EJScreen Map Descriptions
The below provides basic descriptions for the data included in the mapping layers available through EJScreen. EJScreen data are updated periodically. To see which years of data are in the current version, see Overview of Environmental Indicators in EJScreen or check the metadata.
- EJ Indexes
- Supplemental Indexes
- Pollution and Sources
- Socioeconomic Indicators
- Health Disparities
- Climate Change
- Critical Service Gaps
- Additional Demographics
- Threshold Maps
- Places Layers
- Boundaries
EJ Indexes
- EJ Index
There are thirteen EJ indexes in EJScreen reflecting the 13 environmental indicators, combined with socioeconomic information. The EJ index highlights block groups with the highest intersection of low-income populations, people of color, and a given environmental indicator. To calculate a single EJ index for one block group, EJScreen multiplies the environmental indicator by socioeconomic information. This socioeconomic information includes percent low-income and percent people of color (as the demographic index). This is the formula for the index:
EJ Index = (Environmental Indicator Percentile for Block Group) X (Demographic Index for Block Group)
Supplemental Indexes
- Supplemental Index
There are thirteen supplemental indexes in EJScreen reflecting the 13 environmental indicators, combined with socioeconomic information. The supplemental index highlights block groups with the highest intersection of five socioeconomic factors and a given environmental indicator. To calculate a single supplemental index for one block group, EJScreen multiplies the environmental indicator by socioeconomic information. This socioeconomic information includes percent low-income, percent linguistically isolated, percent less than high school education, percent unemployed, and low life expectancy (as the supplemental demographic index). This is the formula for the index:
Supplemental Index = (Environmental Indicator Percentile for Block Group) X (Supplemental Demographic Index for Block Group)
Pollution and Sources
- Particulate Matter 2.5 (level in air)
Particulate matter (PM2.5) levels in air, micrograms per cubic meter (µg/m3) annual average.
Source: EPA Office of Air and Radiation - Ozone (level in air)
Annual average of top ten daily maximum 8-hour air concentrations in parts per billion.
Source: EPA Office of Air and Radiation - Diesel Particulate Matter (level in air)
Diesel particulate matter level in air in micrograms per cubic meter (µg/m3).
Source: EPA Air Toxics Screening Assessment - Air Toxics Cancer Risk
Lifetime cancer risk from inhalation of air toxics, as risk per lifetime per million people.
Source: EPA Air Toxics Screening Assessment - Air Toxics Respiratory Hazard Index
Air toxics respiratory hazard index (the sum of hazard indices for those air toxics with reference concentrations based on respiratory endpoints, where each hazard index is the ratio of exposure concentration in the air to the health-based reference concentration set by EPA).
Source: EPA Air Toxics Screening Assessment - Toxic Releases to Air
RSEI modeled toxicity-weighted concentrations in air of TRI listed chemicals.
Source: RSEI Geographic Microdata - Traffic Proximity and Volume
Count of vehicles per day (average annual daily traffic) at major roads within 500 meters (or nearest one beyond 500 m), divided by distance in meters. Calculated from U.S. Department of Transportation National Transportation Atlas Database, Highway Performance Monitoring System. - Lead Paint (% pre-1960 housing)
Percent of housing units built before 1960, as indicator of potential exposure to lead paint. Calculated from the Census Bureau's American Community Survey 5-year summary estimates. - Superfund Proximity
Count of proposed and listed NPL sites within 5 km (or nearest one beyond 5 km), each divided by distance in km. Count excludes deleted sites.
Source: Calculated from EPA CERCLIS database. - Risk Management Plan (RMP) Facility Proximity
Count of RMP (potential chemical accident management plan) facilities within 5 km (or nearest one beyond 5 km), each divided by distance in km. Calculated from EPA RMP database. - Hazardous Waste Proximity
Count of hazardous waste management facilities (TSDFs and LQGs) within 5 km (or nearest one beyond 5 km), each divided by distance in km. Calculated from EPA RCRAInfo database. - Underground Storage Tanks (UST) and Leaking UST (LUST)
Count of LUSTs (multiplied by a factor of 7.7) and the number of USTs within a 1,500-foot buffered block group. Calculated from EPA UST Finder. - Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)
RSEI modeled Toxic Concentrations at stream segments within 500 meters, divided by distance in kilometers (km). Calculated from RSEI modeled toxic concentrations to stream reach segments.
