Emergency Hygiene Supplies: What to Stock So Illness Does Not Spread

Thinking about emergency hygiene supplies feels less urgent than water or food, right up until the water is off for a week and somebody in the house gets a stomach bug. Then it becomes the only thing that matters, because in a household with no running water, one case becomes five fast.

CDC's archived guidance for evacuation centers says it plainly: people crowded together in places such as evacuation centers are vulnerable to outbreaks of vomiting and diarrhea, and one of the most common causes is norovirus. Your house during a multi-day outage is a small evacuation center. Here is what to stock, and the reasoning behind each piece, so you can adapt it rather than just copy a list.

Why does hygiene matter more after a disaster than during one?

Because the conditions that spread illness arrive after the event, not during it. The water goes off, the toilet stops flushing, people are packed into whichever room is heated or cooled, and hand washing gets harder exactly when it gets more important.

The numbers on hand washing are not small. CDC's own figures say handwashing education reduces the number of people who get sick with diarrhea by 23 to 40 percent, reduces diarrheal illness in people with weakened immune systems by 58 percent, and reduces respiratory illnesses like colds in the general population by 16 to 21 percent. CDC also offers the detail that sticks in your head: a single gram of human feces, about the weight of a paper clip, can contain one trillion germs.

And norovirus specifically is built to exploit exactly this situation. CDC says a sick person can shed billions of virus particles, that it takes only a few particles to make someone sick, and that you can still spread it for two weeks or more after you feel better.

How do you wash your hands when the water is off?

You build a station. CDC's guidance for personal hygiene during an emergency says it directly: if clean tap water is not available, create a temporary handwashing station by using a large water jug.

Oregon State University Extension spells out the full setup: a jug of clean potable water with an on and off spigot, soap, towels, and a catch bucket for the used water. Their practical touch is using paper towels to turn off the spigot, and not reusing the catch-basin water except to dilute urine in the pee bucket.

The washing itself does not change because the plumbing did. CDC's five steps are the same: wet hands with clean running water and apply soap, lather including the backs of your hands, between your fingers and under your nails, scrub for at least 20 seconds, rinse well, and dry with a clean towel or an air dryer. Hum Happy Birthday from beginning to end twice if you need a timer.

When does hand sanitizer not work?

Against the three things most likely to go around your house, and whenever your hands are actually dirty. This is the part of the list people get wrong, because sanitizer is easy and soap is a hassle when the water is off.

CDC's guidance on hand sanitizer names them specifically. Soap and water are more effective than sanitizer at removing norovirus, Cryptosporidium, and Clostridioides difficile. CDC adds that sanitizers may not be as effective when hands are visibly dirty or greasy, and that they might not remove harmful chemicals such as pesticides or heavy metals like lead.

CDC's norovirus page is even blunter: hand sanitizer does not work well against norovirus, and it is not a substitute for handwashing.

So the honest way to hold both facts at once: sanitizer is a real fallback for general hand hygiene when soap and water are not available, and it is close to useless against the one pathogen most likely to tear through a shelter or a crowded household. Stock it, use it when you have to, and do not let it replace the washing station.

If you do buy it, the spec is at least 60 percent alcohol. CDC notes studies found an alcohol concentration between 60 and 95 percent works better, and that products below that band merely reduce the growth of germs rather than kill them outright. Use enough to cover all surfaces of your hands and rub until dry, about 20 seconds. Do not rinse or wipe it off early, and supervise young children so they do not swallow it.

How much water do you need for hygiene?

Plan on one gallon per person per day, and understand that it is a floor, not a comfortable figure.

Ready.gov's kit list says water, one gallon per person per day for several days, for drinking and sanitation. CDC says store at least 1 gallon of water per person per day for 3 days, and try to store a two-week supply if possible. Oregon State Extension puts the same number in household terms: for the recommended two weeks, plan to store 14 gallons per person and pet. If you plan to stretch stored water with a tank or barrel, read up on rainwater filtration methods first, because roof water is not hygiene water until it is treated.

