculture—Dairy Production (USDA)
(Authoritative) Esri Living Atlas
This layer includes dairy production data (i.e., sales in dollars, sales in number of animals, and number of operations with sales) reported in USDA’s 2017 Census of Agriculture at the county level. This layer was produced by Esri Living Atlas using data downloaded via USDA’s QuickStats Application. The data were transformed using the Pivot Table tool in ArcGIS Pro and joined to the county boundary file provided by USDA. The layer was published as a feature layer in ArcGIS Online.
Sources:
2017 Census of Agriculture, USDA National Agricultural Statistics Service
2017 Census of Agriculture—Hog Production (USDA)
(Authoritative) Esri Living Atlas
This layer includes hog production data (i.e., sales in dollars, sales in number of animals, and number of operations with sales.) reported in USDA’s 2017 Census of Agriculture at the county level. This layer was produced by Esri Living Atlas using data downloaded via USDA’s QuickStats Application. The data were transformed using the Pivot Table tool in ArcGIS Pro and joined to the county boundary file provided by USDA. The layer was published as a feature layer in ArcGIS Online.
Sources:
2017 Census of Agriculture, USDA National Agricultural Statistics Service
Demographics
U.S. EPA-Enhanced Qualified Opportunity Zones (CDFI)
This layer includes census tracts that have been designated as Qualified Opportunity Zones (QOZs). This set of QOZ census tracts was published by the Department of the Treasury’s Community Development Financial Institutions (CDFI) Fund in December 2018. QOZ tracts are determined by meeting low-income community (LIC) thresholds, or if a non-LIC tract is contiguous to an LIC tract and its median family income does not exceed 125% of the median family income of the contiguous LIC. Last updated 2021.
Sources:
U.S. EPA’s Office of Community Revitalization (AO/OP)
Opportunity Zones (IRS)
This layer includes census tracts that have been designated as Qualified Opportunity Zones (QOZs). A QOZ is an economically distressed community where new investments may be eligible for preferential tax treatment. Localities qualify as QOZs if they were nominated for that designation by a state, the District of Columbia, or a U.S. territory and the nomination was certified by the Secretary of the U.S. Treasury via delegation of authority to the Internal Revenue Service (IRS).
Sources:
U.S. Housing and Urban Development (HUD) Office of Policy Development and Research (PD&R)
EJScreen Socioeconomic Indicators 2022 Public (U.S. EPA)
This layer includes EJScreen’s socioeconomic indicators as general indicators of a community’s potential susceptibility to environmental factors and environmental justice impacts. There are eight demographic indicators: percent people of color, percent low-income, unemployment, percent limited English speaking, percent less than high school education, percent under age 5, percent over age 64, and a demographic index that averages low income and people of color populations.
Sources:
Environmental Justice Screening and Mapping Tool (EJScreen)
EJScreen Environmental Indicators 2022 Public (U.S. EPA)
This layer includes indexes that are a combination of environmental and socioeconomic information. There are 13 environmental justice (EJ) indexes and supplemental indexes in EJScreen reflecting the 13 environmental indicators. These indexes offer a different perspective on community-level vulnerability. The supplemental indexes use the same EJScreen methodology, but incorporate a five-factor supplemental demographic index rather than the two-factor demographic index, which averages only low income and people of color populations. The supplemental demographic index is a combination of five socioeconomic factors (percent low-income, percent linguistically isolated, percent less than high school education, percent unemployed, and low life expectancy) averaged together for each Census block group. The supplemental demographic index can provide an additional perspective on potential community vulnerability and may be more relevant for use in certain situations.
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Indigenous Territories (Native Land Digital)
This layer shows the borders of Indigenous land territories across the globe. Provided by the Native Lands Digital API, the layer is updated weekly.
Justice40 Tracts May 2022 (Council of Environmental Quality)
This layer identifies communities in the U.S. that have been classified as disadvantaged communities (DACs) according to Justice40 Initiative criteria. While each state sets its own criteria for DAC classification, most DACs have a population under 10,000 with a combined median household income (MHI) of 80% of the statewide MHI. Disadvantaged communities generally have fewer socioeconomic resources and less capacity to adapt to the challenges of climate change. Many of these disadvantages are associated with environmental racism and systemic oppression.