Socioeconomic Indicators
The source of all the socioeconomic indicators is the Census Bureau's American Community Survey 5-year summary estimates.
- Percent people of color
The percent of individuals in a block group who list their racial status as a race other than white alone and/or list their ethnicity as Hispanic or Latino. That is, all people other than non-Hispanic white-alone individuals. The word "alone" in this case indicates that the person is of a single race, not multiracial. - Percent low-income
Percent of individuals whose ratio of household income to poverty level in the past 12 months was less than 2 (as a fraction of individuals for whom ratio was determined). - Unemployment
All those who did not have a job at all during the reporting period, made at least one specific active effort to find a job during the prior 4 weeks, and were available for work (unless temporarily ill). - Percent in limited English speaking
Percent of households in which no one age 14 and over speaks English "very well" or speaks English only (as a fraction of households). - Percent less than high school education
Percent of individuals age 25 and over with less than high school degree. - Percent under age 5
Percent of individuals under age 5 as a fraction of population. - Percent over age 64
Percent of individuals over age 64 as a fraction of the population. - Demographic Index
The demographic index in EJScreen is a combination of percent low-income and percent minority, the two socioeconomic factors that were explicitly named in Executive Order 12898 on Environmental Justice. For each Census block group, these two numbers are simply averaged together. The formula is as follows: demographic index = (% people of color + % low-income) / 2. - Supplemental Demographic Index
The supplemental demographic index in EJScreen is a combination of five socioeconomic factors 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. The formula is as follows: supplemental demographic index = (% low-income + % unemployed + % less than high school education + % limited English speaking + low life expectancy) / 5. For block groups where low life expectancy data is missing, the formula will average the other four factors.
Health Disparities
Low Life Expectancy
Average life expectancy data developed as a collaboration between NCHS, the National Association for Public Health Statistics and Information Systems, and the Robert Wood Johnson Foundation. This data is available at the tract level; the same tract value is then assigned to all sub block groups.
Source: U.S. Small-area Life Expectancy Estimates Project (USALEEP)
Heart Disease
Heart disease prevalence among adults aged 18 years or older. The term "heart disease" refers to several types of heart conditions. This data is available at the tract level; the same tract value is then assigned to all sub block groups.
Source: CDC Places Data
Asthma
Asthma prevalence among adults aged 18 or older. This data is available at the tract level; the same tract value is then assigned to all sub block groups.
Source: CDC Places Data
Cancer
Cancer (excluding skin cancer) prevalence among adults aged 18 or older. This data is available at the Census tract level; the same tract value is then assigned to all sub block groups.
Source: CDC Places Data
Persons with Disabilities
Percent of all persons with disabilities. Considers six disability types: hearing difficulty, vision difficulty, cognitive difficulty, ambulatory difficulty, self-care difficulty, and independent living difficulty. Respondents who report any one of the six disability types are considered to have a disability. For more information on each disability type visit: https://www.census.gov/topics/health/disability/guidance/data-collection-acs.html
This data is derived from Census ACS data at the tract level. Block group values are calculated by multiplying the tract value by the block population weight. The weights are derived from the same Census source used by the EJScreen buffer reports and analysis.
Source: Download ACS Data
Climate Change
Estimated 100-year floodplains
This map depicts the estimated 100-year floodplains for the Conterminous US for 2016. These data can be used to look for socially and economically vulnerable communities located within the estimated 100-year floodplains.
