Impure Waters  

The darkwater that have occupied Glinghant are vile, corrupting creatures sent by Amarthiel for the purpose of despoiling the beauty of its pools and gardens. The beauty it had of old is lost, and the water's taint now spreads through the city. I fear that the corruption will soon spread to Lake Nenuial if something is not done!

'It was not an easy matter, but I spoke with Gwindeth, the Blue Lady of Nenuial, and acquired a phial of clean water with which we may be able to purify the pools of Glinghant. The phial does not contain much, so we must not waste it, but if it might be poured into the pools on each of Glinghant's three terraces, we might be able to purify the waters and thus lessen the corruption of the darkwater.

'The entrance of Glinghant is here at the court of Clorhir. Pour some water from this phial into the pools on each terrace of Glinghant and return to me when you have done so. We may still be able to cleanse away some of this evil, Czarevna! If I am not available when you return, please speak with Captain-General Daerdan, at Echad Garthadir, here in the city.'

Harthadril is worried about the corruption of the waters of Glinghant and wants them cleansed.

Objective 1
Find the pool on the first terrace
Find the pool on the second terrace
Find the pool on the third terrace

The entrance to Glinghant is located in the court of Clorhir, in Annúminas. Glinghant consists of several terraces, and every terrace supports a pool of water.

Harthadril has asked you to pour some water from the phial of clean water she gave you into each of the terrace pools in Glinghant.

Objective 2
Bring phial of clean water to Harthadril
or
Bring phial of clean water to Captain-General Daerdan

The quest log says to find each terrace of water, but you must actually use the phial in each pool.