Stand Alone Rainwater Harvesting System
How do I disinfect and purify water in a Disaster?
by RainSaucers Inc. on September 3rd, 2014

Without covering too much old ground- let us just restate our position that freshly, cleanly caught rain water is fully potable as-is (see our posts on Potable Rainwater). But, as we have been asked many times, what does one do when the rainwater you have collected has gone foul from being outside too long? It's time to treat the water. In the event of a Disaster, here are some reliable methods that require no power and little planning:
- Solar Disinfection: kills most bacteria. All you need is sunshine and a PET bottle.
- Household Bleach: One teaspoon will disinfect 5 gallons. Immediately after treating, the water must initially have a slight smell of chlorine. If it does not - repeat the process.
- Tincture of Iodine: if you have it in the medicine cabinet, 5 drops will disinfect 1 quart.
- Boiling for 1 minute: kills all the bacteria but you need to have that fire going and pot to boil
- An impromptu Bio Sand filter: you can make one with just Sand, some pipe, and a few 5 gallon buckets. See this site for more details.

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