Norovirus is one of the hardest common viruses to kill on household surfaces. It can survive on hard surfaces like countertops and doorknobs for more than two weeks, and on soft surfaces like carpet and upholstery for up to a week. Standard household cleaners and alcohol-based products won’t reliably destroy it. Cleaning up after norovirus requires a specific approach: the right disinfectant, the right concentration, and attention to every surface the sick person touched.
Why Regular Cleaning Products Don’t Work
Norovirus is a non-enveloped virus, which means it lacks the fatty outer coating that makes many other germs vulnerable to alcohol and standard disinfectant sprays. This is why alcohol-based hand sanitizers are not effective against norovirus, and why many all-purpose cleaning sprays won’t eliminate it from surfaces. You need either chlorine bleach at the right concentration or a product specifically registered by the EPA as effective against norovirus.
The Disinfectant That Works Best
Chlorine bleach is the most reliable and affordable option. The CDC recommends a solution of 5 to 25 tablespoons of standard household bleach (5% to 8% sodium hypochlorite) per gallon of water. That works out to roughly one-third cup to one and a half cups per gallon, depending on how contaminated the area is. For a surface where someone vomited or had a diarrhea accident, use the stronger end of that range.
If you prefer not to use bleach, look for products on the EPA’s “List G,” a registry of disinfectants with lab-tested effectiveness against norovirus. These include products based on hydrogen peroxide, hypochlorous acid, and certain quaternary ammonium compounds. Check the label for a norovirus or “feline calicivirus” claim, since feline calicivirus is the standard test surrogate for norovirus in lab settings.
Protect Yourself Before You Start
Norovirus is extraordinarily contagious. As few as 18 viral particles can cause infection, and a single episode of vomiting can release billions. Before you begin cleaning, put on disposable gloves and a disposable gown or old clothes you can wash immediately afterward. If you’re cleaning up vomit or liquid stool, wear a surgical mask and eye protection. Vomit can generate tiny airborne droplets that carry the virus, and splashes during cleanup are a common route of infection.
Keep other household members, especially children, out of the area while you clean.
How to Clean Up Vomit or Stool
The order of operations matters here. Disinfectant can’t penetrate through organic material, so you need to physically remove the mess before you disinfect.
- Contain the area. Use paper towels or disposable cloths to carefully blot and scoop up as much solid and liquid material as possible. Don’t scrub or wipe aggressively, which can push the virus into porous surfaces or send particles into the air.
- Bag the waste. Place all soiled paper towels and disposable cloths into a plastic bag, tie it shut, and put it directly in the outdoor trash.
- Apply your disinfectant. Soak the entire affected area with your bleach solution or List G product. Extend several feet beyond the visible spill, since microscopic droplets spread further than you’d expect.
- Let it sit. Leave the disinfectant on the surface for at least 10 minutes. This contact time is essential. Spraying and immediately wiping does very little.
- Wipe and dry. After the contact time, wipe the surface clean with fresh paper towels and dispose of them in a sealed bag.
For kitchen counters and other food-contact surfaces, rinse thoroughly with clean water after the bleach has done its work.
Hard Surfaces Throughout the House
After the visible mess is handled, you still need to disinfect every hard surface the sick person may have touched during their illness. Norovirus patients shed the virus before symptoms start and for days after they feel better, so the contamination zone is larger than you might think.
Prioritize these areas: toilet handles and seats, bathroom faucets, light switches, door handles, refrigerator handles, remote controls, phones, and cabinet pulls. Wipe each surface with your bleach solution or List G product, allow the full contact time listed on the label, then wipe dry. Do this daily while someone in the household is symptomatic, and for at least two to three days after symptoms resolve.
Carpet, Upholstery, and Soft Surfaces
Soft surfaces are trickier because bleach will damage or discolor most fabrics. Steam cleaning is the most effective alternative. Norovirus is completely inactivated at 158°F held for 5 minutes, or at 212°F for just 1 minute. Most commercial-grade steam cleaners reach these temperatures, but check your machine’s specs to be sure.
If you don’t have a steam cleaner, remove any solid matter, then apply a List G disinfectant that’s labeled safe for fabric. Allow the full contact time. For carpet that took a direct hit, professional steam cleaning is worth the cost, since the virus can persist in carpet fibers for days and re-enter the air when people walk over the spot.
Laundry
Sheets, towels, pajamas, and any clothing that came in contact with vomit or stool need careful handling. Wear gloves while gathering contaminated laundry. Don’t shake the items, since that sends viral particles airborne. Place them directly into the washing machine.
Wash on the hottest setting the fabric allows, using regular detergent plus a half-cup of chlorine bleach for whites and bleach-safe colors. For items that can’t tolerate bleach, the combination of hot water and a full dryer cycle on high heat provides meaningful disinfection, since the heat helps inactivate the virus. Wash contaminated laundry separately from the rest of the household’s clothes, and run an empty hot cycle afterward to clean the machine drum.
Hand Hygiene During and After Cleanup
Even with gloves on, wash your hands thoroughly with soap and water for at least 20 seconds after removing them. This is one situation where hand sanitizer is genuinely not a substitute. Alcohol-based sanitizers do not reliably kill norovirus. The physical friction of handwashing, combined with soap’s ability to lift viral particles off skin, is what makes it effective.
Everyone in the household should wash their hands with soap and water after using the bathroom, before eating, and after touching shared surfaces for the duration of the illness and several days beyond.
How Long to Keep Cleaning
People with norovirus can shed the virus in their stool for two weeks or more after symptoms stop. The highest risk of spreading is during active illness and the first 48 hours after symptoms resolve, but continued attention to bathroom hygiene and surface disinfection for at least a week after recovery reduces the chance of passing the virus to other household members. If multiple people in the home get sick in sequence, restart your cleaning timeline with each new case.