Address:  1802 E. 203rd St.
                 Belton, MO 64012
County: Cass
Date established: Jan. 1, 2000
Pollutants monitored: Ozone (O3) and fine particulate matter (PM2.5)
Pollutant no longer monitored: Particulate matter (PM10)
(For information, go to dnr.mo.gov/sunshinerequests.htm.)
Site coordinates
   * Latitude: 38.759610°
   * Longitude: -94.579830
Site ID: 29-037-0003

The Richards-Gebaur South air monitor sits on land that once housed the Richards-Gebaur Air Force Base, named after two Kansas City area veterans. The air monitoring station
is located upwind of the Kansas City metropolitan statistical area, so it helps determine ozone and PM2.5 concentrations in the region — usually before gusts of wind enter the Kansas City metropolitan area.

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
   * Eight-hour ozone design values
   * Four highest eight-hour ozone values since beginning of ozone season
   * Exceedances during current ozone season
   * Daily eight-hour average maximums since beginning of ozone season

Preliminary one-hour averages from Richards-Gebaur South
   * Ozone data in third and fourth columns. "P" stands for primary monitor. "S" stands for secondary monitor
   * Data from 10 days ago through current date
   * Central Standard Time
   * Concentration of ozone 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
   * Concentration 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 Kansas City area, beginning in 2003

Additional information about ground-level ozone

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

Fine particulate matter refers to microscopic particles that measure 2.5 micrometers in diameter and smaller. The average human hair is 30 times larger than the largest fine particle. These minute particles consist of a combination of solids and liquid droplets. Sources include fires, smokestacks, unpaved roads and construction sites. These particles can lodge themselves in someone's respiratory system and cause problems with breathing. They even may enter someone's bloodstream.

EPA uses two ways to determine compliance with PM2.5 federal standards. One looks at data over a 24-hour period,
and the other takes into account data from a whole year.

In December 2012, EPA made the annual PM2.5 standard more stringent, setting it at 12 micrograms
per cubic meter, based on the three-year average of annual means. At that same time, EPA
retained the 24-hour PM2.5 standard of 35 micrograms per cubic meter, based
on the 98th percentile of 24-hour measurements, averaged over three years.

Weekly summary of preliminary data from all PM2.5 sites

Preliminary up-to-date one-hour averages from Richards-Gebaur South
    * PM2.5 data in eighth column of first page. Each day has two pages of data.
    * Data from past 10 days through current date
    * Central Standard Time

Preliminary up-to-date one-hour averages from all PM2.5 sites
    * Data from past three days through current date
    * Central Standard Time

Graph of PM2.5 annual design values from Kansas City sites, beginning in 2003

Graph of PM2.5 24-hour design values from Kansas City sites, beginning in 2003

Additional information about fine particulate matter

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