Emergency Toilet for Power and Water Outages: Flush or Bag It

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Updated: November 12, 2026

Short answer: If the water is off but the sewer still works, you can flush by pouring 1 to 2 gallons of water straight into the bowl. If the sewer is down, or the power is out and your waste has to be pumped anywhere, don't flush at all. Every flush can push sewage back up into your house. Instead, line the toilet or a 5-gallon bucket with heavy-duty bags, cover each use with something dry like sawdust, tie the bags off, and store them away from people, pets, and food until your local officials say how to get rid of them. Wash hands with soap and water every time, or use hand sanitizer that's 60% alcohol or stronger.

The hard part isn't building the toilet. It's knowing which situation you're in. Figure that out first.

Step 1: Figure out what actually failed

What's out	Can you flush?	What to do
Town water off, sewer working	Yes, with a bucket of water poured in the bowl	Bucket flush with stored, non-drinking water
Power out, home on public sewer	Only when you have to	Your neighborhood sewer pump station may be out too. Keep water use low
Sewer outage announced	No	Bag or bucket toilet until officials say flushing is OK
Power out, home has a grinder pump, sewage ejector, or pumped septic system	No, or as little as possible	Those pumps stop without power. Use a bag or bucket toilet
Power out, private well	Not from the plumbing	The well pump is down. Use stored water, and see the well section below
Toilet won't drain or sewage backs up	Stop	Don't flush again. Switch to a bag or bucket toilet

Perfect world: Your water or sewer utility tells you exactly what to do, and you follow it. SHTF: Nobody's giving instructions, phones are spotty, and you have to decide for yourself. When you don't know whether the sewer is working, assume it isn't. A bucket toilet costs you some inconvenience. A sewage backup in the house costs you far more.

Bucket flushing: making the toilet work with no running water

This works when your water is off but the sewer line is still working.

1. Fill a bucket with 1 to 2 gallons of water. The amount varies by toilet. Only carry what you can lift safely.
2. Pour it into the bowl. Start steady, then pour faster. The rush of water is what starts the flush.
3. If the water rises instead of draining, stop pouring, and stop using that toilet until it drains normally.
4. Add a little more water slowly to refill the bowl to its normal level.

Use non-drinking water for this, like bathtub water or collected rainwater. Keep grease, food bits, wipes, and cleaners out of it. Here's why that matters. Ready.gov's planning number is one gallon a day for each person, and that's for drinking and sanitation. One bucket flush uses 1 to 2 gallons. Flushing with your drinking water will burn through your supply in a hurry. Fill the tub before a storm and save it for flushing. I covered how in bathtub water storage before a storm.

Flush only when you need to, especially if your neighborhood relies on a sewer pump station that's down.

When NOT to flush

Don't flush if:

• Your utility announces a sewer outage. County emergency guidance is blunt: flushing during a sewer outage can back sewage up into your home.
• The power is out and your neighborhood sewer depends on pump stations. Many towns use lift stations to move sewage uphill. When the power goes out in your area, the station serving your street is likely out too, and not every one has a backup generator. Their storage fills up, and the overflow can end up in streets and homes.
• Your home has a grinder pump or other sewage pump. It won't run without power, and using water can push sewage back into your house.
• You're on a septic system with a pump. Without power, parts of the system can't work. One county health department says to cut water use way down, skip flushing every time someone pees, and turn off the septic pump breaker during the outage so it doesn't kick on unexpectedly when power returns. After the power comes back, follow your system's reset steps.
• The toilet won't drain or sewage is backing up. Stop using water and switch to a bag toilet.

One more thing utilities point out that most people miss: sewer pump stations don't always come back on at the same time homes do. Right after your lights come back, hold off on laundry, dishwashing, and long showers. Drain a full bathtub a little at a time instead of all at once.

Why well homes lose water when the power goes out

Your well pump runs on electricity. When the power goes, the pump stops, and you're down to whatever's left in the pressure tank and pipes. That's a small amount.

