Comparison of COVID Cases and Wastewater Concentration Dashboard

Wastewater data provide a mechanism to monitor the level of COVID transmission in the community as laboratory-based testing declines, and other, more convenient testing takes place, such as home-based rapid antigen tests, that are not reported to the Public Health Department. Wastewater can help confirm current trends of COVID infections in the community that are demonstrated by laboratory-based testing data.

This dashboard provides a comparison of the 7-day average of COVID cases compared to the 7-day average concentration of SARS-CoV-2, the virus that causes COVID, in wastewater among sewersheds that serve people who live, work and play in Santa Clara County.

Data updated Monday, Wednesday and Friday

About This Dashboard

The County of Santa Clara Public Health Department provides an overview of SARS-CoV-2 concentration in wastewater samples collected at wastewater treatment facilities that serve people in Santa Clara County. Four wastewater treatment facilities receive wastewater from designated geographic areas, known as "sewersheds", within Santa Clara County. SARS-CoV-2 is the virus that causes COVID.

For more information on SARS-CoV-2 concentrations in the wastewater, please visit the Santa Clara County SARS-CoV-2 Wastewater Monitoring Dashboard.

A case is considered someone who tests positive for COVID using viral testing performed in a lab. It is reported by the date that a sample was collected for COVID testing. Case information includes cases that are presumed to be reinfections, defined as a positive COVID test more than 90 days after the first positive test. The 7-day rolling average of new cases for one day is the average of the number of cases from the prior 7 days, excluding the most recent 7 days.

Cases are attributed to the individual's associated sewershed.

For more information on COVID cases, please visit the Santa Clara County COVID Cases and Deaths Dashboard.

How To Use This Dashboard

Select your sewershed of interest.

  • San Jose: San Jose-Santa Clara Regional Wastewater Facility serves people in the cities of San Jose, Santa Clara, and Milpitas; Cupertino Sanitary District (City of Cupertino and nearby unincorporated areas); West Valley Sanitation District (Cities of Campbell, Los Gatos, Monte Sereno, and Saratoga); County Sanitation District No. 2-3 (unincorporated area); and Burbank Sanitary District (unincorporated area).
  • Palo Alto: Palo Alto Regional Water Quality Control Plan serves people in Los Altos, Los Altos Hills, Mountain View, Palo Alto, Stanford University, and the East Palo Alto Sanitary District. Note: A portion of wastewater received at the Palo Alto Regional Water Quality Control Plan comes from San Mateo County.
  • Sunnyvale: Donald M. Somers Water Pollution Control Plan serves people in the city of Sunnyvale; Rancho Rinconada portion of Cupertino; and Moffett Federal Airfield.
  • Gilroy: South County Regional Wastewater Authority serves people in the cities of Gilroy and Morgan Hill.


  • California Reportable Disease Information Exchange
  • Sewer Coronavirus Alert Network (SCAN) Project by Stanford University

Visit the County of Santa Clara's Open Data Portal to download data related to this dashboard.

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