Table 5.
Adults | ||||||||||||||||||||||||||||
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Sampling Point |
Pre-lockdown |
Lockdown |
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HQingestion |
HQdermal |
HQingestion |
HQdermal |
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As | Cr | Fe | Cu | Zn | Cd | Pb | As | Cr | Fe | Cu | Zn | Cd | Pb | As | Cr | Fe | Cu | Zn | Cd | Pb | As | Cr | Fe | Cu | Zn | Cd | Pb | |
TSW 1 | 4.286 | 0.190 | 0.024 | 0.135 | 0.085 | 0.057 | 0.286 | 0.056 | 0.411 | 0.001 | 0.002 | 0.002 | 0.309 | 0.005 | 2.381 | 0.190 | 0.018 | 0.129 | 0.076 | 0.057 | 0.163 | 0.031 | 0.411 | 0.001 | 0.002 | 0.002 | 0.309 | 0.003 |
TSW 2 | 7.429 | 0.286 | 0.044 | 0.111 | 0.072 | 0.114 | 0.347 | 0.098 | 0.617 | 0.002 | 0.002 | 0.002 | 0.617 | 0.006 | 3.714 | 0.286 | 0.024 | 0.103 | 0.063 | 0.057 | 0.184 | 0.049 | 0.617 | 0.001 | 0.002 | 0.002 | 0.309 | 0.003 |
TSW 3 | 5.333 | 0.762 | 0.025 | 0.141 | 0.062 | 0.000 | 0.184 | 0.070 | 1.646 | 0.001 | 0.003 | 0.002 | 0.000 | 0.003 | 5.333 | 0.667 | 0.020 | 0.136 | 0.058 | 0.000 | 0.122 | 0.070 | 1.440 | 0.001 | 0.002 | 0.002 | 0.000 | 0.002 |
TSW 4 | 4.286 | 0.286 | 0.020 | 0.114 | 0.056 | 0.057 | 0.122 | 0.056 | 0.617 | 0.001 | 0.002 | 0.002 | 0.309 | 0.002 | 3.238 | 0.286 | 0.019 | 0.109 | 0.054 | 0.057 | 0.082 | 0.043 | 0.617 | 0.001 | 0.002 | 0.001 | 0.309 | 0.001 |
TSW 5 | 7.905 | 0.667 | 0.038 | 0.183 | 0.090 | 0.114 | 0.367 | 0.104 | 1.440 | 0.001 | 0.003 | 0.002 | 0.617 | 0.007 | 4.000 | 0.476 | 0.023 | 0.179 | 0.089 | 0.057 | 0.163 | 0.053 | 1.029 | 0.001 | 0.003 | 0.002 | 0.309 | 0.003 |
TSW 6 | 5.238 | 0.190 | 0.022 | 0.112 | 0.054 | 0.057 | 0.163 | 0.069 | 0.411 | 0.001 | 0.002 | 0.001 | 0.309 | 0.003 | 3.619 | 0.190 | 0.014 | 0.109 | 0.050 | 0.057 | 0.082 | 0.048 | 0.411 | 0.000 | 0.002 | 0.001 | 0.309 | 0.001 |
TSW 7 | 3.333 | 0.190 | 0.012 | 0.088 | 0.062 | 0.000 | 0.122 | 0.044 | 0.411 | 0.000 | 0.002 | 0.002 | 0.000 | 0.002 | 3.333 | 0.190 | 0.010 | 0.079 | 0.058 | 0.000 | 0.082 | 0.044 | 0.411 | 0.000 | 0.001 | 0.002 | 0.000 | 0.001 |
TSW 8 | 1.714 | 0.095 | 0.015 | 0.108 | 0.062 | 0.057 | 0.306 | 0.023 | 0.206 | 0.001 | 0.002 | 0.002 | 0.309 | 0.006 | 1.143 | 0.095 | 0.011 | 0.094 | 0.054 | 0.000 | 0.122 | 0.015 | 0.206 | 0.000 | 0.002 | 0.001 | 0.000 | 0.002 |
TSW 9 | 1.143 | 0.095 | 0.019 | 0.118 | 0.066 | 0.057 | 0.327 | 0.015 | 0.206 | 0.001 | 0.002 | 0.002 | 0.309 | 0.006 | 0.095 | 0.095 | 0.011 | 0.114 | 0.057 | 0.000 | 0.143 | 0.001 | 0.206 | 0.000 | 0.002 | 0.002 | 0.000 | 0.003 |
TSW 10 | 5.333 | 0.286 | 0.022 | 0.123 | 0.075 | 0.057 | 0.245 | 0.070 | 0.617 | 0.001 | 0.002 | 0.002 | 0.309 | 0.004 | 3.143 | 0.286 | 0.013 | 0.118 | 0.063 | 0.000 | 0.122 | 0.041 | 0.617 | 0.000 | 0.002 | 0.002 | 0.000 | 0.002 |
TSW 11 | 5.905 | 0.381 | 0.031 | 0.214 | 0.085 | 0.114 | 0.388 | 0.078 | 0.823 | 0.001 | 0.004 | 0.002 | 0.617 | 0.007 | 3.143 | 0.286 | 0.021 | 0.206 | 0.074 | 0.057 | 0.163 | 0.041 | 0.617 | 0.001 | 0.004 | 0.002 | 0.309 | 0.003 |
