What characterizes the brewing water in Plzen?

The brewing water in Plzen is characterized as very soft with few mineral ions. This water composition is crucial in producing the town's renowned pale lagers, like Pilsner Urquell. Soft water, which contains lower concentrations of minerals, particularly calcium and magnesium, allows for a clean and crisp flavor profile in the beer. This minimal mineral presence supports the delicate hop and malt characteristics without overshadowing them, which is essential for the clarity and smoothness of Pilsner-style lagers.

In contrast, the other options do not accurately reflect the water profile in Plzen. Mineral-rich water, hard and alkaline water, and water with a pronounced gypsum taste would impart different flavors and characteristics to the beer, likely resulting in a heavier mouthfeel and more pronounced flavors, which are not typical of the light, refreshing Pilsner style.