Canada's federal health department tells well owners not to open faucets, take showers, or flush toilets during an outage. The pressure in your system is what keeps contaminants out, and using water while the power is out drops that pressure and raises the risk of contamination. If your system loses all its pressure, or nothing comes out of the taps, get the water tested before you drink it again. When power returns, run the taps for a few minutes to flush out stagnant water.

So if you're on a well:

• Close the supply valve on the toilet before you start bucket flushing, so the tank doesn't refill from your pressure tank.
• Flush with stored water poured into the bowl, as above, if your waste system can take it. Septic with a pump? See the section above.
• Keep a separate supply of drinking water. Don't count on the pressure tank.

Generator for the well pump. A licensed electrician, well contractor, or your power company should size it. Run any generator outdoors only, at least 20 feet from windows, doors, and attached garages, and put battery-backup carbon monoxide alarms on every level of your home.

Never connect a generator to your house wiring unless a licensed electrician has installed a transfer switch. Plug appliances into the generator with heavy-duty extension cords instead. State utility regulators warn that a generator wired straight into a house can backfeed onto the power lines, where the transformer steps it up to thousands of volts. That's enough to kill a utility worker making repairs far from your house.

If you're looking at a battery power station instead of a generator, see how long a power station could run your pump with the well pump runtime calculator. Hooking a well pump to any backup power source is still a job for a licensed electrician.

The bag-in-the-bowl toilet (fastest setup)

This uses the toilet you already have.

1. Shut off the toilet's supply valve.
2. Flush or bail out the water left in the bowl so it stays empty.
3. Lift the seat. Line the bowl with one heavy-duty garbage bag inside another, then lower the seat to hold them.
4. Put a layer of absorbent material in the inner bag.
5. Use it. Add more absorbent material after each use.
6. When the inner bag fills up or starts to smell, tie it off, put in a fresh inner bag, and add more absorbent.
7. Store the tied bags safely (see below).
8. Wash your hands.

Low-cost beginner setup: a box of heavy-duty kitchen or contractor bags, a bag of sawdust, wood stove pellets, or peat moss, a pair of disposable gloves, and hand sanitizer. You can put that together in one trip to the store and keep it in the bathroom closet. If you'd rather have bags made for the job, Double Doodie toilet waste bags are one ready-made option.

The 5-gallon bucket toilet

Same idea, but portable. It's a good choice if your bathroom is unusable or you want a second toilet.

• Use a sturdy 5-gallon bucket that can hold an adult's weight. It doesn't need to be food grade.
• Add a snap-on bucket toilet seat, or set a regular toilet seat on top. A ready-made bucket toilet like the Reliance Luggable Loo comes with the seat and lid already on it. Use a seat that's hard and wipeable. Skip foam pool noodles. They soak up germs and can't be cleaned.
• Line it with heavy-duty bags and set it up like the bag-in-the-bowl method.

The twin-bucket system (the better long-outage setup)

If you might be without a toilet for more than a few days, separate pee from poo. This method came out of Christchurch, New Zealand, after the earthquake there in February 2011, and Portland-area emergency managers built their public guidance around it.

Why it works: Pee is mostly volume. Poo carries most of the germs. Mix them and you get a heavy, sloshing bucket of germs that smells awful. Keep them apart and the poo dries out and shrinks, and the pee is easy to get rid of.

Set it up:

• Two sturdy 5- or 6-gallon buckets. Mark one PEE and one POO in big letters so everyone in the house, kids included, knows which is which.
• One or two seats. Plenty of people prefer to sit to pee too.
• Heavy-duty bags for the poo bucket. Guidance calls for 13-gallon bags, 0.9 mil or thicker, so they don't tear.
• Dry cover material. About a handful after each use. Good choices: sawdust, wood shavings, shredded paper, bark chips (skip cedar), dried leaves, grass clippings that have dried out, or peat moss.

Using the pee bucket:

• Toilet paper goes in the poo bucket, never the pee bucket.
• Dilute the pee with water if you can and pour it on a lawn, garden, or bare ground. Use a different spot each time. Watch for local instructions, since some areas may set up other options.

