Water Storage
From InterceptRadio.com Wiki
Here are some quick tips regarding long term water storage.
For small quantities (like storing some water in your car) its best to use HDPE #2 plastic bottles. An example is filling a Nalgene 32oz bottle with 28oz of water plus 2 drops of Clorox bleach.
For larger quantities its best to use HDPE #2 or PP #5 containers. An example is filling a 5-gallon bucket with water plus 1/2 teaspoon of Clorox bleach.
Using bleach in these ratios (2 drops per quart or 1/2 teaspoon per 5 gallons) will keep the water sterile.
Its best to only use HDPE #2 or PP #5 containers. Other containers can leach chemicals into the water. Do not use 2-liter soda bottles (PET #1) for long term water storage !