They are slightly
less alkaline over the last 100 years or so.
Not exact matches
It also means you'll get
less minerals and nutrients
over time - in fact, some of these health effects can already be seen in hardcore
alkaline water drinkers.
Modern plankton foraminifera become inhibited below pH 7.6 - 7.8, thus only if some of these species recover their ability to grow in
less alkaline, CO2 - rich waters, then there will be no problem
over the centuries to come.
A pH
over 7 is
alkaline, thus a pH change from 8.25 to 8.14 is
less alkaline (and indeed more towards the acid side, but not directly «more acidic»).