30-Day Hospital Readmission by County, 2020
This layer displays the percentage of Medicare inpatient readmissions within 30 days of an acute hospital stay during then reference period.
Hydrography – Rivers & Streams
Hydrography depicts surface water, including rivers and streams, lakes and ponds, canals, coastlines, and many other water features. The Hydrography layer combines two data sets: the 2021 National Map Hydrographic Geodatabase (1:1,000,000 scale) for small to medium scales, and the 2016 National Hydrography Datataset (NHD) (1:24,000 scale) for large scale mapping. Hydrography is depicted in…
Diabetes Mortality for 2015-19 by County
This layer displays diabetes mortality rates from the CDC’s National Vital Statistics System – Mortality database. Data are 5-year aggregates for 2015-19 and grouped by ICD-10 codes.
Breast Cancer Screening (Mammogram) by County, 2020
This layer displays the percentage of Medicare beneficiaries who received a mammography in the latest report year (2020).
Air Quality – Ozone Levels (O3) by Census Tract, 2015
This layer displays the daily average concentration of ozone and the percentage of days with concentrations of ozone above the National Ambient Air Quality Standard (NAAQS) of 0.075 parts per million in 2015.
Adults with no Leisure-Time Physical Activity by County, 2019
This updated layer displays the estimated percentage of adults who do not participate in any leisure-time physical activity by county. These figures are multi-year modeled estimates based on survey data from the CDC Behavioral Risk Factor Surveillance System.
Predominant Religion
This layer displays the predominant religion in each county according to the Association of Religion Data Archives (ARDA). Adherents for each congregation were summarized according to broader categories with the category with the highest number of adherents displayed here. Categories include Evangelical Protestant, Mainline Protestant, Historically Black Protestant, Judaism, Orthodox, Latter Day Saints, Catholic, or…
Medically Underserved Areas and Populations
This layer displays the location and characteristics of Primary Care Health Professional Shortage Areas (HPSAs) and Medically Underserved Areas and Populations (MUA/Ps). The HPSA layers show data for three themes: Designated Populations, Designated Types, and Clinical Scores. The MUA/P layer shows data by Designated Type. Data are current as of April 28, 2025.
Medicare Beneficiaries with 2 or More Chronic Conditions by County, 2017
This layer displays the percentage and number of Medicare Fee-for-Service Beneficiaries with two or more of the 21 standard chronic conditions.
Fall Mortality for 2016-20 by County
This layer displays fall mortality rates from the CDC’s National Vital Statistics System – Mortality database. Data are 5-year aggregates for 2016-20 and grouped by ICD-10 codes.