Annual Statewide Arsenic Summary

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ARB:

AQD:


	Annual Statewide Toxics Summary
	Arsenic
	nanograms per cubic meter

Year

Months
Present

Minimum

Median

90th
Percentile

Maximum

Standard
Deviation

Number of
Observations

Detection
Limit

Estimated
Risk

2000

0.2

0.8

2.0

7.7

0.96

84

0.2

1999

0.1

0.9

1.09

2.0

6.5

0.96

167

0.2

4

1998

0.1

0.8

1.02

2.1

6.9

0.85

196

0.2

3

1997

0.2

0.9

1.14

2.2

7.3

0.84

178

0.2

4

1996

0.1

0.6

0.96

1.8

4.9

0.75

406

0.2

3

1995

0.1

0.7

0.87

1.7

13

0.85

621

0.2

3

1994

0.1

0.8

1.33

2.3

43

2.75

656

0.2

4

1993

0.1

0.8

1.36

2.4

36

3.06

675

0.2

4

1992

0

1991

0.2

0.5

1.3

3.4

0.58

428

0.4

1990

0.2

0.9

1.20

2.3

14.2

1.20

544

0.4

4

1989

0.2

1.1

1.39

2.5

9.3

1.32

226

0.4

5



	Notes:	Values below the Limit of Detection (LoD) assumed to be ½ LoD. Means and risks shown only for years with data in all 12 months. Risks shown only for those substances with unit risk factors.