WastewaterSCAN Dashboard
https://data.wastewaterscan.org/tracker/?charts=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%3D&selectedChartId=fdc191
A dashboard tracking SARS-CoV-2 in California, based upon continual waste water analysis and monitoring. Other infectious viruses can be tracked from here as well, but it defaults to COVID.
This dashboard can probably be reverse engineered to extract the data for other purposes.