Key takeaways
- Household: 4 people, 7-day plan.
- Total uses: 4 people x 5 uses x 7 days = 140 uses.
- Bag system: if you change the bag after every 2 to 3 uses, plan on 50 to 70 bags, plus one or two spare rolls. Cleanwaste and Reliance both sell bag-and-absorbent packs sized in these quantities.
- Flush system: a flush typically uses about 0.5 to 1 gallon from the fresh tank. At 70 flushes, you need roughly 35 to 70 gallons of water set aside for flushing alone, and the waste tank (5.5 gal) will need emptying about every 1 to 2 days for four people.
The best emergency portable toilet for most households is a flushing-style unit such as the Thetford Porta Potti 365 or 565E if you have water to spare, and a five-gallon bucket toilet such as the Reliance Luggable Loo if you want the cheapest, simplest, longest-lasting option. Both work when the water and sewer stop, but they solve different problems: the Porta Potti holds waste in a sealed tank, while the bucket system relies on liner bags and absorbent that you stock in advance.
After a hurricane, flood, ice storm or earthquake, a toilet that cannot flush is one of the first real hardships. Public guidance, including advice from the CDC, is to switch to a portable camping toilet or a sturdy bag-lined bucket if your sewer or water supply fails. This guide compares the main types, shows you how to calculate how many bags or flushes you need, and ends with a decision matrix so you can match a unit to your household.
Quick Comparison of the Best Emergency Portable Toilets
| Pick | Best for | Key specs | Price range |
|---|---|---|---|
| Thetford Porta Potti 565E Curve | Best overall for families | Piston flush, sealed waste tank of about 5.5 gal, rechargeable-battery or manual flush options | Premium |
| Thetford Porta Potti 365 | Best flushing value | About 5.5 gal waste tank, about 5 gal fresh water, roughly 40 lb when full of water | Mid-range |
| Thetford Porta Potti 135 | Best compact flush unit | About 2.6 gal waste tank, manual bellows flush, around 7 lb empty | Mid-range |
| Reliance Luggable Loo | Best budget emergency toilet | 5-gal bucket, snap-on seat and lid, about 3 lb, no water needed | Budget |
| Camco Premium Portable Travel Toilet | Best low-cost flush toilet | About 5.3 gal total capacity, hold-down latch, built-in carry handle | Budget |
| Cleanwaste Go Anywhere Toilet Kit | Best for go-bags and tight storage | Folds flat, uses gelling-powder waste bags, minimal weight | Budget |
Specifications above are approximate and based on the manufacturers’ published listings; capacities and weights vary slightly between production runs, so confirm against the spec sheet before you buy.
Best Overall: Thetford Porta Potti 565E Curve
The Porta Potti 565E Curve is the most complete emergency toilet for a family that expects to be home for days. It is a two-tank design: a flush-water tank on top and a sealed waste tank underneath, with a piston pump that flushes with a push of a lever. The curved seat sits at a comfortable height, which matters more than it sounds when children, older adults or anyone with sore knees will use it daily.
Its main trade-off is weight and upkeep. A full waste tank is heavy to carry, and you must find a legal place to empty it, typically a sewer cleanout, a dump station or a toilet that still flushes. It also needs holding-tank chemicals or a deodorizing product if you want odor control over several days. Choose it if you have storage space and a plan for disposal.
Best Value Flushing Model: Thetford Porta Potti 365
The Porta Potti 365 uses the same basic concept as the 565E but with a manual piston flush and a simpler body. The waste tank is around 5.5 gallons, which is the number that matters for planning. It is a sensible middle choice for a household that wants a real seat, a closing lid and a sealed tank without paying for the extras.
The trade-off is the same as every flush-style unit: it needs clean water for each flush, so your stored water has to cover drinking, cooking and flushing. If your water storage is thin, a bag system is the better fit.
Best Compact Flush Unit: Thetford Porta Potti 135
The smaller Porta Potti models, with a waste tank of roughly 2.6 gallons, weigh only a few pounds empty and fit in a closet or under a bed. They suit one or two people, apartments and vehicles. The small tank is the limit: it fills quickly and must be emptied every day or two with a family, which is a chore during a storm.
Best Budget Emergency Toilet: Reliance Luggable Loo
The Luggable Loo is a plastic five-gallon bucket with a snap-on seat and a lid. There is no water, no tank and nothing to break. It works with standard plastic liner bags and a powdered or gelled absorbent, and it stores inside itself, so the bucket doubles as a container for your bags. For shelter-in-place preparedness it is the lowest-cost and most dependable choice, which is why many emergency checklists recommend it.
Its weaknesses are comfort and odor. Seat height is low, and without sealed bags and a gelling or deodorizing powder it can smell. Manage that with the right consumables, covered below.
Best Low-Cost Flush Toilet: Camco Premium Portable Travel Toilet
Camco makes a no-frills flush toilet in the five-gallon class. It has a hand-pump flush, a detachable waste tank and a locking latch for transport. It is a good fit for a household that wants a flush toilet but not Porta Potti pricing, with the usual caveats about water use and emptying.
