Air Quality and Human Health Risk Assessment in the Residential Areas at the Proximity of the Nkolfoulou Landfill in Yaoundé Metropolis, Cameroon

Table 2

Concentration of particulate matter at the monitoring sites (n = 24).

Site code	PM2.5 (μg/m^3)			PM10 (μg/m^3)
	Range of hourly mean		Daily mean	Range of hourly mean		Daily mean
	Min	Max		Min	Max
RA0	10.50	17.50	12.85	18.90	31.50	23.12
RA1	12.09	22.34	19.19	25.39	46.91	40.29
RA2	12.50	39.50	32.75	35.00	110.60	91.34
RA3	18.20	44.02	37.57	47.32	114.45	97.69
RA4	12.57	21.75	19.23	18.86	42.63	35.71
RA5	13.40	22.58	20.49	28.14	47.42	43.04
RA6	14.20	36.80	31.89	36.92	95.68	82.91
RA7	13.91	21.56	19.56	29.21	45.28	41.07
RA8	12.20	23.19	20.36	24.16	45.92	40.32
RA9	9.53	21.35	18.59	20.34	40.65	37.84
RA10	11.64	24.82	21.63	26.70	42.95	28.84

RA = residential area; ND = not detected; n = number of measurements per day (24 hours).