Pilsen

Pilsen water is extraordinarily soft. Almost no minerals at all. That absence is what allowed Bohemian brewers in the 1840s to produce the first pale lager: a beer so clean and bright that it changed what the world expected beer to look like.

The low mineral content means the water doesn't interfere. There's very little bicarbonate to buffer mash acidity, so pale malts can drive pH down naturally without adjustment. And there's almost no sulphate or chloride to push the flavour in either direction. The result is a beer where the malt and hops speak for themselves, with nothing getting in the way.

If you're brewing a Czech-style pilsner, a Helles, or anything that relies on delicate malt character and a soft finish, Pilsen is the starting point. It's also one of the easier profiles to replicate, because you're aiming for near-nothing. Soft bottled water or diluted tap water gets you most of the way there.