Environmental Services Program

James River South, Springfield

Site Operator: City Utilities of Springfield

Pollutants Monitored: Sulfur Dioxide (SO2)

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Sulfur Dioxide (SO2)

Updated: Monthly

National Ambient Air Monitoring Standard: A three-hour average of 0.50 ppm (parts per million) and/or a 24-hour average of 0.14 ppm (parts per million) and/or an annual average of 0.03 ppm (parts per million). Data reported in three decimal places must be rounded to two decimal places.

Exceedances allowed without a violation being recorded: One per year.

Disclaimer: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency. Monthly data and data shown graphically is raw, unreviewed and unvalidated data.

The units in this section are reported in parts per billion.
Year	Number of Exceedances	Annual Average	Maximum 1-Hour Average	Maximum 24-Hour Average	99th Percentile 1-Hour Average
2012
First Quarter	0	1.41	48.8	12.8	34.8
Second Quarter	0
Third Quarter	0
2011	0	1.81	112.0	38.4	69.5
2010	0	2.63	115.0	41.8	98.0
The units for all averages in the lower portion of this chart are parts per million.
Year	Number of Exceedances	Annual Average	Maximum 24-Hour Average	Maximum 3-Hour Average	Maximum 1-Hour Average
1995	0	0.008	0.0980	0.242	0.302
1996	1	0.008	0.215	0.358	0.530
1997	0	0.008	0.067	0.228	0.264
1998	0	0.004	0.045	0.087	0.128
1999	0	0.003	0.048	0.083	0.125
2000	0	0.004	0.103	0.180	0.187
2001	0	0.003	0.089	0.138	0.171
2002	0	0.0032	0.061	0.113	0.144
2003	0	0.0032	0.032	0.073	0.106
2004	0	0.0029	0.041	0.075	0.084
2005	0	0.0030	0.041	0.099	0.122
2006	0	0.0032	0.055	0.086	0.120
2007	0	0.0025	0.035	0.088	0.106
2008	0	0.0034	0.066	0.098	0.112
2009	0	0.0025	0.024	0.065	0.111

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