Rats can quickly go from a small nuisance to a serious rat infestation, especially where food, trash, or hidden entry points make it easy for them to stay.
If you want to report rats, first contact the right local authority and then document what you saw so your complaint is clear and actionable.
The fastest way to get results is to report the problem to the local health department. If you rent, let your landlord know right away too.
In many U.S. cities, this combination gets an inspection moving and starts the cleanup process.

What To Do Before You File a Complaint

A strong complaint gives the inspector a clear picture of where the issue is happening and what kind of rodent activity you noticed.
Take a few minutes to gather details safely so your report is easier to act on.
Signs To Document Before Reporting
Write down the exact address, apartment number, alley, storefront, or other location where you saw activity.
Note whether you saw live rats, nests, burrows, gnaw marks, greasy rub marks, or rat droppings, since those clues help confirm the scope of the problem.
Photos can make your report more useful, especially if the activity happens in hard-to-access areas.
The NYC Health Department complaint guidance explains that location details matter because inspectors need enough information to find the problem.
When Rat Droppings And Damage Matter Most
Rat droppings, chewed packaging, holes, and damaged baseboards matter most when they appear repeatedly or in food areas.
Those signs show that rodents are active nearby even if you do not see them in person.
Damage also matters if it suggests an active path, such as openings near pipes, cabinets, or dumpsters.
If the evidence is on shared property or a business site, your report may lead to a quicker inspection.
How To Gather Details Safely
Do not touch droppings, dead rodents, or nesting material with bare hands.
Keep pets and children away from the area, and use your phone camera from a safe distance if you need to document the problem.
If you are a tenant, note when you notified your landlord or property manager.
A written record helps if you need to show that you reported the issue and it was not addressed.
Who To Contact Based On Where You Saw The Problem

Where you report depends on whether the problem is in a home, rental, business, or public place.
In many cases, local health departments handle rats and other rodents, while property owners or managers may also need to act.
Private Homes And Residential Buildings
If you find rats in your own house, call your local health department first.
Many cities treat residential rodent complaints through environmental health or vector-control offices, and some allow online reports.
If the issue is inside a condo or co-op, you may also need to contact the building management or board.
When the problem affects shared walls, hallways, or common areas, the property manager may be responsible for next steps.
Rentals And Landlord-Managed Properties
If you rent, tell your landlord or superintendent as soon as you notice the problem.
You should also file a complaint with the local health department if the landlord does not respond quickly enough.
A written notice with photos of rat droppings and damage can help document the issue.
That record matters if the landlord needs to be pressured to inspect, seal entry points, or bring in pest control.
Restaurants, Schools, And Other Businesses
For food service businesses, schools, and similar places, contact the local health department or sanitation office.
These properties can face extra scrutiny because rats and mice can contaminate food, classrooms, storage areas, and waste zones.
If you report a restaurant, include the street address, the exact area where you saw rodents, and whether the problem involved indoor dining, kitchens, loading areas, or dumpsters.
The more specific your report, the easier it is for inspectors to respond.
Public Spaces, Vacant Lots, And Government Property
If you see rats in an alley, park, subway area, vacant lot, or on other public property, report it to the city agency that handles sanitation or public health.
Some cities route these complaints through 311, while others send them to a local environmental health office.
For government-owned property, include landmarks, nearest cross streets, and a clear description of the location.
Public reports may not give you a full case update, but they still help officials spot patterns and respond to rodent activity.
What Happens After You Report It

After you report a rat infestation, an inspector or property representative may check the site, decide what action is needed, and schedule follow-up work.
The response depends on whether the problem is on private property, rental property, or public land.
Inspections, Access, And Follow-Up
Inspectors usually want the exact location, signs of activity, and access to the affected area.
If the issue is inside a home or building, someone may need to be present to let them in.
According to wikiHow’s rat infestation reporting guide, health department inspectors often determine whether extermination, cleanup, or repairs are needed after the visit.
If the complaint involves public property, you may need to follow up to make sure action happens.
Owner Responsibilities And Possible Enforcement
Property owners must remove harborage, seal openings, clean up waste, and correct conditions that attract rodents.
In rental situations, that often includes repairing holes, cleaning storage areas, and arranging pest control.
If conditions are not fixed, the city may issue violations or require additional correction steps.
In many places, repeated complaints can lead to more inspections or stronger enforcement when the problem keeps coming back.
How To Prevent The Problem From Coming Back

Once you remove the rats, your best defense is removing food, water, and shelter that invite them back.
Small prevention habits make a big difference when you want to prevent rodents from returning.
Food, Trash, And Entry Points
Keep food in sealed containers and clean crumbs from floors, counters, and cabinets.
Make sure trash cans have tight lids, and empty outdoor bins before they overflow.
Seal gaps around pipes, doors, vents, and foundation openings with durable materials that rodents cannot chew through.
The EPA’s rodent infestation prevention guidance also points to droppings, nesting material, and hidden food areas as key warning signs to watch for.
When To Call A Pest Professional
Call a pest professional if you keep seeing signs after cleanup, if rats are entering through hard-to-find openings, or if the problem spreads across walls, attics, or shared spaces.
You may also want help if you cannot safely reach the nesting area or if repairs require more than simple sealing.
Professional treatment is often worth it when the infestation is larger than a single room or unit.
Simple Ways To Prevent Rodents
Keep clutter down, especially cardboard piles, paper stacks, and storage items near walls.
Move firewood away from the house. Do not leave pet food out overnight.
Check for new droppings, gnaw marks, or burrows after cleanup.
Act early if you notice signs of rats returning.