Using the poo bucket:

• Line it with a bag. Toilet paper can go in here.
• Cover each deposit with a handful of dry material to cut smell and keep flies away.
• Don't fill it more than halfway. Then tie the bag and put it inside a second bag.
• Agencies differ on lids. Some county guides call for a tight lid between uses to hold in smell and keep bugs out. The Portland-area guidebook says not to seal the poo bucket airtight while it's in use, since airflow helps the waste dry. A lid that keeps flies, pets, and kids out without sealing airtight covers both.

If someone can't separate, kids especially, do your best. Add a little extra cover material when pee ends up in the poo bucket.

Cheap cover material trick: wood pellets sold for pellet stoves. Mix about 1 cup of water into 2 cups of pellets and they break down into roughly 6 cups of sawdust. Plan that extra water into your storage.

Pick your disposal plan first, then your cover material

This is where official advice conflicts, and it trips people up.

• Plan A: Bag it and hold it. Some guides list cat litter, sawdust, peat moss, or fireplace ashes as absorbents for bagged waste. You tie the bags off and store them.
• Plan B: Dump it in the toilet when the sewer comes back. One Florida county tells residents to skip cat litter for exactly this reason: litter can't be flushed once the sewer is running again.

My take: bag it. Dumping a bucket of waste into a toilet means splashing, and the Portland-area guidebook calls that a bad idea for that reason. If you bag, any of the absorbents above work. If you do plan to dump into a working toilet later, skip cat litter and use plain sawdust or paper.

How to store waste bags safely

• Double-bag every bag once it's tied off.
• Keep the bags together in their own lidded container, like a spare trash can, along with soiled diapers and pet waste. A garage, shed, or outbuilding works well.
• Keep them away from food, water, kids, pets, flies, and rats.
• Don't put them out with regular trash unless officials say to. Agencies differ here too. One state health department suggests holding bags in the garbage can for disposal. A county health department says they can go in regular garbage only if officials announce it during a declared emergency. The Portland-area guidebook says to keep them out of garbage and recycling carts altogether, because compaction tears the bags and puts sanitation workers at risk. Hold them in a separate can until your local officials tell you what to do.
• Don't bury plastic bags. Plastic keeps the waste from breaking down.
• Feminine hygiene products can go in the poo bucket.
• Wash your hands every time you handle a bag.

How much will pile up? Oregon's state emergency management office says to plan for about 5 gallons of waste per person per week. By my math, that's about 40 gallons for a family of four over two weeks. Plan your bag supply and storage space around that.

Never mix bleach with urine

Some emergency guides tell you to use household bleach as a disinfectant in the bucket. Be careful with that. Urine contains ammonia, and bleach mixed with ammonia gives off chloramine gas. It can cause coughing, shortness of breath, chest pain, watery eyes, and in bad cases fluid in the lungs. Never pour bleach into a pee bucket, a bag with urine in it, or a toilet bowl with urine in it.

Use bleach only to clean an empty bucket or seat after rinsing it with water, mixed with plain water only (one county's guide uses 9 parts water to 1 part bleach for cleaning). Do it with the window open. Never mix bleach with any other cleaner. If you get a whiff and start coughing, get to fresh air. Call 911 for trouble breathing, or Poison Help at 1-800-222-1222 for milder symptoms.

Set up a handwashing station

Germs from an emergency toilet end up on hands, then on food. CDC says to scrub with soap and water for 20 seconds or longer. If you don't have clean running water, CDC suggests setting up a temporary station with a large water jug.

Simple setup (adapted from a county health department's spec):

• A water container of 5 gallons or more with a spigot that gives a steady flow
• Liquid soap in a pump bottle
• Paper towels
• A 5-gallon bucket under the spigot to catch the dirty water. Empty it before it gets heavy

Set it on a counter or table right next to the toilet so nobody skips it.

If you don't have soap and water, use hand sanitizer that's 60% alcohol or stronger. A gallon pump bottle such as Sanit hand sanitizer gel is listed by its maker at 70% ethyl alcohol. It doesn't kill every germ, and it doesn't work well on hands that are visibly dirty or greasy. Wipe off the grime first.

