1 status of indiana air quality southeast indiana region
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Status of Indiana Air Quality
SoutheastIndiana Region
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Lead
2* Lead Standard Lowered to 0.15 µg/m3 in 2008.
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Nitrogen Dioxide
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Nitrogen Dioxide
* 1-Hour NO2 Standard Established in 2010.
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Ozone
5* 1-Hour Ozone Standard Revoked in 2005.
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Ozone
6* 8-Hour Ozone Standard Established in 1997.
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Changing Particulate Standards
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Name Total Suspended PM10 PM2.5
Particle (TSP)
Dates 1970-1987 1983-Present 1999-Present
Regulated Size 30 µm 10 µm 2.5 µm
24-Hour Standard 260 150 65 (1999-2005)
35 (2006-Present)
Annual Standard 75 50 15
*µm = micrograms
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Particulate Matter
8*Annual TSP Standard Revoked in 1987.
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Particulate Matter
9*24-Hour TSP Standard Revoked in 1987.
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Particulate Matter
10*Annual PM10 Standard Established in 1987 and Revoked in 2006.
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Particulate Matter
11*24-Hour PM10 Standard Established in 1987.
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Particulate Matter
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Particulate Matter
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Sulfur Dioxide
14* Annual SO2 Standard Revoked in 2010.
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Sulfur Dioxide
15* 24-Hour SO2 Standard Revoked in 2010.
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Sulfur Dioxide
16* 1-Hour SO2 Standard Established in 2010.
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Air Quality and You
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• 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
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Contact Information for IDEM’s Office of Air Quality
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• To call please dial: (317) 233-0178
• To write, please use this mailing address:IDEM, Office of Air Quality100 North Senate AvenueIndianapolis, IN 46204