| Sample locations | Sample points | Mean Concentration of emission level in the study area | |||||||||||||||
| CO2 (mg/m3) | NO2 (mg/m3) | CO (mg/m3) | PM 2.5 (μg/m3) | PM 10 (μg/m3) | |||||||||||||
| Time | Morning (7-10 am) | Afternoon (2-5 pm) | Morning (7-10 am) | Afternoon (2-5 pm) | Morning (7-10 am) | Afternoon (2-5 pm) | Morning (7-10 am) | Afternoon (2-5 pm) | Morning (7-10 am) | Afternoon (2-5 pm) | |||||||
| SM1: Amakohia Market (day1) | SP1 SP2 SP3 | 1187 1187 1142 | 1145 1160 1160 | 0.121 0.076 0.121 | 0.100 0.082 0.082 | 0.14 0.33 0.18 | 0.100 0.250 0.180 | 0.014 0.020 0.019 | 0.010 0.015 0.014 | 0.035 0.032 0.014 | 0.030 0.030 0.021 | ||||||
| SM1: Amakohia Market (day 2) | SP1 SP2 SP3 | 1177 1177 1120 | 1162 1162 1140 | 0.121 0.115 0.112 | 0.110 0.120 0.120 | 0.120 0.280 0.250 | 0.140 0.155 0.155 | 0.014 0.018 0.019 | 0.015 0.018 0.020 | 0.025 0.028 0.015 | 0.020 0.029 0.032 | ||||||
| SM1: Amakohia Market (day 3) | SP1 SP2 SP3 | 1170 1180 1180 | 1140 1149 1155 | 0.120 0.115 0.120 | 0.090 0.090 0.090 | 0.110 0.150 0.180 | 0.180 0.180 0.200 | 0.014 0.020 0.018 | 0.012 0.010 0.015 | 0.020 0.020 0.024 | 0.014 0.020 0.020 | ||||||
| SM2: Relief Market (day 1) | SP1 SP2 SP3 | 1263 1254 1232 | 1187 1200 1230 | 0.143 0.104 0.131 | 0.115 0.104 0.130 | 0.01 0.00 0.08 | 0.03 0.05 0.00 | 0.029 0.015 0.026 | 0.020 0.015 0.019 | 0.207 0.035 0.149 | 0.200 0.080 0.100 | ||||||
| SM2: Relief Market (day 2) | SP1 SP2 SP3 | 1187 1236 1250 | 1230 1220 1245 | 0.530 0.216 0.146 | 0.216 0.184 0.180 | 0.010 0.040 0.090 | 0.020 0.025 0.015 | 0.022 0.021 0.025 | 0.020 0.021 0.025 | 0.078 0.065 0.051 | 0.104 0.080 0.095 | ||||||
| SM2: Relief Market (day 3) | SP1 SP2 SP3 | 1200 1263 1220 | 1190 1200 1200 | 0.145 0.185 0.150 | 0.140 0.150 0.149 | 0.040 0.040 0.045 | 0.030 0.030 0.029 | 0.015 0.011 0.015 | 0.010 0.015 0.019 | 0.180 0.165 0.170 | 0.150 0.145 0.120 | ||||||
| SM3: Alaba market (day 1) | SP1 SP2 SP3 | 1187 1146 1187 | 1200 1223 1245 | 0.082 0.127 0.107 | 0.085 0.092 0.107 | 0.350 0.360 0.390 | 0.350 0.300 0.380 | 0.011 0.014 0.019 | 0.015 0.020 0.019 | 0.015 0.027 0.037 | 0.020 0.025 0.032 | ||||||
| SM3: Alaba market (day 2) | SP1 SP2 SP3 | 1145 1170 1175 | 1880 1870 1875 | 0.127 0.104 0.098 | 0.110 0.115 0.120 | 0.380 0.380 0.400 | 0.350 0.300 0.320 | 0.015 0.014 0.019 | 0.015 0.011 0.015 | 0.014 0.025 0.030 | 0.014 0.020 0.022 | ||||||
| SM3: Alaba market (day 3) | SP1 SP2 SP3 | 1770 1180 1200 | 1145 1145 1170 | 0.115 0.127 0.130 | 0.095 0.114 0.098 | 0.290 0.290 0.300 | 0.360 0.360 0.340 | 0.010 0.015 0.019 | 0.015 0.020 0.018 | 0.015 0.020 0.028 | 0.015 0.021 0.028 | ||||||
| NAAQS | 0.100 PPM (188 μg/m3 (1-Hour) | 35 ppm (40 mg/m3) (1-hour) | 35 μg/m3 (24 Hr) | 150 μg/m3 (24 Hr) | |||||||||||||
| WHO, 2017 | 0.2 - 0.5 mg/m3 (1 Hr) | 30 mg/m3 (1 Hr) | PM 10 (150 μg/m3 for 24 Hr) and PM 2.5 (75 μg/m3 for 24 Hr) Based on WHO interim target 1 | ||||||||||||||