How to Purify Water with Sunlight

how to purify water with sunlight

Water is the single crucial point a person requires in a survival circumstance. Without water an individual can only make it through 3-5 days. Nevertheless, it’s extremely vital that the How to Purify Water with Sunlight

Polluted water can lead to a number of ailments such as typhoid fever, dysentery, diarrhea, and also many more.

In a survival scenario, these otherwise minor diseases can end up being lethal. This is why drinking clean water is so important.

Survival Water Purification

Cleansing water removes organic pollutants, hefty elements, and chemicals from water. There are several means to purify water, however in a survival scenario your options will likely be very minimal.

Depending on your circumstance, you may be privileged enough to be lugging some sort of water purification system with you. This is particularly real if you are a thru hiker or a person on a multi night trekking trip.

If you are unfortunate enough not to have among these systems with you, you’ll have to make do. The World Health Organization (WHO) recommends the following low-tech method of disinfecting water.  Using only sunlight and PET plastic bottles, the SODIS (solar disinfection) method uses a combination of UV sunlight and increased temperature to kill pathogens in the water.

How To Purify Water Using The Sun

  • The water should be from a clean, well known water source, such as a lake or stream. Running water is best. Avoid standing water; smelly water; water with an oily look; and water near latrines and sewers.
  • The water must not be chemically polluted. This method will kill bacteria, it will not remove chemicals.
  • If the water has visible contaminants, such as dirt, mud, or debris, filter the water by pouring it through several layers of cloth to catch as much sediment and debris as possible.  Then any remaining sediment settle to the bottom and filter until the water is as clear as possible. The UV rays will not be able to penetrate through cloudy, dirty water.
  • Use clean, clear soda or water bottles no larger than 2 liters. The bottles need to be in good condition with no scratches or other visible signs of wear.  It is best to use a “PET” (Polyethylene Terephthalate) bottle. Look for the recycle code #1 on the bottom.
  • Colored plastic and glass bottles will block too much of the UV rays. Indeed, some glass will block the UV rays completely.
  • Fill the bottles 2/3 full of water and shake for 20 -30 seconds. This will saturate the water with oxygen, which will help to kill the germs. Then finish filling the bottles to the brim with water. Lay them down in the sun. Do not stand them up. Laying them down allows the UV rays to penetrate to maximum depth.
  • Although not necessary, if possible, lay the bottles on a reflective surface to optimize the UV exposure.
  • If the sky is mostly sunny with only a few clouds, then 6 hours of sunlight will be enough. However, if the sky is more than 50% cloudy, then it will take 2 days to purify the water.  The ambient air temperature is not a factor, it is the strength of the UV sunlight that is significant.  If there is a question about the proper length of time because of the sky conditions, it is best to err on the side of caution and allow the full 2 days of exposure.
  • While there is some concern that toxins may leach out of the plastic bottle during the process, the Swiss Federal Laboratories for Materials Testing and Research have examined this process and found that the levels of toxins from the bottles is far below the WHO guidelines.


If you have a plastic canteen with you or any kind of various other clear container which you can store water, consider on your own lucky. If you do not, keep your eyes open searching for a container while you service the various other important points (situating water, finding or making shelter, as well as getting a fire going).

Just How to Cleanse Water with a Plastic Container

Fill up the water bottle with the doubtful water. You can run the water via fabric to help remove any kind of large fragments.

Place the container of water in the sunshine for a minimum of 6 hrs standing up right. It is necessary to leave the canteen alone for as long as feasible yet move it if you require to as the sun relocates throughout the day.

The ultraviolet light will certainly kill a lot of the germs and protozoa, helping to improve the quality of the water.

Leave the water bottle undisturbed and also upright to permit any kind of particulates and also solids to work out to the base of the bottle. Consume alcohol the water slowly to allow the dirt and also particles stay near all-time low, so you do not drink it.

Water does not need to be boiled to be made safe for drinking. Most microbes and pathogens will be killed at 150°F (65°C) for just five minutes.

Solar radiation can purify water and make it safe to drink.  Solar energy from the sun can disinfect water from lakes and rivers. The UV rays from the sun can kill harmful bacteria , parasites, and viruses, given enough exposure.

How to Get one of the most Out of Water

After remaining in the sunshine for hours, the water will certainly be really hot. If you are in hopeless demand of water, consume it and don’t bother with the temperature level. Be forewarned that this can increase your body temperature though.

But if you remain in good form, wait until the water has gotten to concerning body temperature. The body needs to change any kind of water consumed back to body temperature level. So if the temperature either a lot higher or a lot reduced, the body will eat priceless calories to bring it to the right temperature.

Surely through the article How to Purify Water with Sunlight, you can survive in a place with polluted water. If you want to learn more, you can visit our website.


Leave a Reply

Your email address will not be published. Required fields are marked *