Source: Enviroatlas
Spatial Metadata: Enviroatlas
Sea Level Rise (NOAA)
This dataset depicts land at risk of permanent flooding when sea level rises. There are six map layers showing the area inundated at one, two, three, four, five and six feet of sea level rise. Over the next 30 years, scientists estimate a one to three-foot rise along most of the U.S. coastline. These data can be used to look for areas of potential permanent inundation based on chosen sea level rise estimates (i.e., 1 to 6 feet) in relation to locations of social and economic vulnerability.
Source: National Oceanic and Atmospheric Administration
Spatial Metadata: NOAA Office for Coastal Management
Wildfire Risk
The First Street Foundation-Wildfire Model (FSF-WFM) is a 30 meter resolution model representing the wildfire exposure for any specific location in the contiguous US, today and with the future climate change. The risk of wildfire is derived from a series of inputs associated with fire fuels, weather, human influence, and fire movement. Bringing all of these inputs together, at a national scale, in a high-resolution, climate-adjusted model represents a first-of-its-kind property-level wildfire risk model. In the development of the model, U.S. Federal Government open data are used for the foundational topography, fuels, weather, climate, and historical disturbances information, and additional data were added from a variety of state and local wildfire and land management sources to facilitate a both high resolution and future-facing (estimates both for today and for 30 years ahead) product.
Source: First Street Foundation
Flood Risk
The First Street Foundation Flood Model is a nationwide probabilistic flood model that shows the risk of flooding at any location in all 50 states and Puerto Rico due to rainfall (pluvial), riverine flooding (fluvial), and coastal surge flooding. While other hydraulic and hydrologic models show refined risks of flooding in certain areas, this model provides complete coverage across the United States at 3-meter resolution. The First Street Foundation Flood Model provides a consistent and unified methodology across the entire country with continuous outputs. This extends into areas that have no previous flood modeling and even areas that do not have recorded hydrologic data. As a result, there is increased visibility into new regions of the entire country.
Source: First Street Foundation
Critical Service Gaps
Broadband Gaps
Areas with the lowest rate of households with a broadband internet subscription.
Source: The Census Bureau's American Community Survey 5-year summary estimates.
Lack of Health Insurance
Percent of all persons without Health Insurance Coverage.
Source: Download ACS Data
Housing Burden
This dataset contains census tract level percentiles for housing cost, which is the share of households that are both earning less than 80% of Housing and Urban Development’s Area Median Family Income and are spending more than 30% of their income on housing costs. The housing cost percentiles were adopted as Housing Burden for EJScreen.
Source: U.S. Department of Housing and Urban Development
Transportation Access
The Average of Transportation Indicator uses an average of four transportation-related indicator percentiles, including Transportation Cost Burden, National Walkability Index, Percentage of Households with No Vehicle Available, and Mean Commute Time to Work. It was renamed to Transportation Access for EJScreen.
Source: The Department of Transportation's Transportation Disadvantaged Census Tracts
Food Desert
Low income and low access tract measured at 1 mile for urban areas and 10 miles for rural areas. This data is available at the tract level.
Source: USDA
Additional Demographics
Demographic information is available to add to the EJScreen map under the "Additional Demographics" button. You may click on the associated button to see metadata for that data layer. Please see the Census Bureau website for more explanations regarding the annual American Community Survey (ACS) estimates.
Threshold Maps
The threshold maps are a compilation of the various EJ indexes or the various supplemental indexes on a single map. The threshold map widget allows EJScreen users to look across all twelve indexes at once, providing a cumulative outlook on vulnerable populations facing higher pollution burdens. Users select a percentile range, for example the 80th to 100th percentile, and the tool then maps places where one or more of the indexes is within that range. The tool also allows users to select the number of indexes within the user-defined range or to select specific indicators of interest. Threshold maps are available for both the EJ indexes and the new supplemental indexes and are available for comparison at the national and state level.
Places Layers
EPA Regulated Facilities
The below includes information EPA collects through various databases about facilities or sites subject to environmental regulation.
