Finding mouse or rat droppings in a home, cabin, garage or business is common. Cleaning them up safely matters, because rodent droppings, urine and nesting materials can carry diseases, including hantavirus. The CDC publishes clear guidance on how to clean up after rodents. This guide summarizes it and explains when professional help makes sense.
Why rodent droppings are a health concern
Some rodents carry hantaviruses, which can cause hantavirus pulmonary syndrome, a rare but serious illness. People become infected mainly by breathing in tiny particles from contaminated droppings, urine, saliva or nesting materials that get stirred into the air. Rodents can also carry other diseases, such as leptospirosis and salmonella. People who clean up after heavy rodent infestations are at higher risk and should take precautions.
What not to do
The CDC advises against sweeping or vacuuming rodent droppings, urine or nesting materials, because doing so can put virus particles into the air where they can be breathed in. Don't touch droppings or dead rodents with bare hands.
Before you start
- Seal up, trap up. Find and seal entry points, and trap rodents, so cleanup isn't undone. The CDC's prevention message is "Seal Up! Trap Up! Clean Up!"
- Ventilate. Open doors and windows and leave the area to air out for at least 30 minutes before cleaning, especially in closed spaces like cabins, sheds and garages.
- Gather supplies: rubber, latex, vinyl or nitrile gloves; a disinfectant labeled as a disinfectant, or a bleach solution mixed as the CDC recommends; paper towels; and plastic bags.
Cleaning droppings and urine
The CDC's wet cleaning method:
- Put on gloves.
- Spray droppings and urine with disinfectant or bleach solution until very wet, and let it soak for the time recommended by the CDC or product label.
- Wipe up with paper towels and place them in a plastic bag.
- Disinfect the area again and wipe.
- Clean the surrounding area, including counters, cabinets, drawers and floors, with disinfectant.
- Bag and seal waste and dispose of it in a covered trash container.
- Remove gloves carefully, and wash your hands with soap and warm water.
Dead rodents and nests
Spray the dead rodent or nest and surrounding area with disinfectant or bleach solution and let it soak. Place the rodent or nesting material in a plastic bag, seal it, place it in a second bag, and dispose of it. Clean the area as above.
Heavy infestations and enclosed spaces
Attics, crawlspaces, cabins closed for the season, barns and outbuildings with heavy infestation present greater risk. The CDC notes that different protective gear is recommended for people cleaning heavy infestations than for routine situations. Professionals use respiratory protection, protective clothing, wet methods and controlled removal of contaminated insulation and materials.
When to call professionals
- Large amounts of droppings or nests
- Infested attics, crawlspaces or HVAC systems
- Insulation saturated with urine and droppings
- Dead rodents in walls or inaccessible areas
- Strong odors
- Sensitive settings, such as food businesses or healthcare facilities
- Anyone in the household at higher risk
Insulation and HVAC
Insulation full of droppings and urine usually can't be cleaned. Professionals remove it with equipment that bags material directly, disinfect the space, and coordinate replacement. Rodents in ductwork require duct cleaning and repair of entry points.
Preventing rodents
- Seal gaps larger than a quarter inch with steel wool, metal flashing or caulk.
- Store food in sealed containers.
- Keep trash in covered containers.
- Remove clutter and nesting materials.
- Keep vegetation and woodpiles away from the house.
- Use snap traps or work with pest control.
A practical example
A family opens a lake cabin in spring and finds droppings in kitchen drawers and a nest under the sink. They open windows and leave for 30 minutes, then wear gloves, spray the droppings and nest with a bleach solution, let it soak, wipe everything up, bag it and disinfect all kitchen surfaces. They seal gaps around plumbing under the sink and set traps. Because droppings also cover the attic insulation, they hire professionals to remove and replace it.
Frequently asked questions
Can I vacuum droppings with a HEPA vacuum?
The CDC advises against vacuuming droppings. Use the wet method.
Is hantavirus common?
Cases are rare, but serious. Take precautions with every cleanup.
What kind of mask should I wear?
For routine small cleanups, the wet method is the main protection. For heavy infestations, professionals use respirators selected for the hazard.
Do I need to throw away food?
Discard food in packages that rodents chewed or contaminated.
Can I wash contaminated clothing?
Wash bedding and clothing that contacted droppings in hot water with detergent, following CDC guidance.
What about droppings in my car?
Ventilate, use the wet method, and replace the cabin air filter if rodents nested in the ventilation system.
Key takeaways
Never sweep or vacuum rodent droppings. Ventilate, wear gloves, soak droppings and nests with disinfectant or bleach solution, wipe up, bag waste, disinfect and wash your hands. Seal entry points and trap rodents. Call professionals for heavy infestations, attics, crawlspaces, insulation and HVAC.
Sources
- CDC: How to Clean Up After Rodents
- CDC: Preventing Hantavirus
- OSHA: 29 CFR 1910.134, Respiratory Protection
This guide is general information. It is not legal, medical, environmental or safety advice. Rules vary by state and locality. For a specific situation, consult the relevant agency or a qualified professional.