fellows lake air monitoring siteAddress: 4208 E. Farm Road 66
                Springfield, MO 65803
County: Greene
Date established: 03/20/2008
Pollutant monitored:
Ozone (O3)
Site coordinates
   * Latitude: 37.33146°
   * Longitude: -93.339917°
EPA Site ID: 29-077-0042

The Fellows Lake air monitoring station characterizes ozone
concentrations further downwind of the Springfield area.
Specifically, the Missouri Department of Natural Resources
uses the Fellows Lake monitor to determine exposure
of a segment of Springfield residents. The site meets
the requirement in federal regulations for Missouri to
monitor exposure to ozone of people in the Springfield
metropolitan statistical area.

Ozone (O3) Data*

The federal ozone season runs from March 1 through October 31.
Ground-level ozone forms when pollutants emitted by cars,
factories, power plants and other sources react chemically in the presence of heat and sunlight. Ozone at ground level
is a harmful air pollutant as opposed to ozone in the upper atmosphere, which protects us from ultraviolet light.

As of 2015, the federal standard for ground-level ozone is 70 parts per billion, or 0.070 parts per million.
An area is in compliance if the design value is at or below this standard. A design value for ozone incorporates data
from three years. The department and EPA calculate the design value by 1) ranking the daily eight-hour ozone values
for three consecutive years; 2) extracting the fourth-highest value for each year; and 3) averaging the three figures.

Weekly summary of preliminary data from all ozone sites

Preliminary one-hour averages from Fellows Lake
  • "P" stands for primary monitor. "S" stands for secondary monitor.
  • Data from 10 days ago through current date
  • Central Standard Time
  • Concentrations of pollutant in parts per million (ppm)

Preliminary eight-hour forward-rolling averages from all ozone sites
  • Hourly data equal to average of that hour and the following seven hours.
  • Data from 10 days ago through current date
  • Central Standard Time
  • Concentrations of ozone in parts per million (ppm)
Preliminary one-hour ozone averages from all sites

  • Data from 10 days ago through current date
  • Central Standard Time
  • Concentration of ozone in parts per million (ppm)

2016 list of exceedances

Graph of design values for ozone sites in the Springfield area, beginning in 2003

Additional information about ground-level ozone

*Technical issues can affect ability to deliver quality data.
Click to access a table of symbols indicating technical issues.

Related Links

Missouri's mapped network of air monitoring sites

The 2008 Monitoring Network Plan provides information
on the development of the Fellows Lake monitor.

National standard for pollutants

Real-time views from cameras in Kansas City and St. Louis

Daily Air Quality Forecast (AirNow) shows how current readings
at air monitoring sites rate on the EPA's Air Quality Index.
Click on Missouri in the state box at the top of the home page
to access information.

EPA's Air Sensor Toolbox for Citizen Scientists