Best for Go-Bags: Cleanwaste Go Anywhere Toilet Kit
This folding system is built around a frame, a seat and gelling waste bags. It packs flat, which makes it easy to store in a vehicle or a bug-out bag. The bags are what you will use up, so buy extras. It is lighter and less sturdy than a bucket, so check the weight rating on the box if you need it for a larger adult.
How Many Bags or Flushes Do You Need? A Worked Example
Planning around real numbers prevents the most common mistake, which is buying a toilet and no supplies. Use a figure of about five uses per person per day (one or two solid, three or four liquid) for a rough estimate.
- Household: 4 people, 7-day plan.
- Total uses: 4 people x 5 uses x 7 days = 140 uses.
- Bag system: if you change the bag after every 2 to 3 uses, plan on 50 to 70 bags, plus one or two spare rolls. Cleanwaste and Reliance both sell bag-and-absorbent packs sized in these quantities.
- Flush system: a flush typically uses about 0.5 to 1 gallon from the fresh tank. At 70 flushes, you need roughly 35 to 70 gallons of water set aside for flushing alone, and the waste tank (5.5 gal) will need emptying about every 1 to 2 days for four people.
That water cost is why many preparedness planners pair a flush unit with a bucket as a backup: use the bucket for liquids and save the flush toilet for solids, or use bags only.
Decision Matrix: Which Type Fits Your Situation?
| Your situation | Best type | Why |
|---|---|---|
| Tight budget, short outages (1 to 3 days) | Bucket toilet with liners | Lowest cost, no water needed |
| Family of four, week-long outage possible | Flush unit plus bucket backup | Comfort for daily use, bag system as fallback |
| Limited water storage | Bucket or folding bag system | Does not use stored water |
| Apartment or small space | Compact Porta Potti or folding kit | Smaller footprint and lighter to carry |
| Older adult or limited mobility | Higher-seat flush unit with sturdy base | Easier to sit and stand; check weight rating |
| Vehicle or evacuation kit | Folding frame with gelling bags | Packs flat and light |
What Wears Out and What to Stock
- Seals and pump gaskets on flush units dry out if the toilet sits unused for years. Run it once or twice a year and keep spare seals if your model sells them.
- Bags are the main consumable. Choose thick liners (about 2 mil or heavier) and avoid thin kitchen bags, which tear.
- Absorbent or gelling powder turns liquid into a solid gel and reduces odor. Store it dry in a sealed container.
- Deodorizer for holding tanks should be labeled for your tank type, since formulas differ.
- Hand hygiene: keep hand sanitizer, soap and disinfecting wipes with the toilet to reduce illness risk when normal sanitation is disrupted.
- Privacy: a pop-up tent, shower curtain or tarp makes any of these units usable in a shared living space.
Common Mistakes to Avoid
- Buying a flush toilet without calculating the water you will need to flush it.
- Skipping the consumables. A toilet with no bags, powder or tank fluid is just a bucket.
- Storing it in an attic or garage that gets very hot or very cold, which can warp plastic and degrade chemicals.
- Dumping waste in a place that is not allowed. Check local rules; in an emergency, local authorities often publish disposal instructions.
- Forgetting to practice. Assemble and use the toilet once before you need it.
Frequently Asked Questions
What is the best emergency toilet for a power outage?
A power outage alone does not stop your toilet from working if you have running water, since most toilets can be flushed by pouring a bucket of water into the bowl. If the water supply or sewer also fails, a bucket toilet with liners is the simplest backup, and a Porta Potti is the more comfortable choice for longer outages.
How long does a portable toilet waste tank last?
It depends on tank size and the number of people. A 5.5-gallon tank commonly lasts a couple of people two or three days and a family of four about one to two days. Smaller 2.6-gallon tanks fill faster, so plan to empty them more often.
Can I use a regular bucket instead of a Luggable Loo?
Yes. A sturdy five-gallon bucket with a snap-on toilet seat and a heavy liner bag works the same way. The purpose-built seat and lid are more comfortable and help contain odor, but the system itself is just a bucket, a liner and absorbent.
How do I control odor in an emergency toilet?
Use sealed liners, add gelling or absorbent powder after each use, keep the lid closed and ventilate the room if possible. For flush units, add a holding-tank deodorizer sized for the tank. Tie off and store used bags in a lidded container away from living areas until disposal is possible.
Where do I dispose of waste from a portable toilet?
Bagged waste is usually double-bagged and placed in the household trash if local rules allow, while tank waste is emptied into a working toilet, a sewer cleanout or an RV dump station. Rules differ by location, and officials often issue specific guidance during disasters, so follow local instructions first.
How many bags should I store for a family of four?
For a seven-day plan, 50 to 70 bags plus absorbent is a reasonable starting point, based on the calculation above. Add a margin if you have young children or expect an outage longer than a week.
