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40 CFR Part 53, Table F-6 — Estimated Mass Concentration Measurement of PM 2.5 for Idealized Fine Aerosol Size Distribution

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Particle Aerodynamic Diameter (µm)Test SamplerIdeal Sampler
Fractional Sampling EffectivenessInterval Mass Concentration (µg/m3)Estimated Mass Concentration Measurement (µg/m3) | Fractional Sampling Effectiveness | Interval Mass Concentration (µg/m3) | Estimated Mass Concentration Measurement (µg/m3)
(1)(2)(3) | (4) | (5) | (6) | (7)
<0.500118.868 | | 1 | 18.868 | 18.868
0.625| 13.412| 0.999 | 13.412 | 13.399
0.75| 8.014| 0.998 | 8.014 | 7.998
0.875| 6.984| 0.997 | 6.984 | 6.963
1| 5.954| 0.995 | 5.954 | 5.924
1.125| 5.015| 0.991 | 5.015 | 4.97
1.25| 4.197| 0.987 | 4.197 | 4.142
1.375| 3.503| 0.98 | 3.503 | 3.433
1.5| 2.921| 0.969 | 2.921 | 2.83
1.675| 2.438| 0.954 | 2.438 | 2.326
1.75| 2.039| 0.932 | 2.039 | 1.9
1.875| 1.709| 0.899 | 1.709 | 1.536
2| 1.437| 0.854 | 1.437 | 1.227
2.125| 1.212| 0.791 | 1.212 | 0.959
2.25| 1.026| 0.707 | 1.026 | 0.725
2.375| 0.873| 0.602 | 0.873 | 0.526
2.5| 0.745| 0.48 | 0.745 | 0.358
2.625| 0.638| 0.351 | 0.638 | 0.224
2.75| 0.55| 0.23 | 0.55 | 0.127
2.875| 0.476| 0.133 | 0.476 | 0.063
3| 0.414| 0.067 | 0.414 | 0.028
3.125| 0.362| 0.03 | 0.362 | 0.011
3.25| 0.319| 0.012 | 0.319 | 0.004
3.375| 0.282| 0.004 | 0.282 | 0.001
3.5| 0.252| 0.001 | 0.252 | 0
3.625| 0.226| 0 | 0.226 | 0
3.75| 0.204| 0 | 0.204 | 0
3.875| 0.185| 0 | 0.185 | 0
4| 0.17| 0 | 0.17 | 0
4.125| 0.157| 0 | 0.157 | 0
4.25| 0.146| 0 | 0.146 | 0
4.375| 0.136| 0 | 0.136 | 0
4.5| 0.129| 0 | 0.129 | 0
4.625| 0.122| 0 | 0.122 | 0
4.75| 0.117| 0 | 0.117 | 0
4.875| 0.112| 0 | 0.112 | 0
5| 0.108| 0 | 0.108 | 0
5.125| 0.105| 0 | 0.105 | 0
5.25| 0.102| 0 | 0.102 | 0
5.375| 0.1| 0 | 0.1 | 0
5.5| 0.098| 0 | 0.098 | 0
5.625| 0.097| 0 | 0.097 | 0
5.75| 0.096| 0 | 0.096 | 0
Csam(exp)= | | | Cideal(exp)= | 78.539