This guide outlines creating a simple and efficient freestanding rainwater collection system for preppers.

Materials List (Estimated Cost):

• Collection:

  • Large Tarp (10' x 10') - $20

  • Heavy-duty Rope (50 ft) - $10

  • Mesh Gutter Guard (optional, for debris reduction) - $10

  • Short PVC pipe (optional)

• Storage:

  • Food-grade Plastic Barrel (55 gallons) - $30 (2 is optional)

  • Spigot with Hose Thread - $10

• Tools:

  • Drill with bits

  • Utility knife

  • Scissors (for tarp)

  • Pliers (optional, for hose clamps)

  • Curable adhesive -$10

Total Estimated Cost: $70-$120 (depending on optional items)

Instructions:

1. Frame Construction (Optional):

   • While not strictly necessary, a simple frame can improve stability, tarp tension, and assist with dispensing. Use wood or PVC pipes to create a basic A-frame structure slightly taller than your desired barrel height. 

2. Tarp Preparation:

   • Cut a hole near the center of the tarp

   • Reinforce the edges of the tarp by folding them over and creating double-layered hems.

   • Using the utility knife and scissors, create reinforced holes at each corner and the center of the long edge with the gutter guard (if used).

3. Tarp Attachment:

   • Thread the rope through the reinforced holes, creating a loop at each end.

   • Secure the ropes to the top of your frame (if using) or suitable anchor points like trees or fence posts. Adjust the rope lengths to create a slight downward slope towards the barrel.

4. Diversion Channel:

   • drill a hole near the bottom of the barrel and attach spigot

   • (optional) if you desire an overflow barrel for extra collection, use a secondary barrel with a hole drilled near the bottom. Do the same for the primary collection barrel and attach an appropriately sized PVC pipe to each end. Keep both barrels level with one another on a flat surface.  

5. Barrel Placement and Connection:

   • Apply mesh guard to the top of the barrel

   • attach mesh guard to the hole in the tarp (optional)

   • Position the barrel beneath the tarp, where the hole was cut, and ensure stable and secure placement.

   • If using a spigot, pre-drill a hole in the barrel at the desired location and secure the spigot with appropriate gaskets and hose clamps (if needed).

Additional Tips:

• Elevate the barrel slightly (using bricks, a platform, or the optional constructed frame) to facilitate easier water dispensing (gravity flow).

• Consider placing the collection system in an open area with minimal obstructions for optimal rainwater capture.

• Regularly clean the tarp and gutter guards (if used) to maintain water quality and prevent debris buildup.

• Label your containers with the date of collection for water rotation purposes (older water used first).

Disclaimer: This system is intended for non-potable water collection (e.g., watering plants, flushing toilets). Always prioritize proper filtration and purification before consuming rainwater for drinking purposes (see In-Depth Filtration Guide below).

In-Depth Filtration Guide for Collected Rainwater

Collected rainwater can be a valuable resource, but it requires proper filtration and purification before consumption. Here's a breakdown of various methods, along with their limitations:

1. Pre-Filtering:

• Mesh Screen: Removes large debris like leaves and twigs. This is a basic but important first step before further filtration methods.

• Coffee Filter: Removes smaller particles like dust and sediment. Can be used in conjunction with other methods.

2. Filtration:

• Ceramic Filter: Removes bacteria and some parasites. Effective for long-term use but requires regular cleaning and replacement of the filter element. (Estimated Cost: $20-$50)

• Sand Filtration: Removes bacteria, parasites, and some viruses. Requires a multi-layered sand filtration system for optimal effectiveness. More complex to set up and maintain. (Estimated Cost: Varies depending on system complexity)

3. Purification:

• Boiling: Simplest and most effective method for eliminating most pathogens. Bring water to a rolling boil for at least 1 minute at altitudes below 6,562 feet (2,000 meters). Increase boiling time to 3 minutes at higher elevations.

• Chemical Disinfection: Chlorine tablets or iodine drops can be used for disinfection. Follow dosage instructions carefully, as improper use can

be harmful. Not effective against all contaminants and can alter taste. (Estimated Cost: $5-$10 for tablets/drops)

• Ultraviolet (UV) Light: Effective for eliminating bacteria and viruses. Requires a commercially available UV water purifier and a reliable power source. (Estimated Cost: $50-$200)

4. Post-Filtration Treatment:

• Activated Carbon Filter: Improves taste and removes any residual chemicals used in purification. Replace filters regularly according to manufacturer's instructions. (Estimated Cost: $5-$10 per filter)

Choosing the Right Method:

The best filtration method depends on your resources, storage capacity, and desired level of purification. Here's a simplified recommendation based on needs:

• Short-Term (Emergency): Boiling is the simplest and most effective option.

• Long-Term (Prepping): Combine ceramic filtration with boiling or chemical disinfection for a robust approach. Consider UV purification if reliable power is available.

Important Note:

• Regardless of the chosen method, always test a small amount of treated water before consuming larger quantities. This is especially important for children, pregnant women, and immunocompromised individuals.

• Regularly monitor and maintain your filtration system according to the manufacturer's instructions.

• Consider seeking professional advice from a water treatment specialist for complex water quality concerns.

By implementing a rainwater collection system and utilizing proper filtration methods, you can convert rainwater into a valuable and sustainable source of water for various non-potable and potentially potable uses during emergencies or in off-grid situations. Remember, water security is a critical component of preparedness.