Building maintenance and safety are generally a principal's responsibility. Custodians report to principals. Discuss with your principal first. Then report to human resources. Then enlist your union's support. Transfer to another school if possible.
Be very careful. If you do not have tenure your contract may not be renewed.
Health and safety inspections are conducted to make sure rodents have not chewed through electrical wires causing fire hazards. Seek legal counsel if you decide this is a matter of public concern or safety issue and not part of your job duties BEFORE you speak publicly. Otherwise you might lose your job. Good luck.
A lawsuit would probably be very expensive might take many years and for most people is a last resort.
Answered on Jan 13th, 2019 at 7:23 AM