mold in apartment building 5

https://mag-wiki.win/index.php/Understanding_the_Full_Scope_of_Mold_Damage_Repair

There's a musty smell in the hallway that gets stronger near the stairwell, and I noticed black spots creeping up the wall behind the radiator in my bathroom. The landlord says it's just condensation, but the peeling paint and rotting window frames tell a different story.