Could this be a mold problem? I am living in a rental property and enjoy had a chronic...

I am living in a rental property and enjoy had a chronic cough/shortness of breath for the recent past few months which my GP has be unable to diagnose so far. My daughter have also had allergy problems and even my dog have been coughing.
During that time, I own noticed a white powdery substance on the floor confined to a corner of my dining room where on earth there have been a river leak coming down through the wall. There is no barefaced sign of mold growing on the wall in interview, just the white powder. Could this be mold?
BBQ Cleaning and repairing warning please.?
Answers:    Definitely! Since that wall have been showery, the stud cavity behind the wall can be full up with mold and mildew too. The medical symptoms you and your child hold are related to mold and mildew being present contained by your immediate atmosphere. You want to get out of that environment until it is properly and professionally remedied.
My washer drained sea out the bottom, wtf?
This does nouns like a mold problem. It could also be carbon monoxide or crude gas too. You can buy a simple mold test at lowes or home depot for something like 10 dollars. You take a example of the dust and send it contained by to the lab that sells the examination. You should get it rear in a couple weeks near a standard report of what the powder is. You should also ask your GP to recomend you and your daughter to a specialist for treatment so you don't get worse. You also involve to talk to your manager about this since it is affecting your vigour.