State site: Carthage, southwest Missouri
Address: 530 Juniper Road
Carthage, MO 64836
Date of establishment: Jan. 1, 1999
Pollutant monitored: Particulate matter (PM10)
Pollutants historically monitored: Ozone from April 4, 2008 – Oct. 31, 2009; fine particulate matter (PM2.5) from Jan. 1, 1999 – Feb. 27, 2004
(For information, please file a Sunshine Law request. Go to dnr.mo.gov/sunshinerequests.htm.)
* Latitude: 37.198286°
* Longitude: -94.317246
EPA ID: 29-097-0003
Located near an industrial facility, the state's air monitoring station in Carthage helps to determine exposure of a population segment to air pollutants from that source.
PM10 refers to airborne particles smaller than 10 micrometers in diameter. People may inhale these particles, but they are invisible to the naked eye. By comparison, the average human hair is seven times larger than the biggest particles in this size range. Examples of these airborne particles include microscopic mold, dust and pollen. The general public may encounter particulate matter of this size near roads and industries, among other areas.
The EPA has set a standard for PM10 at 150 micrograms per cubic meter of ambient air (150 µg/m3), averaged over a 24-hour day. A site does not meet this standard if it exceeds the level more than once per year, averaged over a three-year period. The PM10 standard is expressed as “expected number of days exceeding the standard.” The word expected is used because PM10 is not always measured every day.
Preliminary one-hour averages from Carthage site
• PM10 data in third column
• Data from 10 days ago through current date
• Central Standard Time
Preliminary data from all PM10 sites
• Data from past three days through current date
• Central Standard Time
Graph of PM10 design values for all sites, beginning in 2003
Department's webpage about particulate matter
• Description of two groups of particulate matter: PM2.5 and PM10
• 1997, 2006 and 2012 standards for PM2.5 plus related documents
• 2006 PM10 standard and pertinent documents
* Technical issues can affect ability to deliver quality data.
Access a table of symbols indicating issues.
Department's webpage regarding air quality
• EPA's current and daily forecasts for St. Louis, Kansas City and Springfield
• Information on EPA's Air Quality Index
• Tips for improving air quality
• Suggestions for breathing better on action days — days forecasted orange (unhealthy for sensitive groups) to maroon (hazardous)
Daily Air Quality Forecast (AirNow)
• EPA's forecasts for all parts of the country