Water of good quality is found at the head of the valleys within the Crater and to the west of the town, where wells are very numerous; they are sunk in the solid rock to the depth of from 120 to 190 feet; in the best the water stands at a depth of 70 feet below sea level; the sweetest is the Banian Well, situated near the Khussaf Valley; it yields a daily average of 2500 gallons; the temperature of the water is 1020 Fahrenheit, the specific gravity '999, and it contains 1 '16 parts of saline matter in every 2000 gallons.