Locations of SNAP-Authorized Retailers

This layer displays the locations of SNAP authorized retailers across the US. Data has been updated to reflect stores accepting SNAP as of April, 2019.

Population Living Near a Major Grocery Store – Distance

This layer displays the percentage of population who live near a major supermarket or grocery store. Locations of retailers are based on a subset of locations from the April, 2019 USDA directory of SNAP-authorized retailers.

American Communities Project

The 15 community types identified in the American Communities Project (ACP) were derived from a standard clustering method of analysis, conducted by political scientist Iris Hui, PhD, where a set of 36 different indicators – everything from population density to military service members – were sorted using an algorithm that identified like places.
The majority of the data used to define the types in the ACP came from the U.S. Census American Community Survey, 2008-2012. Data on religious adherence and faith came from the Religious Congregations and Membership Study, 2010.

On-Time Graduation Rates, 2016-2017

This layer displays information about the adjusted four-year cohort graduation rate for school-districts and counties in the United States.

Air Quality System Sites

This layer displays the locations of air quality monitoring stations in the United States. The Air Quality System (AQS) contains ambient air pollution data collected by EPA, state, Local, and tribal air pollution control agencies from thousands of monitoring stations. AQS also contains meteorological data, descriptive information about each monitoring station (including its geographic location and its operator), and data quality assurance/quality control information. For more information, please visit the EPA Air Quality System web page.

Electric Bulk Power Transmission Lines

This layer represents electric power transmission lines. Transmission Lines are the system of structures, wires, insulators and associated hardware that carry electric energy from one point to another in an electric power system. Lines are operated at relatively high voltages varying from 69 kV up to 765 kV, and are capable of transmitting large quantities of electricity over long distances. Underground transmission lines are included where sources were available.

Safe Drinking Water Information System Sites

This layer displays the locations of a subset of the Environmental Protection Agency (EPA) Safe Drinking Water Information System (SDWIS) sites. The SDWIS contains information about public water systems and their violations of EPA’s drinking water regulations. Data can be accessed through the EPA’s Clip N Ship map application. For more information, please visit the Safe Drinking Water Information System web page.