Parts of a destroyed ribbed vault and scaffolding are pictured at the Notre-Dame de Paris Cathedral, Wednesday, July 17, 2019 in Paris. The chief architect of France's historic monuments says that three months after the April 15 fire that devastated Notre Dame Cathedral the site is still being secured. (Stephane de Sakutin/Pool via AP)

The city of Paris has ordered a deep cleaning for schools nearest to Notre Dame, whose lead roof melted away in the cathedral's devastating fire in April.

The announcement Thursday comes after a French investigative site reported that lead levels at many schools were far higher than considered acceptable after the April 15 fire, which sent tons of toxic lead from the cathedral's metal roof into the air.

Arnauld Gauthier of the city health department denied there were excessively high lead levels but said particular care would be taken in the annual cleaning of around 10 schools near the cathedral.

Paris' regional health agency has already recommended blood tests for children under 7 and who live near Notre Dame after confirming astronomically high lead levels in the plaza outside and on adjacent roads.

  • Flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. The city of Paris has ordered a deep cleaning of schools nearest Notre Dame, whose lead roof melted away in the fire last April. (AP Photo/Thibault Camus, File)

  • Workers are pictured during preliminary work at the Notre-Dame de Paris Cathedral, Wednesday, July 17, 2019 in Paris. The chief architect of France's historic monuments says that three months after the April 15 fire that devastated Notre Dame Cathedral the site is still being secured. (Stephane de Sakutin/Pool via AP)

  • Workers are pictured during preliminary work at the Notre-Dame de Paris Cathedral, Wednesday, July 17, 2019 in Paris. The chief architect of France's historic monuments says that three months after the April 15 fire that devastated Notre Dame Cathedral the site is still being secured. (Stephane de Sakutin/Pool via AP)

  • The building's buttress is pictured during preliminary work at the Notre-Dame de Paris Cathedral, Wednesday, July 17, 2019 in Paris. The chief architect of France's historic monuments says that three months after the April 15 fire that devastated Notre Dame Cathedral the site is still being secured. (Stephane de Sakutin/Pool via AP)

  • Workers are pictured during preliminary work at the Notre-Dame de Paris Cathedral, Wednesday, July 17, 2019 in Paris. The chief architect of France's historic monuments says that three months after the April 15 fire that devastated Notre Dame Cathedral the site is still being secured. (Stephane de Sakutin/Pool via AP)

  • Excavator pictured during preliminary work at the Notre-Dame de Paris Cathedral, Wednesday, July 17, 2019 in Paris. The chief architect of France's historic monuments says that three months after the April 15 fire that devastated Notre Dame Cathedral the site is still being secured. (Stephane de Sakutin/Pool via AP)

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