Superfund
The Superfund Enterprise Management System (SEMS) provides information regarding sites under the Comprehensive Environmental Response, Compensation, and Liability Act -- otherwise known as CERCLA or Superfund. CERCLA provides a Federal "Superfund" to locate, investigate, and clean up uncontrolled or abandoned hazardous-waste sites as well as accidents, spills, and other emergency releases of pollutants and contaminants into the environment. The National Priorities List (NPL) is the list of national priorities among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States and its territories.
Source: EPA's Envirofacts
Water Dischargers (NPDES)
As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating sources, such as municipal and industrial wastewater treatment facilities, that discharge pollutants into waters of the United States. EPA tracks water discharge permits through the Permit Compliance System (PCS) and Integrated Compliance Information System (ICIS) databases, which includes information on when a permit was issued and when it expires, how much the company is permitted to discharge, and the actual monitoring data showing what the company has discharged.
Source: EPA's Envirofacts
Air Pollution (ICIS-AIR)
The air pollution data (ICIS-AIR) contains compliance and permit data for stationary sources of air pollution (such as electric power plants, steel mills, factories, and universities) regulated by EPA, state and local air pollution agencies. The information in ICIS-AIR is used by the states to prepare State Implementation Plans (SIPs) and to track the compliance status of point sources with various regulatory programs under Clean Air Act.
Source: EPA's Envirofacts
Hazardous Waste (TSDF and LQGs)
Hazardous waste information contained in the Resource Conservation and Recovery Act Information (RCRAInfo) includes an inventory on all generators, transporters, treaters, storers, and disposers of hazardous waste that are required to provide information about their activities.
Source: EPA's Envirofacts
Brownfields (ACRES)
The Assessment, Cleanup and Redevelopment Exchange System (ACRES) captures grantee reported data on environmental activities and accomplishments (assessment, cleanup and redevelopment), funding, job training, and details on cooperative partners and leveraging efforts for the Brownfields Program. The information in ACRES is provided at the property and grant level.
Source: EPA's Envirofacts
Toxics Release Inventory
As authorized under the Emergency Planning and Community Right-to-Know Act (EPCRA) and the Pollution Prevention Act (PPA), the Toxics Release Inventory (TRI) 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.
The map shows point locations for facilities that submitted TRI reports to EPA during the most recent reporting year. Points are relatively sized based on total quantities reported as released.
Source: EPA's Envirofacts and Facility Registry Service (FRS)
Spatial metadata: TRI
Chemical Data Reporting (TSCA)
The Toxic Substances Control Act (TSCA) grants EPA broad authority to issue regulations designed to gather health/safety and exposure information on, require testing of, and control exposure to chemical substances and mixtures. Under Section 8(a) of TSCA, the Chemical Data Reporting (CDR) rule requires manufacturers (including importers) to report information every four years on the production and use of chemicals in commerce. This map shows point locations for sites that submitted CDR reports to EPA during the most recent reporting cycle (2020).
Source: Access CDR
Spatial Metadata: CDR
Facilities Compliance Status
The map layer uses the Enforcement and Compliance History Online (ECHO) standard facility symbology to illustrate the programs each facility is regulated under, whether they are in noncompliance, and how long it has been since the last inspection. Users can choose to view all facilities or tailor the view to facilities regulated under the Clean Air Act, Clean Water Act, or Resource Conservation and Recovery Act. Source: This includes data about EPA-regulated facilities from the All Media Programs facility search and the ECHO Exporter.
Schools
The National Center for Education Statistics’ (NCES) Education Demographic and Geographic Estimate (EDGE) program develops annually updated point locations (latitude and longitude) for public elementary and secondary schools included in the NCES Common Core of Data. The NCES EDGE program collaborates with the U.S. Census Bureau’s Education Demographic, Geographic, and Economic Statistics (EDGE) Branch to develop point locations for schools and school district administrative offices based on these addresses. The point locations in this data layer were developed from the 2021-2022 CCD collection.
