Water hardness and drawdown time for pour over

Water hardness and drawdown time for pour over

minimum dose size?

I use the Hario switch to brew my coffee and am trying to reduce my caffeine consumption. Hence I would like to brew smaller cups of coffee. I am currently using 10g of coffee with 160g of water. (1:16 Ratio) I am wondering if there is a minimum amount of coffee...

Water hardness and drawdown time for pour over

tl;dr I used harder water than normal to brew my coffee with a pour over dripper but kept everything else the same. The drawdown time was much faster but the taste was the same.

I'm visiting my parents for the next few days and decided to bring my Kalita 155, hand grinder, and one of my coffees on the trip. They have harder water. I'm not sure what the TDS is, but it's really obvious, for example, based on how it dries your skin out after a shower. They just have a regular water filter for drinking water and making coffee, tea, etc. For reference, my water at home is about 150 ppm (120 after a Brita filter).

I knew their water was harder, but I didn't know how this would affect my brew, so I just used the same grind setting I normally use for this coffee. The drawdown time was much faster, by something like 45 seconds, so I was worried that it would be under-extracted. However, the coffee tastes great, and I don't think I can tell a difference between it here and how it tastes at home. It seems the increased extraction power of the harder water has simply caused the brew to finish faster, and the two effects have canceled out, resulting in a cup with the same extraction level as if I had used softer water. This was very surprising to me. Can anyone corroborate this effect for pour over coffee?

Note, I'm not advocating using hard water for brewing if you can avoid it. I was just really surprised at the huge difference in drawdown time and associated minimal difference in taste.

submitted by /u/montagdude87
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