The water safety report based on quality measurements for Mantova can be found here.
On the map it will show the locations they cover please select 'Mantova' to then be provided the results
According to the Numbeo water drinkability and accessibility index, tap water has a score of 70 / 100 (100 being best).
Numbeo considers this score to be "High"
1 adult could save about 314$ per year in Mantova by drinking tap water instead of buying bottled water.
๐ณ Drinking tap water would also help with reducing your plastic footprint and improve environmental pollution.
Like in most countries, water quality and accessibility differs from location to location, therefore it's the best to check the information available on that place.