For more information about NCES school point data, see: National Center for Education Statistics (NCES)
Places of Worship
Point locations for buildings used for religious worship (e.g., chapel, mosque, synagogue, tabernacle, or temple).
Source: U.S. Geological Survey Geographic Names Information System (GNIS)
Spatial Metadata: Worship Places
Hospitals
Point locations for buildings where the sick or injured may receive medical or surgical attention (e.g., infirmary, clinic).
Source: U.S. Geological Survey Geographic Names Information System (GNIS)
Spatial Metadata: Hospitals
Parks
An ArcGIS WebService representing fine level manager or administrative agency name standardized for the Nation (USFS, BLM, State Fish and Wildlife, State Parks and Rec, City, NGO, etc). This map is based on the PAD-US 3.0 Combined Proclamation, Marine, Fee, Designation, Easement feature class. DOD and Tribal areas shown with 50% transparency. Use for categorization by manager name, with detailed federal managers and generic state/local/other managers.
For more information about PAD-US: Protected Areas Database of the United States (PAD-US) 3.0
Source: PAD-US Data Download
Other Environmental Data
RSEI Score
A RSEI Score is a unitless value that accounts for the size of the chemical release, the fate and transport of the chemical through the environment, the size and location of the exposed population, and the chemical's toxicity. A RSEI Score is calculated as toxicity weight multiplied by the exposed population multiplied by the estimated dose. RSEI Scores are only meaningful in comparison to other RSEI Scores.
Source: EPA's RSEI
NonAttainment Areas
If the air quality in a geographic area meets or is cleaner than the National Ambient Air Quality Standard (NAAQS), it is called an attainment area; areas that don't meet the national standard are called nonattainment areas. In some cases, EPA is not able to determine an area's status after evaluating the available information and those areas are designated "unclassifiable." These are areas that do not meet (or that contributes to ambient air quality in a nearby area that does not meet) the national primary or secondary ambient air quality standard for a NAAQS.
PM10 (1987 standard)
Description: PM10 (1987 standard)
Source and Spatial Metadata: PM10 (1987 standard)
PM2.5 Annual (2012 standard)
Description: PM2.5 Annual (2012 standard)
Source and Spatial Metadata: PM2.5 Annual (2012 standard)
PM2.5 Annual (1997 standard)
Description: PM2.5 Annual (1997 standard)
Source and Spatial Metadata: PM2.5 Annual (1997 standard)
PM2.5 24hr (2006 standard)
Description: PM2.5 24hr (2006 standard)
Source and Spatial Metadata: PM2.5 24hr (2006 standard)
SO2 1-hr (2010 standard)
Description: SO2 1-hr (2010 standard)
Source and Spatial Metadata: SO2 1-hr (2010 standard)
Lead (2008 standard)
Description: Lead (2008 standard)
Source and Spatial Metadata: Lead (2008 standard)
Ozone 8-hr (2008 standard)
Description: Ozone 8-hr (2008 standard)
Source and Spatial Metadata: Ozone 8-hr (2008 standard)
Ozone 8-hr (1997 standard)
Description: Ozone 8-hr (1997 standard)
Source and Spatial Metadata: Ozone 8-hr (1997 standard)
Water Features
Impaired Water Points
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 are required to develop a total maximum daily load (TMDL). This set of water points are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Source: EPA Office of Water ATTAINS Geospatial Data
Spatial Metadata: ATTAINS Assessment Areas
Impaired Streams
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 are required to develop a total maximum daily load (TMDL). These stream segments are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Source: EPA Office of Water ATTAINS Geospatial Data
Spatial Metadata: ATTAINS Assessment Lines
Impaired Water Bodies
The Impaired Water Bodies 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 the CWA 303(d) list and are required to develop a total maximum daily load (TMDL). This set of water areas are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Source: EPA Office of Water ATTAINS Geospatial Data
Spatial Metadata: ATTAINS Assessment Areas
Impaired Catchment
The Impaired Catchment layer includes catchment assessment units 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 the CWA 303(d) list and are required to develop a total maximum daily load (TMDL). This set of water areas are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).
