What to do with Jal offered at Shiv Ling in temple?

Har Har Mahadev Wishing everyone a Happy Mahashivratri I have gradually begun my journey of spirituality and connecting with God via Hinduism. I visited temple today morning to offer milk and jal(water) to Shiv Ling on the occasion of Mahashivratri. There were many devotees in the temple and to manage the crowd there were volunteers, after I was done offering the milk and water to Shiv Ling, one of the volunteer took the lota from my hand and filled it with jal from the jaladhari. This jal is a mixture of (water, milk, other offerings like flowers, chandan, etc) that all devotees were offering to Shiv Ling continuously. The jal filled in very small amount and due to crowd the devotees were given very small amount of time, so I couldn't ask or check with someone on what to do with the jal. I checked with a relative and they said that we are never supposed to bring the jal offered to Shiv Ling and collected from Jaladhari at home. I have kept it in the lota, waiting for some correct guidance on it as I was not convinced with my relatives reply. I humbly request some help and guidance on this. Thank You. Disclaimer: I apologise if any of the words or sentence hurt anyone or felt disrespectful to anyone. Those are not my intentions, kindly consider and guide me as a beginner in the journey. Om Namah Shivaya