A (facies bicarbonate - calcic)
Only a few samples belong to the facies-calcic type. This consists
of waters drawn in correspondence of springs and superficial wells
in the internal areas of the island, concerning perched water tables.
The low temperature (from 18 to 25°C) (Figure 2) and conductibility
values (from 831 to 1789 mS/cm) (Figure 3), when compared to the
remaining standardisations are proof of the presence of relatively
superficial and fast circuits, with minimum water-rock interaction.
Group B (Bicarbonate-alkaline)
These are bicarbonate-alkaline waters. They are characterised
by high temperature values (from 40 to 90°C) and relatively
contained conductibility (from 1800 to 6700 mS/cm), when compared
to those in groups C and D. These waters were generally sampled
in the internal areas of the island, particularly near the marginal
faults of Mount Epomeo, at the top and at the foot of the same.