Source: EPA Office of Water ATTAINS Geospatial Data
Spatial Metadata: ATTAINS Assessment Areas
Streams
The Streams layer includes linear surface water features throughout the United States. The streams layer is based on the National Hydrography Dataset (NHD).
Source: EPA Office of Water
Spatial Metadata: Streams
Water Bodies
The Water Bodies layer includes area surface features such as ponds, lakes and wide rivers. The water bodies layer is from U.S. Census Bureau TIGER/Line data.
Source: U.S. Census Bureau Areal Hydrography
Spatial Metadata: Water Bodies
Sole Source Aquifers
The Sole Source Aquifer layer includes information on the sole source aquifers (SSA) designated by EPA under section 1424(e) of the Safe Drinking Water Act of 1974. SSA's supply at least 50 percent of the drinking water consumed in the area overlying the aquifer. These areas may have no alternative drinking water source(s) that could physically, legally and economically supply all those who depend on the aquifer for drinking water.
Source: SSA Locations
Spatial Metadata: Sole Source Aquifers
Tribal Lands and Indigenous Areas
EPA makes no claims regarding the accuracy or precision of data concerning Indian country locations or boundaries. EPA has simply attempted to collect certain readily available information relating to Indian country locations.
Please note that the EPA makes no claims regarding either the spatial accuracy or precision of these data as associated boundaries and coordinate locations were delineated by the U.S. federal agencies annotated in this metadata record. Data users are encouraged to carefully reference the metadata provided by these federal agencies before using this service. These data are not better than the sources from which they were derived, and both scale and accuracy may vary across the dataset. These data are neither legal documents nor land surveys and must not be used as such. This information cannot be relied upon to create any rights, substantive or procedural, enforceable by any party in litigation with the United States or third parties. EPA reserves the right to change this dataset at any time without public notice.
Tribal Lands
This layer represents locations of American Indian Tribal lands in the lower 48 states and Alaska. The areas include all lands associated with Federally recognized tribal entities--Federally recognized Reservations, Off-Reservation Trust Lands, and Census Oklahoma Tribal Statistical Areas. EPA makes no claims regarding the accuracy or precision of data concerning Indian country locations or boundaries. EPA has simply attempted to collect certain readily available information relating to Indian country locations.
Source: EPA ArcGIS for EMEF/tribal
Alaska Native Allotments
Bureau of Land Management-defined locations based on land survey records associated with the Public Land Survey System (PLSS) and associated legislation in Alaska.
Source: EPA ArcGIS for Alaska Native Allotments
Alaska Native Villages
Boundary-centroid locations based on records provided by the Bureau of Land Management and administered under the Alaska Native Claims Settlement Act (ANSCA).
Source: EPA ArcGIS for Alaska Native Villages
American Indian Reservations
Census Bureau-defined areas set aside by the federal government for use by tribes in accordance with tribal treaties, agreements, executive orders, federal statutes, secretarial orders, and judicial determinations relevant to a given entity.
Source: EPA ArcGIS for American Indian Reservations
American Indian Off-reservation Trust Lands
Census Bureau-defined areas for which the United States holds title in trust for the benefit of a tribe or for an individual American Indian. Trust lands may be located on or off an American Indian Reservation, though the Census Bureau only tabulates data for Off-reservation trust lands with a specific federally recognized reservation and/or tribal government.
Source: EPA ArcGIS for American Indian Off-reservation Trust Lands
Oklahoma Tribal Statistical Areas (OTSA) Joint-Use Areas
As applied to OTSAs by the Census Bureau, include areas administered jointly and/or claimed by two or more American Indian tribes that have a delineated OTSA.
