| SN | Place | Depth (Feet) | Radon (Bqll−1) |
| 1 | Yarandalli | 350 | 33.20 |
| 2 | Bommasandra | 300 | 30.50 |
| 3 | Bommasandra | 300 | 30.50 |
| 4 | Bommasandra | 650 | 21.50 |
| 5 | Thirupalya | 1000 | 25.10 |
| 6 | Thirupalya | 1200 | 69.60 |
| 7 | Bommasandra | 1280 | 72.40 |
| 8 | Adugodi | 300 | 11.70 |
| 9 | Jigani | 350 | 57.30 |
| Mean ± SE | 636.67 ± 137.8 | 39.09 ± 7.3 |