Is Rainwater Safe to Store in 55-Gallon Drums?

Collecting and Storing Rainwater

Collecting rainwater from a clean roof is a great way to store water for prepping. A first flush device should be installed to divert the initial flow of water that may contain debris and contaminants from the roof. This device typically consists of a small valve and pipe that allows the first 10-15 gallons of water to flow out before the rest of the water is collected.

Treating and Purifying Rainwater

Once collected, the rainwater should be treated and purified to make it safe for consumption. This can be done through various methods such as sedimentation, filtration, and disinfection. Sedimentation involves allowing the water to sit for a period of time to allow particles to settle, while filtration can be achieved through a filter with a porosity of 0.2 microns or smaller. Disinfection can be done through the use of chlorine or iodine tablets. For a 55-gallon drum, it is recommended to treat and purify the water at a rate of 1 gallon per minute.

Maintenance and Testing

Regular maintenance and testing are crucial to ensure the quality of the stored rainwater. The drums should be inspected regularly for signs of leakage or contamination, and the water should be tested for pH, turbidity, and bacterial content at least once a month. Testing kits can be purchased or done through a laboratory. It is recommended to test the water at the beginning, middle, and end of the storage period to ensure the water remains safe for consumption.