Source: EPA ArcGIS for Oklahoma Statistical Areas
Virginia Federally Recognized Tribes
Contains point data for federally recognized tribes geographically located in the state of Virginia, corresponding with the administrative boundaries of EPA Region 3. These tribes are federally recognized, but do not currently have land that qualifies as Indian country. Locations are based on mailing addresses for each tribe provided by the EPA Region 3 Tribal Program Coordinator to the US EPA Office of Mission Support on May 5, 2021.
Source: EPA ArcGIS for Other Federally Recognized Tribes
Tribal Cession Boundaries
U.S. Forest Service-defined boundaries depicting lands ceded to the federal government for which they may still retain rights and may not be present-day tribal boundaries.
Source: USDA ArcGIS for Indian Land Cessions in the United States
Alaska Native Regional Corporations
Census Bureau-defined, corporate entities organized to conduct both for-profit and non-profit affairs of Alaska Natives pursuant to the Alaska Native Claims Settlement Act. They have legally defined boundaries that subdivide all of Alaska into twelve regions (except for the area within the Annette Island Reserve).
Source: Census ArcGIS for Alaska Native Regional Corporations
State-recognized American Indian Reservations
Census Bureau-curated boundaries that depict reservations established by certain state governments for tribes recognized by the state.
Source: Census ArcGIS for State American Indian Reservations
Hawaiian Native Home Lands
Census Bureau-defined areas depicting the 75 Hawaiian homelands in the U.S. state of Hawaii in pursuant with the Hawaiian Homes Commission Act of 1920 (HHCA), as amended.
Source: Census ArcGIS for Hawaiian Home Lands
State-designated Tribal Statistical Areas
Statistical geographic areas identified and delineated for state recognized tribes by the Census Bureau that are not federally recognized and do not have an American Indian reservation or off-reservation trust land.
Source: Census ArcGIS for State Designated Tribal Statistical Areas
Prisons
The prison boundary feature class contains secure detention facilities. These facilities range in jurisdiction from federal (excluding military) to local governments. Polygon geometry is used to describe the extent of where the incarcerated population is located (fence lines or building footprints).
Source: Department of Homeland Security
Public Housing
This dataset provides the location, and resident characteristics of HUD administer public housing development buildings. Location data for HUD-related properties and facilities are derived from HUD's enterprise geocoding service.
To learn more about Public Housing visit: U.S. Department of Housing and Urban Development
Subsidized Public Housing
This layer represents the approximate locations of HUD’s Multifamily Housing. The locations of individual buildings associated with each property are not depicted here. HUD’s Multifamily Housing property portfolio consist primarily of rental housing properties with five or more dwelling units such as apartments or town houses, but can also include nursing homes, hospitals, elderly housing, mobile home parks, retirement service centers, and occasionally vacant land. The three largest assistance programs for Multifamily Housing are Section 8 Project Based Assistance, Section 202 Supportive Housing for the Elderly, and Section 811 Supportive Housing for Persons with Disabilities.
To learn more about Multifamily Housing visit: U.S. Department of Housing and Urban Development
Colonias
Colonias Communities (HUD)
This service denotes the locations of colonias communities as defined in Section 916 of the Cranston-Gonzalez National Affordable Housing Act of 1990.
Per Section 916 of the Cranston-Gonzalez National Affordable Housing Act of 1990, a "colonia" refers to any community that meets the following criteria:
(A) is in the State of Arizona, California, New Mexico, or Texas;
(B) is in the area of the United States within 150 miles of the border between the United States and Mexico, except that the term does not include any standard metropolitan statistical area that has a population exceeding 1,000,000;
(C) is designated by the State or county in which it is located as a colonia;
(D) is determined to be a colonia on the basis of objective criteria, including lack of potable water supply, lack of adequate sewage systems, and lack of decent, safe, and sanitary housing, and;
(E) was in existence and generally recognized as a colonia before the date of the enactment of the Cranston-Gonzalez National Affordable Housing Act.
