Table 3 Distribution of radon, thoron, EERC and EETC in different zones of Nainital, Almora and Bageshwar.
 | Radon Bq/m3 | EERC Bq/m3 | AEDR mSv/y | Thoron Bq/m3 | EETC Bq/m3 | AEDT mSv/y |
---|---|---|---|---|---|---|
Nainital | ||||||
Zone-A | ||||||
 Min | 15 | 6.7 | 0.4 | 21 | BDL | BDL |
 Max | 63 | 56.7 | 3.6 | 68 | 4.4 | 1.2 |
 Mean | 35 | 21.4 | 1.4 | 38 | 1.1 | 0.3 |
 SD | 12 | 13.0 | 0.9 | 12 | 1.2 | 0.3 |
Zone-B | ||||||
 Min | 19 | 4.7 | 0.3 | 10 | BDL | BDL |
 Max | 108 | 37.9 | 2.4 | 118 | 3.9 | 1.1 |
 Mean | 39 | 21.2 | 1.3 | 40 | 1.1 | 0.3 |
 SD | 15 | 6.8 | 0.4 | 22 | 1.1 | 0.3 |
Zone-C | ||||||
 Min | 27 | 13.7 | 0.9 | 14 | BDL | BDL |
 Max | 142 | 42.6 | 2.7 | 65 | 5.1 | 1.4 |
 Mean | 47 | 21.8 | 1.4 | 37 | 1.6 | 0.5 |
 SD | 26 | 6.6 | 0.4 | 15 | 1.5 | 0.4 |
Almora | ||||||
Zone-A | ||||||
 Min | 27 | 13.5 | 0.9 | 24 | 0.2 | 0.06 |
 Max | 162 | 33.9 | 2.1 | 113 | 3.5 | 0.97 |
 Mean | 84 | 25.4 | 1.6 | 68 | 2.0 | 0.56 |
 SD | 44 | 6.2 | 0.4 | 34 | 1.2 | 0.33 |
Zone-B | ||||||
 Min | 38 | 6.7 | 0.4 | 9 | BDL | BDL |
 Max | 175 | 55.3 | 3.5 | 182 | 4.1 | 1.1 |
 Mean | 79 | 26.5 | 1.7 | 62 | 1.8 | 0.5 |
 SD | 28 | 9.9 | 0.6 | 33 | 1.1 | 0.3 |
Zone-C | ||||||
 Min | 44 | 8.3 | 0.5 | 22 | 1.4 | 0.4 |
 Max | 184 | 54.2 | 3.4 | 167 | 3.9 | 1.1 |
 Mean | 93 | 26.1 | 1.7 | 79 | 2.3 | 0.6 |
 SD | 35 | 11.2 | 0.7 | 43 | 0.6 | 0.2 |
Bageshwar | ||||||
Zone-A | ||||||
 Min | 29 | 11.8 | 0.7 | 26 | 0.9 | 0.3 |
 Max | 86 | 34.3 | 2.2 | 73 | 2.1 | 0.6 |
 Mean | 48 | 20.8 | 1.3 | 45 | 1.4 | 0.4 |
 SD | 17 | 6.3 | 0.4 | 16 | 0.4 | 0.1 |
Zone-B | ||||||
 Min | 23 | 9.7 | 0.6 | 37 | 1.1 | 0.3 |
 Max | 66 | 30.9 | 2.0 | 112 | 4.0 | 1.1 |
 Mean | 44 | 21.2 | 1.3 | 69 | 0.6 | 0.6 |
 SD | 11 | 5.3 | 0.3 | 23 | 0.7 | 0.2 |
Zone-C | ||||||
 Min | 32 | 12.7 | 0.8 | 29 | 0.7 | 0.2 |
 Max | 114 | 44.1 | 2.8 | 194 | 5.6 | 1.6 |
 Mean | 60 | 24.8 | 1.6 | 86 | 2.4 | 0.7 |
 SD | 21 | 7.1 | 0.5 | 45 | 1.1 | 0.3 |