Table 2.1

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

Site

Quarter 1 Sum. 1989

Quarter 2 Fall 1989

Quarter 3 Winter 1989

Quarter 4 Spring 1990

Quarter 5 Sum. 1990

AL

13.3

16.4

12.5

12.0

26.5

AK

12.7

6.8

10.6

8.5

11.1

AR

11.7

21.6

19.5

11.8

15.2

AZ

8.8

16.2

28.5

20.0

13.6

CA

11.8

16.8

20.5

11.3

11.7

CO

12.3

27.5

17.3

8.0

10.5

CT

13.4

25.9

13.0

ND

15.4

DE

17.5

13.9

13.6

10.5

13.9

FL

25.9

14.7

14.1

9.6

11.0

GA

14.8

28.7

19.0

13.9

13.0

HI

9.5

6.8

7.0

5.9

8.9

IA

24.8

14.6

25.9

14.1

17.3

ID

13.3

16.3

27.4

9.1

9.7

IL

22.7

21.8

24.8

16.5

20.5

IN

19.4

15.7

15.0

19.6

15.7

KY

19.5

16.4

20.0

11.6

18.6

KS

27.3

19.2

23.4

15.8

19.6

LA

17.4

13.8

8.3

5.7

9.1

MA

22.9

17.0

15.2

8.0

14.4

MD

ND

19.7

22.6

12.7

16.7

ME

19.2

18.1

20.1

13.2

15.4

MI

16.3

12.1

15.3

10.5

14.9

MN

18.5

14.1

17.6

8.8

10.6

MO

17.4

28.0

25.3

17.0

16.7

MS

15.5

16.0

11.0

11.7

15.7

MT

12.8

18.9

17.0

15.3

19.4

NC

18.7

14.6

15.9

5.3

12.2

ND

19.4

27.5

19.1

15.5

14.7

NE

20.0

22.0

21.2

14.6

18.7

NH

24.4

15.4

14.1

10.1

15.0

NJ

15.3

18.5

17.4

12.5

15.7

NM

7.8

6.2

10.2

2.5

4.4

NV

5.1

10.0

12.6

5.7

6.3

NY

12.7

11.8

15.0

9.3

10.4

OH

16.9

14.1

19.7

10.1

12.2

OK

10.4

13.4

13.6

10.4

23.8

OR

ND

9.0

17.5

10.2

11.6

PA

20.9

21.5

24.2

10.0

16.5

RI

ND

5.1

16.3

10.6

9.7

SC

15.4

35.9

17.5

12.2

16.7

SD

17.9

21.2

21.7

16.0

18.5

TN

17.3

18.0

19.8

11.1

20.2

TX

17.9

17.0

21.1

7.0

20.7

UT

7.8

15.0

15.2

5.9

9.3

VA

14.6

20.0

16.2

13.9

18.6

VT

18.9

14.1

14.3

13.8

15.0

WA

15.0

24.9

16.0

14.3

20.8

WI

13.4

22.4

15.0

11.2

13.0

WV

22.0

11.6

ND

15.0

20.5

WY

7.4

16.7

ND

8.8

10.5

Avg.

16.1

17.3

17.5

11.4

14.8



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