Friday, November 01, 2019

Removing hormones from drinking water

This post is a follow-up from a previous one: Hormones in our water supply and should we be worried


Hi Chen Ko

Thank you for your response and insights.

I did not realise that pesticides also contained hormones! That's a little worrying.

Would there be any reverse osmosis systems you would recommend?

Thanks.

Best regards
C



Hi C,



Pesticides technically do not contain hormones. However, some pesticide molecules resemble hormone molecules hence exerting similar effects.

As mentioned previously, a reverse osmosis (RO) unit with pre- and post carbon filtration will be up to the task of removing hormones in water. As mentioned elsewhere in this blog (1, 2, 3), I am an advocate of NSF/ANSI certification for household water filtration units.



You can try this RO unit from Amazon which is certified under NSF/ANSI 58 (the standard for RO units) for system construction. Before the water goes into the RO membrane, it passes through a sediment filter, granular activated carbon filter and an activated carbon block filter which should do a good job at pretreatment. After the RO membrane, the water goes into a post activated carbon filter which should clean up the final product nicely. But as I mentioned previously, there is no certification to reduce hormones specifically so this unit certainly is not certified as such.





Cheers
Chen Ko 

A capable set-up for an RO unit