Take a look to: ...

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Take a look to:

https://www.rivm.nl/en/news/novel-coronavirus-found-in-wastewater

And also the WHO official document for COVID-19 and W&S in: 

https://www.who.int/publications-detail/water-sanitation-hygiene-and-waste-management-for-covid-19

Best regarads.

Alejo.