The graphs on this page represent a comparison of the 24 hour particulate concentrations measured with continuous instruments (FDMS) used for near real-time data reporting against daily (24 hour) values measured with Federal Reference Method (FRM) filter based samplers. The real-time data values represent the best estimate of what the FRM values will be based on historic data. FRM sample values are generally available about 1 month after the sampling date.

Davenport, 10th & Vine PM 2.5 - Cold Weather FDMS v FRM (October-April 2008-09)

Equation: y=1.049x , R(squared)=0.924
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Warm Weather FDMS v FRM (May-September 2008)

Equation: y=1.113x , R(squared)=0.974
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Cold Weather FDMS v FRM (October-April 2007-08)

Equation: y=1.130x , R(squared)=0.953
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Warm Weather FDMS v FRM (May-September 2007)

Equation: y=1.1134x , R(squared)=0.9576
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Cold Weather FDMS v FRM (October-April 2006-07)

Equation: y=0.8032x , R(squared)=0.7981
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Warm Weather FDMS v FRM (May-September 2006)

Equation: y=1.0207x , R(squared)=0.942
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Cold Weather FDMS v FRM (October-April 2005-06)

Equation: y=1.0292x , R(squared)=0.9089
Units measured in µg/m³ - Micrograms per Cubic Meter of Air

Davenport, 10th & Vine PM 2.5 - Warm Weather FDMS v FRM (May-September 2005)

Equation: y=1.0497x , R(squared)=0.9861
Units measured in µg/m³ - Micrograms per Cubic Meter of Air