Element Year Max Min Average Standard deviation Coefficient of variation Kurtosis Skewness Standarda
Cd 2008 0.52 0.05 0.18 0.06 0.328 4.553 0.973 0.172
2017 0.90 0.04 0.29 0.12 0.415 3.213 1.153
Pb 2008 101.04 17.60 42.71 10.13 0.237 6.368 1.292 23.1
2017 299.13 14.61 39.24 30.42 0.775 38.339 5.720
As 2008 27.34 0.34 6.85 2.66 0.389 17.042 2.619 6.42
2017 21.10 - 9.18 4.17 0.454 0.208 0.106
Cr 2008 551.96 16.70 42.73 37.13 0.888 158.542 11.613 70.3
2017 241.25 47.80 88.41 24.03 0.271 8.231 2.452
Hg 2008 0.99 - 0.08 0.12 1.447 16.191 3.144 0.181
2017 0.89 - 0.06 0.09 1.595 29.723 4.576