Table 3 Distribution of radon, thoron, EERC and EETC in different zones of Nainital, Almora and Bageshwar.

From: Features, reasons, and significance of radon and thoron attributable radiological dose in the indoor environment

 

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