Arsenic pollution is quite a problem that affects drinking water. EU has launched a control program that suggest quality standards for drinking water not allowing more than 10 micrograms of arsenic per liter of water.
Many italian cities have higher levels of pollution, so high to force Local Authorities of Lazio (the region where Rome is) to take serious action in the protection of its citizens.
No, it is not the improvement of controls and filters… that would take too long. We’ll just be raising the limit from 10 to 20 micrograms.