Decontaminated Area
French experts have said that it is quite safe to be in the Île de la Cité area, where Notre Dame is located. Dining in the area should not be a concern either, as all the businesses in the surrounding area have been thoroughly cleaned.
Some Precautions
While it is safe to visit the area, there are still some precautions that you might want to take, just to err on the side of caution. It is recommended to avoid the immediate vicinity of the church, especially with children under the age of 6.