COVID Viral Levels in San Francisco Wastewater

SCAN researchers track COVID levels in wastewater across the city in two sewershed locations: Oceanside (west SF) and Southeast (east SF).  

The Y axis is measured by COVID gene copies per mass (gram) of wastewater solids normalized by an internal control, the pepper mild mottle virus (PMMoV), as a water quality indicator. Chart: Liz Lindqwister Source: Sewer Coronavirus Alert Network (SCAN)
The San Francisco Standard