Israel’s Kando (see here previously) has been busy recently helping locate the source of virus (Covid-19 and polio) and seawater contamination via Israel’s sewer system.

https://www.timesofisrael.com/spotlight/flush-with-data-kando-transforms-public-health-with-wastewater-intelligence/

https://www.youtube.com/watch?v=hb6pbcQu_7E

https://www.ourcrowd.com/companies/kando