Emission Inventory Summary Graphs
Graphs that summarize statewide air toxics emissions.
Number of Pollutants Inventoried with Emission Estimates
Number of Point Sources with Emission Estimates
Number of Nonpoint Source Categories Included in Inventories
Summary of Statewide Air Toxics Emission (Expressed in Million Pounds)
| Pollutant Category | 1996 | 1997 | 1999 | 2002 | 2005 |
|---|---|---|---|---|---|
| PAHs | |||||
| Nonmetal Compounds | |||||
| Metal Compounds | |||||
| Total |
(The results in this table SHOULD NOT be viewed as a trend analysis)
The emission differences among years are mainly due to the improvement of emission inventories. See Factors Causing Differences in Emissions Among Years for details.
2005 Air Toxics Emissions by Principal Source Categories
Mobile sources (onroad and nonroad combined) were responsible for approximately 64% of total emissions. Nonpoint and point sources contributed 21.6% and 14.4% to the total emissions, respectively.
Total air toxics emission in 2005: 146 million pounds.
Contribution of Major Categories to 2005 Point Source Air Toxics Emissions in Minnesota
The following figure shows nine individual point source categories that had more than 2% contributions to the total point source emissions. The largest source category was electric utilities, which accounted for 16.4% of the total point source emissions. The minor source categories which are defined as “Other” sources on the legend below add up to 38.2% of the total point sources.
Total point source air toxics emissions in 2005: 21.0 million pounds.
Contribution of Major Categories to 2005 Nonpoint Source Air Toxics Emissions in Minnesota
The major contributor of nonpoint source emissions was commercial and consumer products usage. About 38.9% of the nonpoint source emissions were attributed to that source category in 2005.
Total nonpoint source air toxics emissions in 2005: 31.7 million pounds.
Contribution of Major Categories to 2005 Onroad Mobile Source Air Toxic Emissions in Minnesota
The largest emission contributor of onroad mobile sources was light duty gasoline vehicles, which accounted for 48.6% of emissions from onroad mobile sources in 2005. Light duty gasoline trucks also contributed a significant portion of emissions from onroad mobile sources.
Total onroad source air toxics emissions: 45.7 million pounds.
Contribution of Major Categories to 2005 Nonroad Mobile Source Air Toxics Emissions in Minnesota
Emissions from recreational equipment were ranked number 1 with a contribution of 50.9% to the total nonroad mobile source emissions. Pleasure craft and lawn and garden equipment together contributed 37.5% to the total.
Total nonroad source air toxics emissions in 2005: 48.0 million pounds.
The data for this page represent the analysis on October 15, 2008. Data for the charts are available in the following spreadsheet files:
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Bar chart Data (toxics-graphs-numbers) - Piechart Data (toxics-graphs-sourcebreak)
Please note that the piecharts above reflect statewide summaries. If you would like county- or facility-specific data, you can search at the Environmental Air Data Access – Point Source Search Web site.
