Address: 13131 Highway 169
Kansas City, MO 64165
County: Clay
Pollutant monitored: Ozone (O3)
Pollutant no longer monitored: Nitrogen Dioxide (NO2) monitored from 2002-2004.
(You may request records regarding historically monitored pollutants.)
Date established: March 19, 2002
Site coordinates
* Latitude: 39.33188
* Longitude: -94.58069
EPA Site ID: 29-047-0006

The department established the Rocky Creek station in 2002, two years after assessing its ozone network and outlining its plan to expand monitoring. The air monitoring station lies north of the Kansas City downtown area and west of the department's Watkins Mill and Liberty monitors. It helps characterize ozone concentrations downwind of the Kansas City area; determine ozone exposure for the Kansas City metropolitan statistical area (MSA) and monitor attainment of the ambient air quality standards.

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 (ppm). 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 from beginning of ozone season
• Running list of exceedances from beginning of season
• Monthly number of exceedances, 2016 and 2017
• Daily maximum average eight-hour concentration for each site from beginning of season

Preliminary data from Rocky Creek in parts per million
• "P" stands for primary monitor; "S" for secondary monitor.
• Data from 10 days ago through current date
• Central Standard Time

Preliminary eight-hour forward-rolling averages in parts per million 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

Preliminary one-hour ozone averages from all sites in parts per million

• Data from 10 days ago through current date
• Central Standard Time

Graph of ozone design values using data from Kansas City sites, beginning in 2003

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