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IBC totes can be used for drinking-water storage, but only when the tote itself is suitable for potable water and the water going into it is safe to drink.
A used IBC tote with an unknown history should not be used for drinking water. The same goes for a tote that previously held pesticides, fuel, cleaning chemicals, or other toxic materials. Cleaning the tote does not turn an unsuitable container into a verified drinking-water tank.
If the tote will hold collected rainwater, there is another issue: a safe container does not make roof runoff safe to drink. Drinking rainwater requires suitable collection materials, treatment, regular testing, and ongoing maintenance. CDC says rainwater can contain both germs and chemicals even when it looks clean.
What Makes an IBC Tote Suitable for Drinking Water?
For drinking-water use, look at both the tote and its history.
A good candidate should have:
- A container that the manufacturer states is suitable for drinking-water storage or the required potable-water use.
- Materials intended for contact with drinking water.
- A known history with no toxic chemical contamination.
- A lid, outlet, gaskets, and fittings that are also suitable for the intended water use.
- An interior that can be properly cleaned and sanitized.
- Protection from dirt, insects, animals, and other contamination.
CDC recommends food-grade water-storage containers when storing drinking water. It also says never to use containers that previously held toxic chemicals such as pesticides.
For a permanent drinking-water system, it is worth going further than a vague "food-grade" description. Check the manufacturer's documentation for the exact tote. NSF/ANSI/CAN 61 is one standard used to evaluate health effects from materials and components that contact drinking water.
Certification requirements vary by location and application, so check the requirements that apply to your system.
Is a Food-Grade IBC Tote Automatically Safe?
No.
"Food-grade" is useful information, but it does not answer every drinking-water question.
A food-grade tote may be made from material suitable for food contact. That does not prove that:
- The tote has never held an unsafe substance.
- Its replacement valve or gasket is suitable for drinking water.
- It has been stored cleanly.
- Roof runoff entering it is potable.
- The tote has the drinking-water certification required where you live.
There is also a major difference between a new food-grade tote and a used tote that once carried food.
A used tote may contain residue from syrup, oil, juice concentrate, or another product. Some residues can be hard to remove from valves, threads, gaskets, and corners. For drinking-water use, knowing exactly what was stored in the tote matters.
If you cannot verify its history, choose another tank.
Never Use a Chemical IBC Tote for Drinking Water
An IBC tote that held toxic chemicals should be ruled out for potable water.
That includes totes previously used for materials such as:
- Pesticides
- Petroleum products
- Industrial chemicals
- Toxic cleaning chemicals
- Other hazardous substances
CDC specifically warns against using water containers that previously held toxic chemicals because chemicals may transfer into the stored water.
Do not depend on appearance or smell. A tote can look clean after washing while still being a poor choice for drinking-water storage.
An unknown-history tote should be treated the same way. If you do not know what was inside it, you cannot reliably confirm that it is suitable.
For garden irrigation or other non-potable uses, the decision may be different depending on the tote's former contents and what you are watering. Drinking water calls for a much more conservative approach.
What About a New IBC Tote?
A new tote removes one of the biggest problems: unknown previous contents.
However, "new" alone is not enough.
Before using one for drinking water, check the manufacturer's documentation. Confirm that the inner bottle and any water-contact parts are intended for potable-water storage.
Pay attention to:
- Inner bottle material
- Outlet valve
- Gaskets and seals
- Lid
- Adapters
- Bulkhead fittings
- Hoses and pipes connected downstream
A bulkhead fitting is a fitting that passes through the wall of a tank while forming a watertight connection.
There is little benefit in choosing a suitable tank and then running the water through an unknown hose or unsuitable fitting.
Can You Drink Rainwater Stored in an IBC Tote?
Not simply because it is stored in a safe tote.
Rainwater can pick up contamination from the air, roof, gutters, pipes, animals, and storage system. CDC notes that roof runoff can contain germs as well as chemicals from roofing, gutters, piping, and storage materials.
For that reason, a system intended to provide drinking water should be planned as a complete system.
A typical system may involve:
roof → debris screening → first flush → storage → treatment → drinking-water plumbing
A first-flush diverter sends the first portion of roof runoff away from the tank. That early runoff often carries more dust, droppings, and other material that accumulated on the roof between storms.
CDC recommends considering first-flush diversion to improve collected rainwater quality. It also recommends regular testing when rainwater is used for drinking, cooking, or bathing.
First flush is useful, but it does not disinfect the water.
Filtration Alone Does Not Make IBC Rainwater Potable
A common mistake is to install a sediment filter and assume the water is now safe.
A sediment filter mainly removes particles. Depending on its micron rating, it may trap dirt, grit, and other particles above a certain size. The micron rating describes the approximate size of particles the filter is designed to capture.
It does not automatically remove:
- Bacteria
- Viruses
- Protozoa
- Dissolved metals
- Organic chemicals
- Contaminants leached from roofing or plumbing
Other treatment stages may be needed depending on the water quality. Those could include different forms of filtration and disinfection.
No single treatment stage should be chosen without knowing what needs to be removed. CDC recommends choosing treatment based on the germs and chemicals present in the water.
Testing Matters Even When the Water Looks Clear
Clear water is not proof of safe water.
