Table 4. Comparison of radiation dose rates of Chavara-Neendakara beach placer deposit area with other HBRAs.
| S.No | Area (Country) | Characteristics of Area | Absorbed dose rate in air | Reference |
| (nGy h−1) | ||||
| Present Study | ||||
| 1 | Chavara Neendakara (India) | Monazite sands | 1475–28,388 | – |
| 2 | Guarapari (Brazil) | Monazite sands | 90–90,000 | [40] |
| 3 | Ramsar (Iran) | 226Ra in spring water | 70–17,000 | [12] |
| 4 | Southwest (France) | Uranium minerals | 10–10,000 | [13] |
| 5 | Morro Do Forro (Brazil) | Thorium rich alkaline intrusive | 2800 | [30] |
| 6 | Nile Delta (Egypt) | Monazite sands | 20–400 | [31] |
| 7 | Cox’s Bazar (Bangladesh) | Monazite sands | 260–400 | [44] |
| India | ||||
| 8 | Kerala coast | Monazite sands | 200–4000 | [10] |
| 9 | Ullal (Karnataka) | Monazite sands | 2100 | [14] |
| 10 | Tamil Nadu coast | Monazite sands | 200–4000 | [11] |
| 11 | Kudiraimozhi (Tamil Nadu) | Monazite sands | 200–900 | [43] |
| 12 | Bhimilipatanam (Andhra Pradesh) | Monazite sands | 200–3000 | [43] |
| 13 | Kalpakkam (Tamil Nadu) | Monazite sands | 3500 | [15] |
| 14 | Chhatrapur (Orissa) | Monazite sands | 375–5000 | [29] |