Quick Answer
Storing water in plastic containers long-term is generally safe if the containers are made of food-grade materials, properly cleaned and sanitized, and stored in a cool, dark place.
Material Safety
When selecting plastic containers for long-term water storage, look for those made from food-grade materials, such as HDPE (High-Density Polyethylene) or PET (Polyethylene Terephthalate). Avoid containers with BPA, PVC, or other chemicals that can leach into the water. Check the manufacturer’s label for certifications like NSF International or FDA compliance.
Storage and Maintenance
To maintain the safety and quality of stored water, ensure the containers are clean and sanitized before filling. Use a solution of 1 tablespoon of unscented chlorine bleach per gallon of water to disinfect the containers and water. Regularly inspect the containers for signs of damage, such as cracks or holes. Replace any damaged containers and consider adding a water treatment, like activated carbon or ultraviolet light, to remove contaminants.
Container Selection and Capacity
For long-term storage, consider using containers with a capacity of at least 1 gallon each. A good rule of thumb is to store 1 gallon per person per day for drinking, cooking, and hygiene. For a family of four, for example, a 4-gallon container would be the minimum. However, larger containers, like 55-gallon drums, can be used for bulk storage but require more frequent water turnover to prevent stagnation and contamination.
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