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Filtering tap water: does it need filtering and (if yes) what kind of filter?  RSS feed

Antonio Scotti
Posts: 47
Location: Spain
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I am not sure if this is the right forum to post this, but could not find any other related to water issues. If anyone know another forum is better please let me know so I'll repost.

So, I live in big city in Spain and our tap water is not very nice, both chlorine and other chemical, non natural substances, are to be found in the water the water agency sends us every day. High levels of chlorine make the taste disgusting, the other substances although in very small quantities (there are apparently over 500 chemical compounds in our water) are probably no good to be drank over a long time, despite the agency saying the contrary.
I was looking for a water filter to put in line but I am not sure which one would do the job. There are carbon filters, ceramic filters and reverse osmosis filters.
Reverse osmosis filters are probably the best with respect to filtering power but they discard a lot of water and leave the water almost like distilled water. On the other hand
other hand all resellers I have consulted say that their filter is the best (on the same price scale) no matter what, so it is not easy to make an informed decision unless one knows a lot on the topic it seems to me.

So does anyone have ideas on what parameters are worth checking in order to choose which filter is more appropriate and sufficient for my situation? Or even if it is actually worth considering having any filter at all (may be just a simple one for removing chlorine)
For sure I don't need any sanitation services done by the filter since the water is already sanitized because of chlorine.
Actually I will need one that removes it. But this is the easy part I guess. The filter has to screen out chemicals such as trialomethanes to say one, which I know are present in the municipal water of the city where I live and may be what remains of heavy metals or other chemical compounds.
James Freyr
Posts: 292
Location: Middle Tennessee
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I don't trust municipal water supplies (remember Flint Michigan or further back, Washington D.C.?) and I choose to filter my tap water with reverse osmosis filter so there's no question as to whether it removes something or not and add minerals back to it with a tiny pinch of unrefined sea salt. It's delicious
Henry Jabel
Posts: 168
Location: Worcestershire, England
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After looking around online for a quite a while trying to avoid disposable filters that would envariably end up in landfill I eventually found an inline empty 'filter'. This enables me to fill it with any media I wish I simply put in some activated carbon every six months or so along with some sterling silver bits and pieces to discourage bacterial growth. After the intial cost it's few pence a year to replace and I spread the used carbon on the garden.

I still haven't got round to refixing it properly (after another plumbing job) so it looks a bit dodgy right now, but the carbon gets rid of most of the nasty stuff and the taste of the water has improved considerably.

It may not filter everything out (e.g flouride-which I dont think they add to the water in Spain) but its a cheap good solution and you could always add to it at a later date.
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