Borewell 140 ft at NE corner of apartment, with neighbouring wall & ceiling close in Bangalore- Can the depth be increased?

Borewell depth is 140feet and is located at  northeast corner of our aptartment, with neighbours wall and ceiling very close.

Last summer we had to get water through private tankers. We have initated water saving methods in the apartment complex, but would like to have more suggestions to avoid water shortage during the summer months.

Would like to know if increasing the depth of the existing borewell by taking a geologists help on the excat depth will be of help? We were told that by the borewell people that the location of the borewell makes it impossible to reach it for further digging.

Need suggestions to tackle this issue.

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