No Pooja or Ritual is said to be complete without use of Gangajal. Lots of tradition are there behind this Gangajal as there are lots of purifying properties. Lots of cermony take place in presence of Ganga waters as it is used for conduct of rituals. Most of them don't know the interesting factors behind this holy waters.
Going to origin of Ganges, we need to talk of the puranic story of Bagiratha who was instrumental in getting Ganges on to the earth. Ganges is the cosmic river which flows down from heavens.
As per rituals the heavenly Ganges emancipate the souls of the sixty thousand sons of Sagara which lay imprisoned in their ashes due to the curse of sage Kapila. Ganges seems to be engaged in divine mission of removing all sins. The Gange is also used to cleanse the souls as it originates at a place called Gaumukh in the Himalayas.
The Ghantak near Kathmandu is another major tribute to the holy river. More holy waters are poured together into Ganges to enrich its content. There are lots of special properties too. The distinct aura itself creates more positive vibrations.