1/2" water in borewell in Bhubaneshwar at 150ft: What is water availability per day with this quantity

Dear Sir,

I am from Bhubaneshwar. We dug a bore well (Depth-270ft). We got a hint of water at 120ft and at 150ft we got about 1/2" water and even lesser water at 180 ft. But after that there is no sign of water. I asked the engineer to do a test and he said not much water is available at the site. He asked us to manage with that much water. I want know how much water we can get per day with 1/2" at 150 ft. We are 7 people staying at home and would like to know if that amout will be sufficient.