The girl's injuries proved to only be slight. She has been discharged from hospital.
ABTA and the Foreign and Commonwealth Office (FCO) are renewing calls to Brits heading off on holiday to take care and use their balconies safely.
Vallori said that if there is a repetition of problems, "measures" will be taken, stressing that there is to be "maximum control".
Some 150,000 people (13% of the islands' population) live in areas where air pollution exceeds limits legally permitted in Spain.
The absence of a proper government is affecting Spanish tourism. There has been an 11% fall in the numbers saying they will go on holiday this year.