MLab Internet Speed Test

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This layer displays the median download speed for a county as measured by the M-Lab speed test, available at speed.measurementlab.net . Data was aggregated from January-June, 2020. Data was accessed via the National Telecommunications and Information Administration (NTIA).

Ookla Internet Speed Test

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This layer displays the median download speed for a county or tract as measured by the Ookla speed test, available at speedtest.net . Data was aggregated from January-June, 2020. Data was accessed via the National Telecommunications and Information Administration (NTIA).

Opportunity Data – School Proficiency Index

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The school proficiency index uses school-level data on the performance of 4th grade students on state exams to describe which neighborhoods have high-performing elementary schools nearby and which are near lower performing elementary schools.

4th Grade Reading Proficiency, 2014-15

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This layer displays reading proficiency rates for counties and school districts across the United States. Data are acquired from the US Department of Education (ED) EdFacts 2014-15 data tables. Z-Scores are calculated for counties within states displaying the magnitude of each county’s deviation above or below the state average.

4th Grade Reading Proficiency by school district and county, 2016-17

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This layer displays reading proficiency rates for counties and school districts across the United States. Data are acquired from the US Department of Education (ED) EdFacts 2016-17 data tables. Z-Scores are calculated for counties within states displaying the magnitude of each county’s deviation above or below the state average.

4th Grade Reading Proficiency by school district and county, 2015-16

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This layer displays reading proficiency rates for counties and school districts across the United States. Data are acquired from the US Department of Education (ED) EdFacts 2015-16 data tables. Z-Scores are calculated for counties within states displaying the magnitude of each county’s deviation above or below the state average.

Breast Cancer Screening by County, 2017

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This layer displays the percentage of female Medicare beneficiaries age 35 and older that received an annual breast exam or mammogram in the latest report year (2017).