Sources:
Office of Environmental Justice
American Indian & Alaska Native Land Area Representations (DOI & U.S. EPA 2021)
This layer includes the American Indian and Alaskan Native Land Area Representation (AIAN-LAR) dataset, which is the Bureau of Indian Affairs’ (BIA) official geospatial representation of American Indian land areas for federally recognized tribes. The layer shows the borders of Federal Indian reservations and other associated lands.
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Geology
Karst (USGS)
Glacial ice max 1
Glacial ice max
EvapBasins 1
GypsumExtent 1
SandstoneKarst48 1
Carbonates48 1
Volcanics48 1
Evaporites48 1
Piping48 1
U.S. states 48 1
U.S. states 48
Piping48
Volcanics48
Evaporites48
Carbonates48
SandstoneKarst48
EvapBasins
GypsumExtent
This group of layers includes areas underlain by soluble rocks and also by volcanic rocks, sedimentary deposits, and permafrost that have potential for karst or pseudokarst development. Karst terrain is created from the dissolution of soluble rocks, and is characterized by distinctive landforms (e.g., springs, caves, and sinkholes) and sensitive hydrogeology. Because water can easily pass through karst terrain, groundwater in these areas is extremely vulnerable to contamination by agricultural waste and other pollutants.
Sources:
United States Geological Survey
Wildlife
Critical Habitat for Threatened and Endangered Species (USFWS)
Critical Habitat—Land/Areas—Final
Critical Habitat—Streams/Waterways—Final
Critical Habitat—Land/Areas—Proposed
Critical Habitat—Streams/Waterways—Proposed
This group of layers includes proposed and designated critical habitat under the U.S. Endangered Species Act. Critical habitat is the area occupied by a species at the time the species was listed, or other areas essential to its conservation, that contains the physical and biological features that are essential to the protection of the threatened or endangered species. This National Geospatial Data Asset (NGDA) dataset is shared as a U.S. Fish and Wildlife Service (USFWS) feature layer.
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BLM Areas of Critical Environmental Concern (ACEC), (BLM)
This layer includes ACECs, which are areas within existing public lands that require special management to protect important historical, cultural, and scenic values, or fish and wildlife or other natural resources. ACECs can also be designated to protect human life and safety from natural hazards. ACECs can only be designated during the land-use planning process.
Sources:
BLM Areas of Critical Environmental Concern
SRAP GIS Portal: Indiana Map Layers
Indiana CFOs and Pollution
Confined Feeding Operations (IDEM)
This layer includes locations of all regulated confined feeding operations (CFOs) in Indiana, provided by Indiana Department of Environmental Management, Office of Land Quality (IDEM, OLQ). Attributes include farm size (CFO vs. CAFO), site name, identification numbers (IDEM), address information, NPDES information, and number and types of animals handled.
Sources:
Indiana Department of Environmental Management
Spills (IDEM)
This layer includes incidents involving spills to soil or waters in Indiana reported to IDEM’s Office of Land Quality’s (OLQ) Emergency Response program. Note: these spills are not limited to waste spills at livestock operations; spills include any unexpected, unintended, abnormal, or unapproved dumping, leakage, drainage, seepage, discharge or other loss of petroleum, hazardous substances, extremely hazardous substances, or hazardous agricultural substances. The term does not include releases to impermeable surfaces when the substance does not migrate off the surface or penetrate the surface and enter the soil. Owners/operators of facilities and modes of transportation are required to report all spills, including the total amount spilled, not the amount unrecovered. All spills require a spill response, regardless of reportability.
Sources:
Indiana Department of Environmental Management
Land Application of Solids (IDEM)
Land application involves spraying or spreading biosolids, industrial waste products, and/or pollutant-bearing water onto the land surface or injecting or incorporating them into the soil. Reuse of this waste as a soil amendment and/or fertilizer may provide benefits when strictly adhering to a science-backed Nutrient Management Plan (NMP), but it can also cause serious surface and groundwater pollution when waste is overapplied or otherwise mishandled.
IDEM Land Application Users (IDEM)
This includes information about the users who apply biosolids, industrial waste products, and/or pollutant-bearing water to land application sites (permittee, permit number, site ID, and acreage). Land application sites can be used by more than one facility. The polygon drawn in the “LandApp_Sites” layer shows the boundaries of the site. Each dot within the polygon identifies the permittee using the site.