If collected rainwater will be used for drinking, CDC recommends regular testing for harmful germs and chemicals. Your local health department can help determine which tests are appropriate for your area and system.
Review drinking water stored in an ibc tank to interpret water-testing requirements for the proposed household purpose.
Laboratory testing is different from simple home strips or meters.
For example, a total dissolved solids, or TDS, meter estimates the amount of dissolved material in water based largely on electrical conductivity. It cannot tell you whether the water is free from harmful bacteria, lead, pesticides, or many other contaminants.
A low TDS reading therefore does not prove that IBC-stored water is safe to drink.
Keep Sunlight Away From the Water
Most plastic IBC totes are translucent. That can become a problem outdoors.
Sunlight reaching stored water can support algae growth. CDC also recommends keeping stored drinking water away from direct sunlight and in a cool location when possible.
An outdoor IBC can be protected with a suitable opaque cover or enclosure. Avoid materials that can contaminate the tank or trap enough heat to create other problems.
Any cover should still allow inspection and maintenance.
Keep the Tank Closed and Protected
Drinking-water storage should not be open to insects, dust, leaves, rodents, or other contamination.
Keep openings properly closed or screened as appropriate. Make sure overflow and vent arrangements do not provide easy entry for pests.
Also avoid repeatedly opening the large top cap to scoop water from the tank. Every hand, cup, hose, or tool entering the tote creates another chance for contamination.
A closed outlet system is generally easier to keep sanitary.
Clean and Sanitize the Tote Before Use
Even a suitable container should be cleaned before it becomes part of a drinking-water system.
CDC recommends washing water-storage containers, rinsing them thoroughly, and sanitizing them before filling them with safe water.
Follow the tote manufacturer's cleaning instructions as well.
Be especially careful around:
- The bottom valve
- Cap threads
- Gaskets
- Corners
- Outlet adapters
These areas can hold residue that is harder to see and remove.
Cleaning and sanitizing also need to become part of long-term maintenance. A one-time cleaning does not keep a tank sanitary forever.
Do Not Connect Untreated Rainwater Directly to Drinking-Water Plumbing
If your property has both rainwater and utility or well-water plumbing, keep the systems properly separated.
CDC warns that rainwater can contaminate treated water if the two systems are improperly connected.
Permanent plumbing systems may require approved backflow protection, air gaps, permits, or other safeguards. Requirements depend on where you live.
This is one point where a qualified plumber or local health/building authority should be involved rather than improvising a connection.
IBC Tote Safety Checklist
Before using an IBC tote for drinking-water storage, check these points:
| Question | What you want |
|---|---|
| Is the tote's history known? | Yes |
| Did it ever hold toxic chemicals? | No |
| Is it approved or documented for the intended potable-water use? | Yes |
| Are valves, seals, and fittings suitable too? | Yes |
| Can the inside be cleaned and sanitized? | Yes |
| Is the tote protected from sunlight and contamination? | Yes |
| If storing rainwater, is there suitable pretreatment and treatment? | Yes |
| Is drinking water regularly tested? | Yes |
| Are potable and non-potable plumbing kept safely separated? | Yes |
| Are local requirements being followed? | Yes |
If you cannot answer the first few questions confidently, use another tank.
When an IBC Tote Makes More Sense for Non-Potable Water
Used IBC totes are often easier to justify for non-potable rainwater systems, provided their former contents are known and compatible with the intended use.
Possible uses include:
- Watering ornamental plants
- Supplying some garden irrigation systems
- General outdoor cleaning
- Other permitted non-potable uses
Non-potable means water that is not intended for drinking.
The exact acceptable use still depends on what the tote previously contained. For example, a tote that held a hazardous chemical is not automatically suitable for a vegetable garden just because nobody plans to drink directly from it.
When the tote's history is uncertain, avoiding it is usually the simpler choice.
Frequently Asked Questions
Can I drink water from a food-grade IBC tote?
Potentially, if the exact tote is suitable for drinking-water storage, has a safe history, is properly cleaned and maintained, and the water itself is potable. A food-grade label alone does not make untreated rainwater safe to drink.
Can I use a used IBC tote for drinking water?
Only with great care. You should be able to verify exactly what it previously contained and confirm that the container is suitable for the intended potable-water use. Avoid unknown-history totes and any tote that held toxic chemicals.
Can I clean a chemical tote well enough for drinking water?
A tote that previously held toxic chemicals should not be repurposed for drinking-water storage. CDC specifically advises against using water containers that previously held toxic chemicals.
Does a white or clear plastic IBC need to be covered?
Outdoor translucent tanks should be protected from direct sunlight. Keeping light away from the stored water helps limit algae growth and also protects the tank from unnecessary sun exposure.
Is filtered rainwater from an IBC safe to drink?
Not necessarily. Filters remove only the contaminants they are designed to remove. Drinking-water use requires treatment chosen for the actual germs and chemicals present, along with regular testing and maintenance.
Does boiling IBC rainwater make it completely safe?
No. Boiling can address many disease-causing germs, but it does not remove many chemical contaminants. If roof runoff contains unsafe metals or chemicals, boiling is not a complete treatment solution.
Should I test rainwater stored in an IBC?
Yes, if you plan to drink, cook with, or bathe in it. CDC recommends regular testing for germs and chemicals and suggests consulting your health department about appropriate testing.