Two honest caveats worth knowing:

• No federal source publishes a drinking versus hygiene split. The familiar "two quarts to drink, two quarts to wash" line shows up in old documents, but Ready.gov, CDC and Red Cross all give one combined gallon today. Ready.gov does say a normally active person needs about three quarters of a gallon of fluid daily, which tells you roughly where the rest goes.

• One gallon is a survival minimum, not a standard of living. The World Health Organization's emergency technical note puts survival drinking and food at 2.5 to 3 liters per person per day, basic hygiene at 2 to 6 liters, and basic cooking at 3 to 6 liters, for a total of 7.5 to 15 liters, which is roughly 2 to 4 gallons. Oregon State Extension says the same thing in plain English: the one-gallon minimum will not go far once you include hydration, sanitation, cooking and cleaning.

Store more if you can, and store more for anyone who is pregnant, nursing, sick, or living somewhere hot. Ready.gov notes water needs can double in very hot temperatures. CDC says replace stored water every six months.

What do you do when the toilet will not flush?

You go to a twin-bucket system, and you do it before the situation gets unpleasant rather than after.

Oregon State University Extension's sanitation guide is the most practical published treatment I have read on this, so I will stay close to it. The setup is two five-gallon buckets, marked for urine and for feces. The urine bucket stays unlined. The feces bucket is lined with a heavy-duty 13-gallon black bag at a thickness of 3 to 5 mil.

Why separate them? Oregon State's reasoning is the useful part: urine has volume and odor but is generally sterile, while feces carries the pathogens. Keeping them apart makes the waste easier to store and dispose of. Try not to pee in the poo bucket.

The operating rules:

• Cover every use with about half a cup of carbon material, enough to completely cover the surface. Wood shavings, sawdust, shredded paper, bark chips or peat moss all work.

• Lid discipline. The urine bucket needs a lid that closes well. The feces bucket gets the seat put back down, but not an airtight seal.

• Urine disposal: when the bucket is about a quarter full, dilute it with water if you can and pour it on the lawn or ground, changing locations each time.

• Feces disposal: fill the bucket no more than half full. Wear disposable gloves, double-bag, seal, and store it separately from other garbage and far away from your food and water. Do not put human waste in the normal garbage, and keep it secure from pets, flies and rats.

• Burial distance: do not bury waste within 100 feet of a water source, or anywhere contaminants can leach downhill into one. CDC's post-disaster guidance uses the same 100 foot figure for washing yourself, children, diapers and clothes away from drinking water sources.

Oregon State's comfort trick is worth copying: a pool noodle cut in half and sliced down the long side makes a serviceable seat on a bucket rim.

What is the right bleach ratio for disinfecting?

There is no single right ratio, and that is the most useful thing to know about bleach. CDC publishes at least five different dilutions depending on the job:

• Food-contact surfaces that may have touched floodwater: 1 tablespoon of bleach per 1 gallon of water.

• General household surface disinfection: 5 tablespoons, a third of a cup, per gallon of room temperature water, or 4 teaspoons per quart. Leave the solution on the surface at least 1 minute, and keep the surface visibly wet during that contact time.

• Household items and surfaces that touched floodwater: 1 cup per 5 gallons of water.

• Mold on hard surfaces: 1 cup per 1 gallon of water.

• Vomit and diarrhea cleanup: 5 to 25 tablespoons per gallon, which CDC equates to 1,000 to 5,000 ppm, with at least 5 minutes of contact time.

Four rules that apply to all of them. Use regular unscented bleach containing 5 to 9 percent sodium hypochlorite, not scented or color-safe versions. Never mix bleach with ammonia or any other cleaner. Never use bleach in a closed space, and open windows and doors first. And make a new diluted solution daily, because CDC says bleach solutions will not be as effective after being mixed with water for more than 24 hours.

One more from CDC that people skip: cleaning and disinfecting are two different steps. Cleaning with water, soap and scrubbing removes germs and dirt. Disinfecting kills what is left. CDC's norovirus guidance makes the consequence explicit, that vomit or stool must be cleaned up before disinfecting or the disinfectant will not work.