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IDEM Land Application Facilities (IDEM)
This layer includes properties where regulated land application of biosolids, industrial waste products, and/or pollutant-bearing water have been conducted. The layer plots a point of the location of each facility that generates biosolids, industrial waste products, and pollutant-bearing water.
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IDEM Land Application Septage Storage (IDEM)
This layer includes properties where regulated land application activities have been conducted and the locations of each storage/treatment facility that treats and/or stores septage. Septage is wastewater containing domestic septic tanks, holding tanks, privies, seepage pits, cesspools, compost toilets, or portable sanitary units.
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IDEM Land Application Storage Structures (IDEM)
This layer includes the locations where a storage structure was/is to be constructed and operated for the storage of biosolids, industrial waste products, and/or pollutant-bearing water. Structure locations are identified by IDEM staff using aerial photographs submitted by the applicant/permittee during the permit application/notification process.
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IDEM Land Application Septage Boundaries (IDEM)
This layer includes the boundaries of each land application site used for the land application of septage (septage is wastewater containing domestic septic tanks, holding tanks, privies, seepage pits, cesspools, compost toilets, or portable sanitary units). All sites have been identified in the septage management permit as site-specific land application sites. Sites are drawn by IDEM staff using maps submitted by the applicant during the permit application process.
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IDEM Land Application Site Boundaries (IDEM)
This layer includes the boundaries of each land application site. All sites have either been identified in a permit as a site-specific land application site or received biosolids, industrial waste products, and/or pollutant-bearing water. Sites are drawn by IDEM staff using aerial photographs submitted by the applicant/permittee, either during the permit application process (site-specific sites) or during the review of the land application monthly reports (nonsite-specific site).
Superfund Sites (IDEM)
This layer includes locations of Superfund Program facilities. The layer shows the locations of access points to managed sites. Attributes include facility identifications, federal identification numbers, and addresses. The Office of Land Quality’s Superfund program works with the U.S. Environmental Protection Agency (U.S. EPA) Superfund to clean up sites contaminated with hazardous waste that may require complex investigations, significant cleanup actions, and long-term attention. The EPA site Information attribute links to EPA’s public information web pages for each Superfund site.
Sources:
Indiana Department of Environmental Management—Superfund Sites
Brownfields (IDEM)
Brownfields—Point Locations
Brownfields—Parcel Boundaries
These layers include point locations and corresponding parcels boundaries for Brownfields within Indiana provided by Indiana Department of Environmental Management, Office of Land Quality (IDEM, OLQ). Attributes include status (active, inactive), identification numbers (IDEM), site names, address information, and status comments from IDEM personnel.
A brownfield is a parcel of real estate that is abandoned or inactive, or may not be operated at its appropriate use. The expansion, redevelopment, or reuse of the property is complicated because the presence or potential presence of a hazardous substance, a contaminant, petroleum, or a petroleum product poses a risk to human health and the environment (per Indiana Code 13-11-2-19.3).
Indiana Department of Environmental Management – Brownfields
ArcGIS REST Service (Point Locations)
ArcGIS REST Service (Parcel Boundaries)
State Cleanup Sites (IDEM)
This layer includes locations for State Cleanup Program sites within Indiana, and is provided by Indiana Department of Environmental Management (IDEM) and Office of Land Quality (OLQ). Attributes include site names, regulatory identification numbers (IDEM), and address.
Sources:
Indiana Department of Environmental Management
Indiana Water
Impaired Streams 303(d) 2020 (IDEM)
This layer includes 303(d) listed streams designated by Indiana Department of Environmental Management (IDEM) as part of the more comprehensive Indiana Integrated Water Monitoring and Assessment Report (IR) published every two years. Streams and waterways that are listed under Section 303(d) of the Clean Water Act (CWA) have excess pollutants exceeding Total Maximum Daily Loads (TMDLs), are not clean enough to support recreational uses, and are too polluted, or otherwise degraded, to meet the water quality standards set by states, territories, or authorized tribes. Under CWA Section 303(d), states are also required to develop a priority ranking for these waters considering the severity of the pollution and the designated uses of the waters. Once this ranking of impaired waters is completed, states are required to develop TMDLs for these waters in order to achieve compliance with the water quality standards.
