Ameren UE established the Rush Island Natchez air monitoring station near its Rush Island Energy Center in Festus. Ameren owns and operates the monitoring site under a quality assurance project plan (QAPP) approved by the Missouri Department of Natural Resources. The Missouri Department of Natural Resources provides quality assurance. Environmental specialists with the department conduct periodic on-site performance audits, just as they do at state-operated sites
This monitor is one of three sites monitoring the area around Rush Island, which fulfills a consent agreement between the department and Ameren. The department also may use the data for other purposes, depending on EPA's implementation of the 2010 one-hour SO2 standard and the strategy developed for Jefferson County to comply with the standard.
To learn about other air monitoring sites the department operates as part of the state's ambient air monitoring network, visit Air Monitoring Sites.
Pollutants
Sulfur Dioxide
In 2010, EPA not only established a new one-hour standard, but also introduced a new form for determining compliance. The primary National Ambient Air Quality Standard (NAAQS), based on health effects, for SO2 is 75 parts per billion (ppb) averaged over one hour. The new form requires three years of data — the average SO2 concentration from each hour of the year. The department and EPA calculate the design value, using the 99th percentile of one-hour daily maximum concentrations, averaged over three years.
*All times listed in reports reflect Central Standard Time (CST).
- One-hour SO2 design values
- Four highest one-hour SO2 values year-to-date
- Map of Missouri's SO2 monitoring sites
Additional information about Sulfur Dioxide State Planning efforts
Technical issues can affect ability to deliver quality data. Access a table of symbols with explanation of the problems they represent.
917 Natchez Trace Drive
Bloomsdale, MO 63627
United States
Air Pollution Control Program
Division of Environmental Quality
P.O. Box 176
Jefferson City, MO 65102-0176
United States