Field Validation of a Public Health Particulate Matter (PHPM) Low-Cost PM_2.5 Monitor and Commercial Sensors with Light Scattering Technology

Table 3

Pearson’s correlation coefficient, , for each sampling location and summary statistics of measured PM_2.5 concentrations.

Site	Observed PM2.5 in DustTrak 8533 (μg/m^3)^†	Estimated PM2.5 in PHPM (μg/m^3)^†	Correlation,
Chamber	241.8 (102-477)	139.3 (50-804)	0.71
University campus	143.2 (48-325)	53.6 (10-116)	0.93
Urban center	240.8 (112-388)	109.2 (48-188)	0.92
Rural industrial	292.6 (85-602)	113.9 (34-220)	0.90

^†Average and range (in parentheses) are reported.