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Impaired Lakes 303(d) 2020 (IDEM)
This layer includes 303(d) listed lakes designated by Indiana Department of Environmental Management (IDEM) as part of the more comprehensive Indiana Integrated Water Monitoring and Assessment Report (IR) published every two years. Streams and waterways that are listed under Section 303(d) of the Clean Water Act (CWA) have excess pollutants exceeding Total Maximum Daily Loads (TMDLs) and are not clean enough to support recreational uses, and are too polluted, or otherwise degraded, to meet the water quality standards set by states, territories, or authorized tribes. Under CWA Section 303(d), states are also required to develop a priority ranking for these waters considering the severity of the pollution and the designated uses of the waters. Once this listing and ranking of impaired waters is completed, states are required to develop TMDLs for these waters in order to achieve compliance with the water quality standards.
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Water Wells (IN-DNR)
This layer includes both located water well records (which include UTM coordinates) and unlocated water well records (without UTM coordinates). The estimated locations used for the unlocated wells were based on the polygon centroid values for the smallest indicated county, section, quarter, quarter-quarter, or quarter-quarter-quarter section for over 221,000 water well records. The UTM’s were obtained for approximately 39,000 water well records from address geocoding using the owners address.
Sources:
Water Well Locations in Indiana. Indiana Department of Natural Resources, Division of Water.
NHD View Indiana (USGS)
Group Layer
Point
Point Event
Line Event
Line
Flowline
Waterbody
Area Event
Area
This group of layers includes the Indiana section of the USGS National Hydrography Dataset (NHD) service from The National Map. This group of layers is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams). The information encoded about these features includes classification and other characteristics, delineation, geographic name, position, and related measures, a “reach code” through which other information can be related to the NHD, and the direction of water flow. The network of reach codes delineating water and transported material flow allows users to trace movement in upstream and downstream directions. The NHD from The National Map supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance, and stewardship. The NHD is commonly combined with other data themes, such as boundaries, elevation, structures, and transportation, to produce general reference base maps.
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USGS National Hydrography Dataset (NHD)
Water Quality Assessment Information (IDEM)
Macroinvertebrate Sample Stations
Fish Sample Stations
Chemical Sample Stations
This group of layers includes water and aquatic biological life monitoring results across Indiana that spans over 20 years. Since 1990, data have been collected and maintained in a central repository called the Assessment Information Management System (AIMS), including the surface water monitoring activities conducted for the last 20 years. The OWQ Surface water program, Nonpoint Source and Total Maximum Daily Load (TMDL) programs, the Integrated Report, and the 303(d) Impaired Waters Listing/Delisting programs use this system and data. The parameters collected include general chemistry and other field measurements, aquatic biological life integrity and community variables, and habitat evaluations.
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IDEM Water Quality Assessment Information Management System (AIMS)
Indiana Land
Parcel Boundaries of Indiana (IN-GIO)
This layer includes land parcel boundaries maintained by county agencies in Indiana, provided by the Indiana Geographic Information Office (IGIO). These data were compiled by IGIO as part of the Indiana Data Sharing Initiative (IDSI) between Indiana Geographic Information Council (IGIC), Indiana Geographic Information Office (IGIO), Indiana Geological and Water Survey (IGWS), and participating Indiana counties to provide the most accurate framework data (including address points, street centerlines, land parcels, and governmental boundaries) for the citizens of Indiana. The attributes have been expanded to now include parcel ID, dates of harvest from each county, property classification codes, property classification descriptions, street address information, and tax district ID numbers.
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Karst Sinkhole Areas (IN-GS)
This layer includes karst sinkhole areas and sinking-stream basins associated with rocks of Silurian, Devonian, and Mississippian age in southern Indiana. In south-central Indiana, karst features are present in the Mitchell Plateau and parts of the Crawford and Norman Uplands. In southeastern Indiana, karst is present in the Muscatatuck Plateau and Charlestown Hills physiographic divisions. Karst terrain is created from the dissolution of soluble rocks, and is characterized by distinctive landforms (e.g., springs, caves, and sinkholes) and sensitive hydrogeology. Because water can easily pass through karst terrain, groundwater in these areas is extremely vulnerable to contamination by agricultural waste and other pollutants.
