Transcript Status of Indiana Air Quality Lower Northwest Indiana Region Ozone Concentration (ppm) 1-Hour Ozone 4th High Values Lower Northwest Indiana 0.130 0.120 0.110 0.100 0.090 0.080 0.070 1-Hour Ozone 4th High Values * 1-Hour Ozone.

Status of Indiana
Air Quality
Lower Northwest
Indiana Region
1
Ozone
Concentration (ppm)
1-Hour Ozone 4th High Values
Lower Northwest Indiana
0.130
0.120
0.110
0.100
0.090
0.080
0.070
1-Hour Ozone 4th High Values
* 1-Hour Ozone Standard Revoked in 2005.
1-Hour Ozone Standard (0.12 ppm)
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
0.060
Trendline
2
Ozone
8-Hour Ozone 4th High Values
Lower Northwest Indiana
Concentration (ppm)
0.100
0.090
0.080
0.070
0.060
0.050
8-Hour 4th High Values
1997 8-Hour Ozone Standard (.085 ppm)
2008 8-Hour Ozone Standard (.075 ppm)
Trendline
* 8-Hour Ozone Standard Established in 1997.
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
0.040
3
Changing Particulate Standards
Name
Total Suspended
Particle (TSP)
Dates
1970-1987
1983-Present
1999-Present
30 µm
10 µm
2.5 µm
260
150
65 (1999-2005)
35 (2006-Present)
75
50
15
Regulated Size
24-Hour Standard
Annual Standard
*µm = micrograms
PM10
PM2.5
4
Particulate Matter
Annual Geometric Mean TSP Values
Lower Northwest Indiana
80
Concentration (µg/m³)
70
60
50
40
30
20
10
Annual Geometric Means
*Annual TSP Standard Revoked in 1987.
Annual TSP Standard (75 µg/m³)
1988
1987
1986
1985
1984
1983
1982
1981
1980
0
Trendline
5
Particulate Matter
24-Hour TSP 2nd High Values
Lower Northwest Indiana
Concentration (µg/m³)
300
250
200
150
100
50
24-Hour 2nd High Values
*24-Hour TSP Standard Revoked in 1987.
24-Hour TSP Standard (260 µg/m³)
1988
1987
1986
1985
1984
1983
1982
1981
1980
0
Trendline
6
Particulate Matter
Annual Arithmetic Mean PM2.5 Values
Lower Northwest Indiana
15
10
5
Annual Arithmetic Means
Annual PM₂.₅ Standard (15 µg/m³)
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
0
2000
Concentration (µg/m3)
20
Trendline
7
Particulate Matter
24-Hour PM2.5 98th Percentile Values
Lower Northwest Indiana
60
50
40
30
20
10
24-Hour 98th Percentile Values
2006 24-Hour PM₂.₅ Standard (35 µg/m³)
1997 24-Hour PM₂.₅ Standard (65 µg/m³)
Trendline
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
0
2000
Concentration (µg/m³)
70
8
Sulfur Dioxide
0.035
Annual Arithmetic Mean SO2 Values
Lower Northwest Indiana
Concentration (ppm)
0.030
0.025
0.020
0.015
0.010
0.005
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
0.000
Annual Arithmetic Means
*Annual SO2 Standard Revoked in 2010.
Annual SO₂ Standard (0.03 ppm)
Trendline
9
Sulfur Dioxide
24-Hour SO2 2nd High Values
Lower Northwest Indiana
0.160
Concentration (ppm)
0.140
0.120
0.100
0.080
0.060
0.040
0.020
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
0.000
24-Hour 2nd High Values
*24-Hour SO2 Standard Revoked in 2010.
24-Hour SO₂ Standard (0.140 ppm)
Trendline
10
Sulfur Dioxide
Highest 1-Hour SO2 99th Percentile Values
Lower Northwest Indiana
Concentration (ppb)
350
300
250
200
150
100
50
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
0
1-Hour 99th Percentil Values
*1-Hour SO2 Standard Established in 2010.
1-Hour SO₂ Standard (75 ppb)
Trendline
11
Air Quality and You
• To learn more about your air quality and what
you can do to help, visit:
Smogwatch.IN.gov
• To acquire additional information about air
quality in Indiana and IDEM’s role, visit:
www.idem.IN.gov
12
Contact Information
for IDEM’s Office of Air Quality
• To call please dial:
(317) 233-0178
• To write, please use this mailing address:
IDEM, Office of Air Quality
100 North Senate Avenue
Indianapolis, IN 46204
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