Pests and mold: a habitability problem
Pests (cockroaches, bedbugs, mice) and mold are more than a nuisance: they represent a health risk and are usually the landlord's responsibility under habitability laws.
The landlord is usually responsible
In most states, the landlord must deliver and maintain a home free of pests and infestations. Mold caused by structural problems (leaks, poor ventilation, humidity) is also usually their responsibility.
Steps to follow
Health dangers of mold
If the landlord does not act
What you can do in the meantime
Remember to document every communication with the landlord — it will be your best defense if the problem reaches legal proceedings.
