Seff, As someone who has a ...
Published by Shawn Crawford, National Accounts Manager at Rainwater Management Solutions
Seff,
As someone who has a potable rainwater harvesting system at my house and I work for a company who provides these systems in the U.S. all the time, I would recommend the following filtration system steps to ensure the water it safe.
First- sediment filtration at 10 microns or less.
Second- carbon activated filter to remove VOCs and odor
Third- UV light for disinfection
Its also a good idea to when starting the system to shock the system with chlorine to eliminate any residual. Only shock the withe system with chlorine once a year. Using chlorine inside your rainwater storage tanks regularly is not a good solution because it can effect the healthy ecosystem in your storage tanks. It will also cause wear and tear on your pump and plumbing system. Stick with UV treatment as much as possible. Keep in mind that rainwater is naturally clean water.
Below are package purification systems for home owners. If you are in a different country just let me know and I will point you to a distributor in your country.
Good luck and let me know if I can help at all.
Shawn Crawford