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?


Best regards

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.

Chen Ko 

A capable set-up for an RO unit