Sources:
Indiana Geological & Water Survey
Karst Springs (IN-GS)
Feature Layer
This layer includes locations of springs in and around the karst region of south-central Indiana. Karst terrain is created from the dissolution of soluble rocks, and is characterized by distinctive landforms (e.g., springs, caves, and sinkholes) and sensitive hydrogeology. Because water can easily pass through karst terrain, groundwater in these areas is extremely vulnerable to contamination by agricultural waste and other pollutants.
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Surficial Sand Thickness Points (IN-GS)
This layer includes total thickness of sand, as derived from logs of water wells in Indiana. Because sand and gravel layers can constitute aquifers, these layers are of hydrologic significance. Water wells are usually drilled to the uppermost major water-bearing unit and are not typically drilled through the entire thickness of surficial unconsolidated materials. Nevertheless, logs of water wells provide a source of data regarding the vertical distribution of water-bearing units. This map layer was created to provide an overview of the distribution of sand and gravel in Indiana.
Sources:
Indiana Geological & Water Survey
SRAP GIS Portal: Wisconsin Layers
Wisconsin CAFOs
Permitted CAFOs in Wisconsin, 2022 (WI DNR)
This layer includes locations for concentrated animal feeding operations (CAFOs) that are permitted by the Wisconsin Pollutant Discharge Elimination System (WPDES). The state regulates waste storage structures and manure application at large farms such as CAFOs under the U.S. EPA Clean Water Act’s pollutant discharge permit program (known nationally as NPDES, and in Wisconsin as WPDES). WPDES permits are renewed every five years and may be modified, as needed, during the five-year permit term, and require a Nutrient Management Plan (NMP). NMP changes occur at least annually, and public input is required before the Department of Natural Resources issues a new, renewed, or modified WPDES permit or approves substantial modifications to an NMP.
Sources:
Wisconsin Department of Natural Resources WPDES and NMPs
Wisconsin CAFO Field Boundaries (WI DNR)
This layer includes field boundaries for land application fields (of CAFO waste) in Wisconsin. These parcels are part of Wisconsin’s Department of Natural Resources (WI DNR) Nutrient Management Program (NMP), which requires annual reports, NMP updates, and soil tests every four years. This dataset was provided by WI DNR.
Sources:
WI DNR Nutrient Management Program
Wisconsin Waters
Impaired Waters—303(d) List (U.S. EPA)
Under section 303(d) of the Clean Water Act (CWA), states, territories, and authorized tribes are required to identify impaired waters (i.e., streams, rivers, lakes, and other water bodies that fail to meet state water quality standards), and share them with U.S. EPA in a 303(d) list. States are also required to establish priority rankings for these waters, and to develop total maximum daily loads (TMDLs) to protect them. A TMDL is the maximum amount of a pollutant that can enter a water body so that the water body is still able to meet water quality standards for that pollutant.
303(d) Impaired Rivers and Streams (WI DNR)
This layer includes Wisconsin rivers and streams listed as impaired under Section 303(d) of the Clean Water Act (CWA).
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303(d) Impaired Lakes (WI-DNR)
This layer includes Wisconsin lakes listed as impaired under Section 303(d) of the Clean Water Act (CWA).
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Wisconsin Land
DNR Managed Properties (WI DNR)
This layer contains boundaries for DNR-owned land, DNR easements on private land, and DNR leases on federal- and county-owned land. DNR easements on privately held property are not included.
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DNR Managed Land Parcels (WI DNR)
This layer contains DNR Managed Lands as parcels with local property names, and GIS and deed acreages. Parcels are symbolized as fee simple (DNR-owned), DNR easements on private land (open/restricted public access), and DNR leases on federal- and county-owned land. This dataset does not contain closed fee or easement.
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Land Type Associations—Ecologically Significant Regions (WI DNR)
Land Type Associations (LTAs) of Wisconsin represent a further definition of the National Hierarchical Framework of Ecological Units (NHFEU). The NHFEU is an ecological classification system that divides landscapes into ecologically significant regions at multiple scales. Ecological types are classified and units are mapped based on the associations of biotic and environmental factors which include climate, physiography, water, soils, air, hydrology, and potential natural communities. The development of this layer of information supplies a spatially oriented, ecological classification tool that is available to a variety of landowners, land managers, and resource interest groups in Wisconsin and the Great Lakes states.
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