COVID-19 Sewershed Restricted Case Data

The California Department of Public Health (CDPH) aggregates confirmed cases of COVID-19 by sewershed restricted locations. Confirmed cases are defined as individuals with a positive molecular test, which tests for viral genetic material, such as a polymerase chain reaction test.

Since wastewater data available starts from January 1st, 2021, rather than the beginning of the COVID-19 pandemic in 2020, the cumulative counts of the confirmed cases variable are shown as “NA”.

Please note that values less than 5 for confirmed cases are masked (shown as “Masked”) if the sewershed population size is 50,000 or fewer, in accordance with de-identification guidelines. Values less than 3 for cases are masked (shown as “Masked”) if the sewershed population size is between 50,001 and 250,000. For no confirmed cases reported, values are set as zero.

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Data and Resources

Additional Info

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Field Value
Contact Email [email protected]
Program Coronavirus Science Branch
Homepage URL https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/COVID-19/Wastewater-Surveillance.aspx
Temporal Coverage

2021 - present
Spatial/Geographic Coverage

Sewershed
Geographic Granularity Other
Language English
Frequency Weekly
License Terms of Use
Limitations Use of this data is subject to the CHHS Terms of Use and any copyright and proprietary notices incorporated in or accompanying the individual files.
Last Updated May 2, 2024, 00:14 (UTC)