Survival Guide : How To purifying Rainwater?

Rainwater can be filtered for drinking as long as you have a clean catchment surface and you use a proper filter. Water for the whole house can be filtered using a uv filter or quantum filtration system or you can use a gravity filter such as a Berkey Water Filter just for your drinking water.

Many people are interested in learning how to purify rainwater for use in plants and gardens. There are a few simple steps you can take to make your water more pure. First, try using a water filter. Second, store your rainwater in a container that has a lid or cover. Third, wait until the water has stopped raining before using it, to avoid contamination from pesticides and other pollutants. Finally, always drink purified water rather than tap water when possible.

Why Purify Rainwater?

Purifying rainwater is important for a few reasons. The most obvious reason is that it makes the water safer to drink. Purified rainwater also doesn’t have any of the chemicals or pollutants that are often found in tap water. This is important because those chemicals and pollutants can be harmful to your health. Purifying rainwater can also help conserve resources. When you purify rainwater, you don’t have to use as much energy to treat tap water, and you don’t have to rely on groundwater, which can be depleted if too many people are using it.

Water Treatment Steps


Coagulation is often the first step in water treatment. During coagulation, chemicals with a positive charge are added to the water. The positive charge neutralizes the negative charge of dirt and other dissolved particles in the water. When this occurs, the particles bind with the chemicals to form slightly larger particles. Common chemicals used in this step include specific types of salts, aluminum, or iron.


Flocculation follows the coagulation step. Flocculation is the gentle mixing of the water to form larger, heavier particles called flocs. Often, water treatment plants will add additional chemicals during this step to help the flocs form.


Sedimentation is one of the steps water treatment plants use to separate out solids from the water. During sedimentation, flocs settle to the bottom of the water because they are heavier than water.


Once the flocs have settled to the bottom of the water, the clear water on top is filtered to separate additional solids from the water. During filtration, the clear water passes through filters that have different pore sizes and are made of different materials (such as sand, gravel, and charcoal). These filters remove dissolved particles and germs, such as dust, chemicals, parasites, bacteria, and viruses. Activated carbon filters also remove any bad odors.

Water treatment plants can use a process called ultrafiltration in addition to or instead of traditional filtration. During ultrafiltration, the water goes through a filter membrane with very small pores. This filter only lets through water and other small molecules (such as salts and tiny, charged molecules).

Reverse osmosisexternal icon is another filtration method that removes additional particles from water. Water treatment plants often use reverse osmosis when treating recycled waterexternal icon (also called reused water) or salt water for drinking.


After the water has been filtered, water treatment plants may add one or more chemical disinfectants (such as chlorine, chloramine, or chlorine dioxide) to kill any remaining parasites, bacteria, or viruses. To help keep water safe as it travels to homes and businesses, water treatment plants will make sure the water has low levels of the chemical disinfectant when it leaves the treatment plant. This remaining disinfectant kills germs living in the pipes between the water treatment plant and your tap.

In addition to or instead of adding chlorine, chloramine, or chlorine dioxide, water treatment plants can also disinfect water using ultraviolet (UV) light or ozone. UV light and ozone work well to disinfect water in the treatment plant, but these disinfection methods do not continue killing germs as water travels through the pipes between the treatment plant and your tap.

Methods: What are the options?

Rainwater harvesting is becoming a popular way to collect and store rainwater for later use. There are a few things you should do before the rainwater from the roof even gets into your water tank. First, make sure your gutters are clean and free of debris. Next, install an adequate downspout system to funnel the water away from the house and foundation. Finally, configure your irrigation system to take advantage of the stored rainwater.  These prefilters serve as an additional measure towards ensuring that only clean, debris free water enters the tank.

1. Filtration or filtering, namely by using several layers such as stones, gravel

The use of a filtration or filtering system is beneficial in a variety of ways. A filtration system can help to improve the quality of water, provide a place for fish and other aquatic life to live, and can also be used as a decorative element in a pond or water garden. There are many different types of filtration systems available on the market, but one of the most popular is the use of several layers such as stones, gravel, and sand. This type of filtration system is often called a three-layer filter or biofilter.

UV Filtration Systems

A UV Filtration System treats unsafe water containing pathogens and bacteria with a germicidal ultraviolet light. The UV wavelength scrambles the DNA of the live organisms, making them unable to reproduce and cause you to be ill.

A UV Filtration system can be used to treat the water of an entire house. It does not filter out coarse debris, prefilters are necessary for that, but it does a great job at killing pathogens.

It utilizes a ballast that acts as the power control center and a specialized UV bulb inside of a housing. The prefiltered water is exposed to the light, killing off any pathogens and then continues on to the home.

2. Using Chemical Agent Such as Alum.

Alum is a mineral that has been used for centuries to help preserve foods. It is also used as a pickling agent and to add crispness to salads. Alum can be purchased at most pharmacies or grocery stores.

3. By using the distillation technique.

Distillation is to boil water at a certain boiling point to separate the water from certain substances in the water. Distillation is a process that is used to purify liquids. The technique was first developed by the Arabs and then brought to Europe in the 12th century. The process of distillation works by boiling the liquid and then capturing the vapor that is produced. The vapor is then cooled and turned back into a liquid. This technique can be used to purify water, alcohol, or other liquids.

WATER FREEDOM SYSTEM : Surviving a Water Crisis

Keeping Water Fresh During Dry Periods

There are times when it doesn’t rain for long periods of time. If water is left sitting for too long with out being replaced, it can become stagnant and smelly leading to some foul tasting water. These problems are simple to over come using one of the 2 methods mentioned below.

Here are six tips for purifying rainwater:

1. Have a container ready to store the purified water.

2. Filter the water using a quality filter.

3. Use boiling or cold water to clean and disinfect your container after each use.

4. Re-toilet water.

5. Use a UV sterilizer to kill bacteria.

6. Have a backup purification system in place ready to use when the main one breaks down or fails.


References :