On shelf life, I will be straight with you about what is and is not sourced. EPA's emergency disinfection guidance says to locate fresh liquid chlorine bleach, or bleach stored at room temperature for less than one year. That is the only authoritative shelf-life statement I could find. The widely repeated "bleach goes bad in 6 to 12 months" figure does not appear on any CDC or EPA page I could verify, so treat annual rotation as a reasonable habit rather than an official rule.

What about disinfecting drinking water?

Different job, much smaller dose, and worth keeping mentally separate from surface cleaning.

CDC's figures for unscented household bleach at 5 to 9 percent sodium hypochlorite: 2 drops per quart, 8 drops per gallon, 40 drops, about half a teaspoon, per 5 gallons. If the water is cloudy, murky, colored or very cold, double it. Let the water stand at least 30 minutes before drinking. EPA's table matches at 8 drops per gallon for 6 percent bleach, and gives 6 drops per gallon for 8.25 percent.

Boiling is simpler when you have fuel: CDC says bring clear water to a rolling boil for 1 minute, or 3 minutes above 6,500 feet. EPA sets its three-minute threshold lower, at 5,000 feet. If you are near either line, use the more cautious one. Having the fuel is the catch, which is why a set of portable cooking gear belongs with the hygiene supplies.

Note that some extension services give roughly double CDC's dose, at 16 drops per gallon. When sources disagree on a safety figure, I use the federal one.

What hygiene supplies do most lists leave out?

Three categories, and all three are the kind of thing you only notice is missing at the worst moment.

Period supplies. CDC publishes a fact sheet on managing your period during a disaster, and its kit guidance is concrete: period products for 2 cycles, soap, hand wipes or hand sanitizer, clean underwear, and snacks or comfort items. CDC says to change tampons every 4 to 8 hours and never wear a single tampon more than 8 hours, to change any product every few hours regardless of how light the flow, and to wash hands with soap and clean running water before and after. Used products get wrapped in toilet paper, a tissue or a bag and thrown in the trash, never flushed and never reused. Reusable products are washed with soap and water safe enough to drink, and must be completely dry before storing.

Infant feeding hygiene. CDC's emergency toolkit is specific here, because a bottle is a harder problem than a plate. Wash hands with soap and water or sanitizer with at least 60 percent alcohol. Use water that has not been used for anything else, and in most emergencies bottled water is safest for cleaning. Wash items in a dedicated basin with safe water and dish soap, pushing soapy water through nipples and spouts, then rinse with safe water. If the baby is under 2 months old or is sick, sanitize at least once a day by boiling for 5 minutes, or by adding 1 teaspoon of bleach per half gallon of water and soaking for 2 minutes. Do not rinse sanitized items, air dry them. If safe water and soap are not available, use disposable feeding supplies. Throw away any nipple or pacifier that touched floodwater. One critical note from CDC: water with harmful chemicals, toxins or radioactive material cannot be made safe by boiling or adding bleach.

Wound hygiene after flood exposure. CDC says open wounds and rashes exposed to contaminated water can become infected. Avoid contact with floodwater, salt water or brackish water if you have an open wound. Keep open wounds as clean as possible by washing well with soap and clean water, cover clean open wounds with a waterproof bandage, and seek immediate medical care if a wound develops redness, swelling or oozing. Waterproof bandages, gauze and tape belong in the same tote, and you can put that together cheaply with affordable first aid supplies.

What should the actual supply list look like?

Pulling the sourced pieces together, here is the list I would build, in rough priority order:

1. The washing station: a water jug with an on and off spigot, bar or liquid soap, a catch bucket, paper towels or clean cloth towels.

2. Water: 1 gallon per person per day minimum, two weeks if you have the space, more for anyone sick, pregnant or in heat.

3. Toilet: two 5-gallon buckets with lids, several boxes of 3 to 5 mil contractor bags, a sack of wood shavings or sawdust, a scoop, toilet paper, closable bags for used paper, a seat or a split pool noodle, and a privacy screen or tarp.

