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Take me there!CDC has been providing the public with two versions of COVID-19 county-level community transmission level data: this historical dataset with the daily county-level transmission data from January 22, 2020, and a dataset with the daily values as originally posted on the COVID Data Tracker. Similar to this dataset, the original dataset with daily data as posted is archived on 10/20/2022. It will continue to be publicly available but will no longer be updated. A new dataset containing community transmission data by county as originally posted is now published weekly and can be found at: Weekly COVID-19 County Level of Community Transmission as Originally Posted | Data | Centers for Disease Control and Prevention (cdc.gov).
The County Level of Community Transmission indicator uses two metrics: (1) total new COVID-19 cases per 100,000 persons in the last 7 days and (2) percentage of positive SARS-CoV-2 diagnostic nucleic acid amplification tests (NAAT) in the last 7 days. For each of these metrics, CDC classifies transmission values as low, moderate, substantial, or high (below and here). If the values for each of these two metrics differ (e.g., one indicates moderate and the other low), then the higher of the two should be used for decision-making.
To prevent the release of data that could be used to identify people, data cells are suppressed for low frequency. When the case counts used to calculate the total new case rate metric ("cases_per_100K_7_day_count_change") is greater than zero and less than 10, this metric is set to "suppressed" to protect individual privacy. If the case count is 0, the total new case rate metric is still displayed.
A bug was found on 12/28/2021 that caused many records in the dataset to be duplicated. This issue was resolved on 01/06/2022.
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- Category
- Public Health Surveillance
- Permissions
- Public
- Tags
- covid-19, coronavirus, laboratory, cases, county, community transmission
- Row Label
- County Community Transmission Level by Date
- SODA2 Only
- Yes
- Data Provided By
- CDC COVID-19 Response
- Source Link
- https://covid.cdc.gov/covid-data-tracker/#county-view
- License
- Public Domain U.S. Government
- Contact Name
- Surveillance Review and Response Group
- Contact Email
- eocevent394@cdc.gov
- Publisher
- CDC
- Public Access Level
- public
- References
- https://data.cdc.gov/Public-Health-Surveillance/United-States-County-Level-of-Community-Transmissi/8396-v7yb
- Bureau Code
- 009:20
- Program Code
- 009:020
- Geographic Coverage
- US
- Temporal Applicability
- 2020-01-22/2022-10-18
- Update Frequency
- No longer updated (dataset archived)
- Suggested Citation
- Centers for Disease Control and Prevention, COVID-19 Response. United States COVID-19 County Level of Community Transmission Historical Changes - ARCHIVED (version date: October 20, 2022).
- Geospatial Resolution
- State, County