Table 2.1

Seasonal Ambient Radon, Bq m-3 for the United States (Arithmetic Average of Three Detectors at Each Site)

Site

Quarter 6 Fall 1990

Quarter 7 Winter 1990

Quarter 8 Spring 1991

Quarter 9 Sum. 1991

Avg. All Quarters

AL

13.7

13.4

7.8

13.3

14.3

AK

11.6

ND

ND

ND

10.2

AR

20.5

15.5

16.0

15.7

16.4

AZ

18.3

18.0

14.6

12.5

16.7

CA

18.5

13.4

10.5

12.5

14.1

CO

16.9

13.2

5.8

3.6

12.8

CT

15.7

13.4

7.5

12.6

14.6

DE

13.7

15.0

7.9

15.9

13.6

FL

9.1

9.0

11.2

18.5

13.7

GA

11.3

14.8

10.1

15.4

15.7

HI

8.5

7.3

6.3

10.2

7.8

IA

20.4

18.3

13.1

20.8

18.8

ID

17.4

23.3

5.9

13.9

15.1

IL

17.5

10.1

11.8

20.5

18.5

IN

13.8

11.5

10.2

15.9

15.2

KY

18.9

14.4

12.7

24.5

17.4

KS

24.7

22.0

15.3

19.2

20.7

LA

6.8

9.7

8.0

9.7

9.8

MA

15.7

13.7

10.7

14.8

14.7

MD

15.2

17.0

11.1

16.8

16.5

ME

17.3

10.5

16.2

17.4

16.4

MI

16.2

11.8

11.5

14.8

13.7

MN

15.0

14.7

10.5

11.7

13.5

MO

20.6

16.2

11.0

14.7

18.5

MS

17.6

9.9

7.5

14.8

13.3

MT

20.2

17.6

12.5

20.1

17.1

NC

11.8

9.3

8.3

ND

12.0

ND

25.2

22.4

18.0

14.1

19.5

NE

22.8

21.7

15.8

24.4

20.1

NH

16.5

11.5

11.8

14.6

14.8

NJ

19.6

11.3

17.4

11.0

15.4

NM

6.7

1.7

4.4

3.9

5.3

NV

12.4

8.5

4.2

ND

8.1

NY

11.5

8.9

12.3

ND

11.5

OH

14.2

9.6

11.6

16.8

13.9

OK

13.3

10.9

25.2

10.6

14.6

OR

13.1

11.2

9.6

11.2

11.7

PA

16.4

11.6

15.5

19.9

17.4

RI

9.0

8.3

15.2

11.5

10.7

SC

13.7

11.8

10.0

15.2

16.5

SD

24.7

23.8

30.7

21.0

21.7

TN

21.2

11.2

10.5

21.1

16.7

TX

13.2

11.7

7.0

8.9

13.8

UT

11.5

14.9

6.4

5.6

10.2

VA

29.5

12.5

13.7

16.2

17.2

VT

14.4

11.0

5.3

14.1

13.4

WA

18.9

14.8

12.8

17.9

17.3

WI

14.6

10.4

15.0

18.6

14.8

WV

19.2

18.4

13.3

27.3

18.4

WY

ND

10.4

10.4

5.2

9.9

Avg.

16.1

13.3

11.6

15.0

14.8



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