TSW 12 | 7.905 | 0.667 | 0.038 | 0.183 | 0.090 | 0.114 | 0.367 | 0.104 | 1.440 | 0.001 | 0.003 | 0.002 | 0.617 | 0.007 | 4.000 | 0.476 | 0.023 | 0.179 | 0.089 | 0.057 | 0.163 | 0.053 | 1.029 | 0.001 | 0.003 | 0.002 | 0.309 | 0.003 |
TSW 13 | 9.048 | 0.381 | 0.031 | 0.151 | 0.075 | 0.114 | 0.245 | 0.119 | 0.823 | 0.001 | 0.003 | 0.002 | 0.617 | 0.004 | 8.476 | 0.190 | 0.025 | 0.090 | 0.062 | 0.057 | 0.184 | 0.112 | 0.411 | 0.001 | 0.002 | 0.002 | 0.309 | 0.003 |
TSW 14 | 6.286 | 0.476 | 0.030 | 0.189 | 0.095 | 0.057 | 0.184 | 0.083 | 1.029 | 0.001 | 0.003 | 0.003 | 0.309 | 0.003 | 5.333 | 0.286 | 0.025 | 0.169 | 0.091 | 0.057 | 0.163 | 0.070 | 0.617 | 0.001 | 0.003 | 0.002 | 0.309 | 0.003 |
TSW 15 | 6.000 | 0.762 | 0.031 | 0.206 | 0.088 | 0.000 | 0.204 | 0.079 | 1.646 | 0.001 | 0.004 | 0.002 | 0.000 | 0.004 | 5.619 | 0.476 | 0.028 | 0.189 | 0.082 | 0.000 | 0.163 | 0.074 | 1.029 | 0.001 | 0.003 | 0.002 | 0.000 | 0.003 |
TSW 16 | 2.095 | 0.571 | 0.025 | 0.183 | 0.088 | 0.114 | 0.184 | 0.028 | 1.234 | 0.001 | 0.003 | 0.002 | 0.617 | 0.003 | 1.524 | 0.571 | 0.020 | 0.211 | 0.078 | 0.057 | 0.122 | 0.020 | 1.234 | 0.001 | 0.004 | 0.002 | 0.309 | 0.002 |
TSW 17 | 8.476 | 0.476 | 0.028 | 0.206 | 0.085 | 0.057 | 0.245 | 0.112 | 1.029 | 0.001 | 0.004 | 0.002 | 0.309 | 0.004 | 8.476 | 0.286 | 0.025 | 0.175 | 0.078 | 0.057 | 0.184 | 0.112 | 0.617 | 0.001 | 0.003 | 0.002 | 0.309 | 0.003 |
TSW 18 | 9.429 | 0.762 | 0.024 | 0.183 | 0.094 | 0.057 | 0.224 | 0.124 | 1.646 | 0.001 | 0.003 | 0.003 | 0.309 | 0.004 | 9.333 | 0.571 | 0.024 | 0.169 | 0.091 | 0.057 | 0.184 | 0.123 | 1.234 | 0.001 | 0.003 | 0.002 | 0.309 | 0.003 |
TSW 19 | 6.286 | 0.571 | 0.031 | 0.166 | 0.093 | 0.114 | 0.224 | 0.083 | 1.234 | 0.001 | 0.003 | 0.003 | 0.617 | 0.004 | 5.333 | 0.476 | 0.028 | 0.151 | 0.091 | 0.057 | 0.184 | 0.070 | 1.029 | 0.001 | 0.003 | 0.002 | 0.309 | 0.003 |
TSW 20 | 8.762 | 0.571 | 0.038 | 0.203 | 0.094 | 0.057 | 0.245 | 0.115 | 1.234 | 0.001 | 0.004 | 0.003 | 0.309 | 0.004 | 8.000 | 0.476 | 0.031 | 0.166 | 0.095 | 0.057 | 0.163 | 0.105 | 1.029 | 0.001 | 0.003 | 0.003 | 0.309 | 0.003 |
Min | 1.143 | 0.095 | 0.012 | 0.088 | 0.054 | 0.000 | 0.122 | 0.015 | 0.206 | 0.000 | 0.002 | 0.001 | 0.000 | 0.002 | 0.095 | 0.095 | 0.010 | 0.079 | 0.050 | 0.000 | 0.082 | 0.001 | 0.206 | 0.000 | 0.001 | 0.001 | 0.000 | 0.001 |
Max | 9.429 | 0.762 | 0.044 | 0.214 | 0.095 | 0.114 | 0.388 | 0.124 | 1.646 | 0.002 | 0.004 | 0.003 | 0.617 | 0.007 | 9.333 | 0.667 | 0.031 | 0.211 | 0.095 | 0.057 | 0.184 | 0.123 | 1.440 | 0.001 | 0.004 | 0.003 | 0.309 | 0.003 |
Mean | 5.762 | 0.433 | 0.027 | 0.155 | 0.078 | 0.068 | 0.250 | 0.076 | 0.935 | 0.001 | 0.003 | 0.002 | 0.365 | 0.004 | 4.485 | 0.346 | 0.021 | 0.144 | 0.073 | 0.039 | 0.146 | 0.059 | 0.748 | 0.001 | 0.003 | 0.002 | 0.210 | 0.003 |
% of samples exceed the limit | 100 | Nil | Nil | Nil | Nil | Nil | Nil | Nil | 50 | Nil | Nil | Nil | Nil | Nil | 95 | Nil | Nil | Nil | Nil | Nil | Nil | Nil | 40 | Nil | Nil | Nil | Nil | Nil |