U.S. COVID-19 County-Level Community Transmission Data, Archived Daily Values

7 data elements reflect daily COVID-19 community transmission levels for U.S. counties, as originally posted on the CDC's COVID Data Tracker. The dataset is archived by the Centers for Disease Control and Prevention (CDC) and was last updated on October 20, 2022. It contains reported daily transmission levels at the county level, with values used to display transmission maps.

Use Cases

• Analyze temporal trends in community_transmission_level by county_name and state_name using report_date.
• Correlate cases_per_100K_7_day_count_change with percent_test_results_reported_positive_last_7_days to study transmission dynamics.
• Map transmission risk by joining on fips_code for geospatial analysis of county-level data.
• Compare archived daily transmission levels from this dataset with corrected historical data from other CDC sources.

Strengths

• Contains 7 specific data elements including key transmission metrics like cases_per_100K_7_day_count_change and percent_test_results_reported_positive_last_7_days.
• Data is sourced from the authoritative CDC COVID Data Tracker, providing official daily snapshots.
• Available in multiple machine-readable formats including CSV, JSON, XML, and RDF.

Limitations

• Data is archived and not updated after October 20, 2022; freshness should be verified for current analyses.
• Row count is unknown, which may limit suitability assessment for large-scale modeling.
• Description metadata is limited; actual data quality and completeness require manual inspection after download.

Provenance

Source

Centers for Disease Control and Prevention (CDC) via data.cdc.gov.

Collection Method

Aggregated from jurisdictional and state partners, calculated using CDC's core metrics for community transmission.

Time Range

Covers period up to October 20, 2022. Specific start date is not provided.

Freshness

Archived; last dataset update was 2022-10-20. Metadata last updated 2025-02-23.

Geography

United States, county-level.