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Table 3 Trace metal and glyphosate content in drinking water samples

From: Drinking well water and occupational exposure to Herbicides is associated with chronic kidney disease, in Padavi-Sripura, Sri Lanka

  Abandoned wells Serving wells U Z# P value Surface water Ro water Colombo well Colombo tap
Mean Median Mean Median
Al 2.2 1.0 2.9 2.2 117.5 −0.916 0.3596 3.5 <0.1 6.7 71.6
Sb 3.2 0.9 4.5 2.9 127.0 −0.587 0.5570 3.4 0.1 0.3 0.5
As 0.8 0.4 0.3 0.3 104.5 −1.381 0.1674 0.2 0.2 <0.5 <0.1
Cd 0.04 0.0 0.04 0.0 138.0 −0.247 0.8051 0.1 0.1 0.1 0.1
Cr 1.0 0.6 0.5 0.0 103.0 −1.495 0.1348 0.3 0.4 <0.1 <0.1
Co 0.07 0.1 0.2 0.1 118.0 −0.968 0.3329 0.1 <0.1 0.1 0.2
Cu 1.4 1.2 1.9 1.0 107.5 −1.264 0.2063 0.4 3.5 0.3 0.4
Fe 90.5 76.6 45.2 40 60.0 −2.898 0.0038** 20.0 1.5 17.4 26.1
Pb 0.5 0.1 0.2 0.1 124.0 −0.791 0.4287 0.1 0.2 0.1 0.1
Mn 2.8 1.1 2.0 0.3 98.5 −1.573 0.1156 0.8 0.4 5.5 6.4
Mo 1.5 1.4 1.1 0.8 97.5 −1.609 0.1077 0.3 1.0 0.3 0.4
Ni 0.8 0.7 3.1 0.6 140.0 −0.139 0.8897 0.3 0.8 0.1 0.2
Se 0.7 0.7 0.3 0.2 65.5 −2.731 0.0063** 0.4 0.3 <0.1 <0.1
Ag 0.01 0.0 0.02 0.0 133.5 −0.736 0.4615 <0.1 0.1 <0.1 0.1
Tl 0.1 0.1 0.05 0.0 129.0 −0.582 0.5603 0.1 0.1 <0.1 <0.1
Sn 0.3 0.3 0.3 0.3 143.0 −0.038 0.9696 0.3 0.2 0.3 0.3
Ti 0.8 0.8 0.6 0.7 85.5 −2.047 0.0406* 0.2 0.3 0.3 0.3
V 14.4 10.5 17.4 6.3 84.5 −2.053 0.0400* 1.4 0.8 0.3 0.3
Zn 4.3 2.3 7.7 3.4 115.0 −1.001 0.3168 6.8 6.1 0.8 0.7
Gly+ 3.5 3.2 0.7 0.6 15.0 −4.456 0.0000** 0.05 ND ND ND
  1. *P < 0.05, **P < 0.01, # two sample Wilcoxan rank-sum (Mann–Whitney) test, + Glyphosate.
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