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Disinfect Water with Colloidal Silver

Colloidal Silver

Using Colloidal Silver to Disinfect Drinking Water in Long-Term Storage

If you’re a prepper, or if you just want to have some water stored for the long-term in case of earthquake, fire, terrorism, civil disorder or other potential dangers, you’ll need to make sure the water is thoroughly disinfected during storage so microbes don’t get a chance to grow in it. 

Thankfully, colloidal silver can effectively be used for disinfecting water during long-term storage.  And there’s another substance you can add, as well, that’s said to boost the disinfectant power of the colloidal silver by up to 1,000 times. 

Here’s the details you need to know if you want to keep your water free of microbes during long-term storage… 

There are as many opinions on how much colloidal silver to use for keeping water disinfected during long-term storage as there are people using it.  

In other words, everyone has a different opinion, and most of them are based on either hearsay or personal experience. 

Because water quality differs from town-to-town, region-to-region and state-to-state (and sometimes even from house-to-house), what works best for one person might not work as well for another.    

Nevertheless, the general rule-of-thumb is to use one ounce of 10 ppm colloidal silver per gallon of stored water.  But as a "just in case" measure, I personally use two ounces of 10 ppm colloidal silver per each gallon of water being stored, for maximum long-term disinfection. 

This means a five gallon container of water being put into long-term storage in my home would get 10 ounces of 10 ppm colloidal silver.  Yes, that’s overkill.  But again, I want to make sure my stored water is safe to drink when the time comes to use it. 


  • Great job Trevor! Yes…Colloidal SIlver is an easy and effective way to purify water. Thanks for sharing how you are using it and the amount you used to clean up your rainwater tank. Your words will help many!

    Joni @ TryBlue
  • I have a 5000-liter rainwater tank for my garden, fed from runoff from a shed. The roof of the shed is a playground for the local possums and subsequently, many droppings end up in the gutters and dissolve then running into the tank. The tank water with all those nutrients occasionally gets a bit smelly. I remedy this by generating 2 liters of 200 ppm Colloidal Silver and tipping it into the tank, resulting within a few hours the odor being gone. I admit I am no scientist but the garden and myself are happy with the result. Does anyone think this is a good approach?

    Trevor John Harwood

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