During a boil water advisory, CDC says washing hands with tap water may be safe. Follow your local notice. I go through the rest of a boil notice in boil water notice: what to do first.

What to stock

Item	Why	How much
Two sturdy 5-gallon buckets	Bucket or twin-bucket toilet	2 per household, plus lids
Bucket toilet seat (hard plastic)	Comfort and cleanability	1 or 2
Heavy-duty 13-gallon bags, 0.9 mil or thicker	Liners and double-bagging	A full box or more (see the 5 gallons per person per week planning figure)
Dry cover material	Smell, flies, drying	A handful per use. Sawdust, pellets, shredded paper, or peat moss
Toilet paper	Obvious	More than you think
Disposable gloves	Changing bags	A box
Hand soap	Handwashing	Several bottles
Hand sanitizer, 60%+ alcohol	When water is short	At least one large pump bottle
Water jug with spigot, plus catch bucket	Handwashing station	1 set
Paper towels	Drying hands	Several rolls
Moist towelettes, garbage bags, plastic ties	Ready.gov's basic sanitation items	Part of your kit
Unscented household bleach	Cleaning empty buckets and surfaces only	1 bottle, stored away from urine and other cleaners
Spare lidded trash can	Holding tied bags	1
Stored non-drinking water	Bucket flushing when the sewer works	1 to 2 gallons per flush

For the rest of your outage kit, see my emergency preparedness checklist.

Renters and apartments

• You don't control the building's water or sewer. If the building loses water pressure or management says to stop flushing, you need a bag toilet kit ready no matter what floor you're on.
• Ask management before an outage whether your building's sewage gets pumped and whether they'll tell residents to stop flushing.
• No yard for pee or a latrine? Use the bag toilet or twin buckets, keep the pee bucket covered, and follow local instructions for disposal. Don't dig holes in shared ground.
• Storage is tight. A single lidded trash can on a balcony or in a storage closet away from food keeps tied bags contained. Twin buckets help here, since separated, covered waste takes up less space and smells less.
• Talk to your neighbors. Guidance from Portland-area emergency managers encourages neighbors to agree on shared collection spots. Better to plan that before the outage than to argue about it during one.

Medical needs come first

If anyone in your home depends on powered medical equipment, it's worth calling your electric utility to ask about their medical priority list for outages. That list is for people with proper medical documentation, and the utility may ask you to prove it. It's also a good idea to talk with your doctor about a backup plan for that equipment and any medicine that needs refrigeration. Sanitation matters, but this matters more.

Questions people ask

Will my toilet flush when the power is out? If water still comes out of your taps and your sewer is working, yes. If the water pressure is gone, pour 1 to 2 gallons into the bowl. If your waste gets pumped anywhere, whether that's a lift station, a grinder pump, or a pumped septic system, keep flushing to a minimum or stop.

How much water does a bucket flush take? Utilities put it at 1 to 2 gallons poured directly into the bowl in most cases. The amount varies by toilet.

Should I pour water in the tank or the bowl? The bowl is simpler: pour steady, then faster, and the toilet flushes on its own. Refilling the tank also works on a standard gravity-fed toilet. Close the supply valve first, lift the heavy lid with both hands, fill to the marked line below the overflow tube, then use the handle. If the tank has a sealed pressure unit inside, stick to the bowl.

Can I use cat litter in a bucket toilet? Yes, if you're bagging the waste and holding it. No, if you plan to dump the contents into a toilet once the sewer comes back. Litter can't be flushed.

Can I put bleach in my bucket toilet? Not if there's urine in it. Bleach plus the ammonia in urine makes chloramine gas. Use dry cover material for odor, and save bleach for cleaning empty buckets.

Can I just dig a hole outside? Only as a last resort for a day or two. Washington's health department says to dig 100 feet or more away from any well, house, or open water, make the hole 6 inches or deeper, and use each hole once. If you're in town or renting, use the bag or bucket method.