San Diego County is once again tracking the spread of COVID-19 and other respiratory illnesses through wastewater testing. KPBS health reporter Heidi de Marco explains why this matters and what the ...

A coalition of top scientists loaded its last set of wastewater samples for analysis Sunday after receiving the final word from San Diego County late last week that the work should cease due to a ...

Peering into wastewater for public health has a history dating back at least to the late 19 th century, when a biologist in Boston cultured sewage in beef jelly, bouillon, boiled potatoes, and milk to ...