4. Gloves: latex or nitrile, for bagging waste and handling anything contaminated.

5. Bleach: regular unscented, 5 to 9 percent sodium hypochlorite, rotated annually, plus measuring spoons and a labeled spray bottle for the daily mixed solution.

6. Hand sanitizer: at least 60 percent alcohol, as the backup to the station.

7. Moist towelettes and disinfecting wipes, which Ready.gov lists for personal sanitation and surface disinfection.

8. Period supplies for two cycles, plus clean underwear.

9. Infant supplies: formula, bottles, diapers, wipes, diaper rash cream, and disposable feeding supplies as a backup.

10. Garbage bags and plastic ties for everything else, which Ready.gov also lists under personal sanitation.

One behavioral item that costs nothing and matters more than most of the list: CDC says do not prepare food, handle food, or care for others while sick, and to wait at least 2 days, 48 hours, after symptoms stop. In a crowded house that one rule does more than any product on this list.

Frequently asked questions

How long should you wash your hands?
At least 20 seconds, per CDC. Wet your hands with clean running water, apply soap, lather the backs of your hands, between your fingers and under your nails, scrub for at least 20 seconds, rinse well, and dry with a clean towel or air dryer. CDC suggests humming Happy Birthday twice as a timer.

Does hand sanitizer work as well as soap and water?
No. CDC says washing with soap and water is the best way to get rid of germs in most situations. Sanitizer with at least 60 percent alcohol is the fallback when soap and water are not available, and CDC specifically notes it works poorly against norovirus, Cryptosporidium and Clostridioides difficile, and on visibly dirty or greasy hands.

How much water do you need per person per day for hygiene?
FEMA and Ready.gov recommend storing at least one gallon per person per day for drinking and sanitation combined, for several days. CDC recommends at least one gallon per person per day for three days and a two-week supply if possible. Neither publishes a split between drinking and hygiene.

What do you do when the toilet will not flush?
Oregon State University Extension recommends a twin-bucket system: two five-gallon buckets, one for urine and one for feces. Line the feces bucket with a heavy 3 to 5 mil bag, cover each use with about half a cup of carbon material such as wood shavings or sawdust, and fill it no more than half full before double-bagging and sealing it.

What is the right bleach-to-water ratio for disinfecting surfaces?
There is no single ratio. CDC gives 1 tablespoon per gallon for food-contact surfaces exposed to floodwater, 5 tablespoons per gallon for general household disinfection with at least 1 minute of wet contact time, 1 cup per 5 gallons for items that touched floodwater, and 1 cup per gallon for mold on hard surfaces. Mix a fresh solution daily.

How far from a water source should you bury human waste?
At least 100 feet, per Oregon State University Extension, and not anywhere contaminants could leach downhill into one. CDC uses the same 100 foot figure for washing yourself, your children, diapers and clothes away from drinking water sources after a disaster.

None of this is expensive, and most of it fits in one tote in the garage. Buy the jug with the spigot this week, and the rest can come together over a month. You never know, but you can always be ready.

Sources: CDC, About Handwashing · CDC, Handwashing Facts · CDC, Hand Sanitizer Guidelines and Recommendations · CDC, How to Prevent Norovirus · CDC, How Norovirus Spreads · CDC, Guidelines for Personal Hygiene During an Emergency · CDC, Preventing Diarrheal Illness After a Disaster · CDC, How to Make Water Safe in an Emergency · CDC, How to Create an Emergency Water Supply · CDC, Cleaning and Disinfecting with Bleach · CDC, How to Safely Clean and Sanitize with Bleach · CDC, How to Clean Infant Feeding Items During Emergencies · EPA, Emergency Disinfection of Drinking Water · FEMA Ready.gov, Build A Kit · FEMA Ready.gov, Water · Oregon State University Extension, Survival Basics: Sanitation and Waste Management · Oregon State University Extension, Survival Basics: Water · World Health Organization, How Much Water Is Needed in Emergencies