Probably. Coffee is 98% water — and it's the one variable you've never checked. Find out in 30 seconds.
From your water report — or any $12 aquarium GH/KH strip (the fish people solved this years ago).
Built on the published science: Dashwood & Hendon, Water for Coffee; SCA brew-water standards. A Juliet project, made by Paleo Treats in San Diego. · @juliet.actual