Quick Answer
Using rainwater collection systems is an effective emergency preparedness strategy for survival. It allows individuals to have a reliable source of clean drinking water during droughts or natural disasters. A well-designed rainwater harvesting system can provide up to 50,000 gallons of water per year.
Collecting Rainwater
To collect rainwater, you’ll need a rainwater harvesting system consisting of a roof catchment area, a first flush device, a storage tank, and a distribution system. A common ratio for a roof catchment area is 1,000 square feet to 1,500 square feet per person, with a minimum of 50 square feet. The first flush device helps to divert the initial roof flow, which may contain contaminants, and allows clean rainwater to flow into the storage tank.
Storing Rainwater
Rainwater storage tanks should be made of food-grade materials, such as polyethylene or stainless steel, and have a capacity of at least 100 gallons per person. The storage tank should be located under a shaded area to prevent algae growth and evaporation. It’s essential to cover the storage tank to prevent mosquito breeding and contamination.
Treating and Distributing Rainwater
Before using rainwater for drinking, it’s crucial to treat it with a proper filtration system, such as a sediment filter, activated carbon filter, and ultraviolet (UV) filter. The distribution system should include pipes and faucets that are easy to clean and maintain. Regularly testing the rainwater for bacteria, viruses, and other contaminants is also essential to ensure it’s safe to drink.
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