Source: U.S. Department of Housing and Urban Development’s (HUD) colonias geospatial data
TX State Colonias
Colonias are substandard housing developments, often found along the Texas-Mexico border, where residents lack basic services such as drinking water, sewage treatment, and paved roads.
or
Typically, a residential area lacking some basic infrastructure like a drinking water supply, sewage treatment, paved roads, adequate drainage, etc. "Colonia" is a Spanish word for neighborhood.
Source: Texas Attorney General’s (TX-AG) colonias geospatial database
NM State Colonias
University of Mexico’s Bureau of Business & Economic Research (BBER) has developed an innovative technique for approximating colonia geographies and tabulating data that is representative of those communities. Using this technique, BBER tabulated 2010 Census data and American Community Survey (ACS) 2006-2010 5-Year Estimates for areas that approximate the geographic extent of various New Mexico colonias under a contract with the New Mexico Mortgage Finance Authority (MFA).
Source: University of New Mexico’s Bureau of Business and Economic Research’s (BBER) colonias geospatial database
Justice40/IRA
Justice 40
This layer built by Esri assesses and identifies communities that are disadvantaged according to Justice40 Initiative criteria. Details of the assessment are provided in the popup for every census tract in the United States and its territories American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands. This map uses 2010 census tracts from Version 0.1 of the source data downloaded November 22, 2022.
EPA IRA Disadvantaged Communities
The EPA Inflation Reduction Act (IRA) Disadvantaged Communities map combines multiple datasets that individually can be used to determine whether a community is disadvantaged for the purposes of implementing programs under the IRA. All data sets are assigned values at the Census block group level. The criteria and associated datasets used in the map are:
- Any census tract that is included as disadvantaged in CEJST
- Any census block group at or above the 90th%ile for any of EJScreen’s Supplemental Indexes when compared to the nation or state,
- and/or any geographic area within Tribal lands, as included in EJScreen
- Alaska Native Allotments
- Alaska Native Villages
- American Indian Reservations
- American Indian Off-reservation Trust Lands
- Oklahoma Tribal Statistical Areas
Source: EPA's IRA Disadvantaged Communities Map
Boundaries
Zip Codes
The Zip Codes layer provides information and identifies each postal delivery area in the United States.
Source: Data and Maps for ArcGIS
Spatial Metadata: Zip Codes
Congressional Districts
The Congressional Districts layer includes information on the 118th Congressional Districts of the United States, and U.S. Territories.
Source: ArcGIS Map Service
Spatial Metadata: Congressional Districts
City Boundaries
The City Boundaries layer includes incorporated cities and Census Designated Places from the U.S. Census Bureau TIGER/Line data.
Source: U.S. Census Bureau
Spatial Metadata: City Boundaries
Urbanized Areas
Urbanized Areas are derived from the 2019 U.S. Census Bureau TIGER/Line Urban Areas. Urbanized Areas are contiguous areas of populations greater than 50,000.
Source: U.S. Census Bureau
Spatial Metadata: Urbanized Areas
Federal Lands
The Federal Lands layer includes information on lands owned or administered by the Federal government. This layer is downloaded from the U.S. Geological Survey (USGS).
Source: USGS National Geospatial Program Small-Scale Data
Spatial Metadata: Federal Lands
Townships Boundary
The Townships Boundary layer portrays the Public Land Survey System (PLSS) boundaries of the United States to the township level. This layer is downloaded from the Bureau of Land Management (BLM) PLSS Map Service.
Source: Bureau of Land Management PLSS Townships
Spatial Metadata: Townships Boundary
Counties
The Counties layer portrays the county boundaries of the United States.
Source: U.S. Census Bureau
Spatial Metadata: Counties
States
The State layer provides state boundaries of the United States.
Source: U.S. Census Bureau
Spatial Metadata: States
EPA Regions
The EPA Regions layer includes EPA Administrative Region boundaries derived from State boundaries.
Source: EPA Office of Environmental Information (OEI)
Spatial Metadata: EPA Regions