Air Quality
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Statewide PM 10 Measures by Air Basin

Estimated number of days over the CA 24-Hour Standard by Air Basin

Air Basins

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

Great Basin Valleys

58.3

41

93.4

43.7

34.6

35.7

38.2

3.2

23.6

26

18.4

34.8

20.3

27.4

20.3

21.1

15.5

23.9

Lake County

0

0

11.5

0

0

0

0

0

18.2

0

0

0

0

0

0

6.1

0

12.7

Lake Tahoe

0

0

0

6.1

*

0

3

*

*

*

*

*

*

*

2

*

0

*

Mojave Desert

36.7

18.1

55.3

18.4

0

19.1

25.6

36.6

13

12.2

0

11.8

19.1

*

12.6

6.1

18.9

0

Mountain Counties

24.9

36.6

18

5.7

0

6

0

0

6.1

18.5

12

*

0

6.1

*

5

0

*

North Central Coast

24.3

*

24.7

40.7

42.5

11.8

18.2

6

30.5

0

11.5

*

*

*

*

*

*

*

North Coast

6.5

23.5

12.1

24.9

0

0

11.8

3.9

23.6

6.1

6

6.1

0

14.9

0

2

0

7.4

Northeast Plateau

*

*

5.7

0

0

0

0

0

24.9

*

0

0

0

*

*

6.1

*

*

Sacramento Valley

42.8

49.9

41

30.6

79.5

42.3

53.3

36.4

68.7

18.4

12.2

24.4

18.7

23.3

13.2

25.2

12.2

19.3

Salton Sea

313.2

311.9

305.3

284.2

219.5

160.1

240.6

219.1

186.8

207.4

55

93.4

210

145.8

183.7

128.2

108.2

81.5

San Diego

108.6

129.3

172.9

150.7

174.5

52.7

159.4

158.6

163.4

146.4

136

138.5

6.1

6

0

61

54.1

24.4

San Francisco Bay Area

42.4

47.6

24.4

18.2

24.5

23.2

77.3

24.2

18.3

6.5

6.1

6.1

6.1

15.2

12.8

3

0

25.8

San Joaquin Valley

195.5

167.9

255.8

167.2

113

146.2

166.8

145.1

182.2

123.4

67.4

116.4

89.4

122.3

138.8

121.4

157.9

145.5

South Central Coast

39.4

18.4

18.6

31.1

54.5

12.1

30.4

51.2

109.9

53.8

45.6

69.6

71.3

98.1

88.3

69.2

77.1

29.5

South Coast

247.5

240.1

228.1

201.4

210.1

198.2

241.1

272.9

205.7

204.6

137.1

145.9

98.2

90.2

128.5

123.8

*

102.5






 

Annual average of daily PM10 concentrations by Air Basin

Air Basins

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

Great Basin Valleys

116.7

63.1

159.3

130.4

68.2

30.1

63

14.5

21.9

22.6

16.5

25.6

19.7

20.5

22.4

20.7

17.6

22

Lake County

10.6

10.2

13.1

10

9.9

9.6

11.6

8.8

13.3

9.3

8.4

8.5

8.8

9.5

9.4

9

8.1

13.7

Lake Tahoe

17.2

16.9

17

17.9

*

14.7

17.1

*

*

*

*

*

*

*

14.6

*

12.6

*

Mojave Desert

33.6

29.7

34

27.8

18.3

26.1

30.4

35.9

22.3

25

18.7

22.3

27.5

*

22.7

18.7

25.2

21.6

Mountain Counties

19.9

29.5

25.8

21

17.2

17.9

17.5

16.2

15.7

23.6

20.3

*

*

16.4

*

16.5

12.3

*

North Central Coast

31.1

*

28.9

31.5

28.2

24.2

24.9

25.4

27.4

22.1

20.6

*

*

*

*

*

*

*

North Coast

23.5

25.4

22.8

22.1

20.6

18.5

21.8

20.6

21.5

18.8

19

20.3

16.8

19.7

14.8

17.3

9.7

17.4

Northeast Plateau

*

*

17.5

12.7

12.8

13.3

13.3

4.6

18.8

*

9.9

10.9

12.4

*

*

12.9

*

*

Sacramento Valley

27.8

30.5

31.8

28.8

35.1

27.9

28.7

28.1

33.4

26.4

21

25.1

24.3

24.8

22.2

24.9

20.6

22

Salton Sea

84.8

87

80.9

79.7

60.3

52.6

71.6

65.5

53.9

65.4

37.7

40.9

63.7

52.3

58.7

46.5

54.2

41.6

San Diego

44.4

47.3

52.4

52.5

51.6

32.1

54

58.4

56.1

53.9

47

46.2

24.3

25.4

23.8

34.4

31.3

26.9

San Francisco Bay Area

27.7

29.6

26.3

24.7

25.9

24.1

35

25.6

24.1

20.3

19.5

20.2

18.8

22.2

20

21.9

18.3

22.1

San Joaquin Valley

53.9

52.3

59.9

52.2

43.6

44.5

56.4

48.5

55.9

46.5

35

44.2

41.4

45.6

47.5

44.1

47.3

48.4

South Central Coast

31.2

28.8

28.5

29.9

29.7

27.8

29.5

33.9

35.8

28.2

25.3

35.9

35.1

42

39.6

36.2

35.5

29

South Coast

60

62.9

56.1

55.1

53.4

50.3

62.2

66.5

55

51.6

41.2

40.3

38.8

40

44.8

43.4

*

41.3







 

Estimated number of days over the US 24-Hour standard by Air Basin

Air Basins

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

Great Basin Valleys

43

38.6

48.5

42.9

45.1

38

45.7

26.3

25.7

30.9

37.5

39.4

33.8

25.7

26.7

29.5

39.1

34

Lake County

0

*

*

*

*

*

*

*

*

*

*

*

*

0

0

0

0

0

Lake Tahoe

0

0

0

0

*

0

*

*

*

*

*

*

*

*

*

0

0

0

Mojave Desert

*

1.1

3.2

2

2

0

2.2

7

*

1

*

0

*

1.1

1

1

2

*

Mountain Counties

0

6.1

0

0

*

0

0.9

0

*

0

0

0

0

0

*

3

0

0

North Central Coast

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

North Coast

0

0

0

*

0

*

*

0

26.7

*

0

0

0

0

0

0

0

1.1

Northeast Plateau

0

0

0

0

0

0

0

6.1

3.1

0

0

0

0

0

0

0

*

*

Sacramento Valley

0

*

*

0

6.1

0

1.1

0

6.6

0

0

0

0

*

0

0

*

6.1

Salton Sea

30.6

6.1

18.3

12.3

*

*

16.3

13

3

18.3

0

2

9.9

6.1

*

*

20.9

*

San Diego

0

0

0

6.1

0

*

0

6.1

6.1

0

0

0

*

0

0

0

0

0

San Francisco Bay Area

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

San Joaquin Valley

0

4

2.9

0

0.9

0

4.2

1.4

4.8

1.9

1

0

0

3.8

8.4

0

0

8.6

South Central Coast

0

0

1

1

0

0

0

6.1

0

0

1

0

2.8

2.9

1.9

0

9.5

9.7

South Coast

0

6.1

0

6.2

0

0

*

*

0

0

*

0

0

2

1

6.6

*

2