Open Access

Table 6.

Level of mercury contamination

Indicators Quarters
I II III IV
Number of samples with a maximum mercury content 44 21 21 28
of the total number of samples, % 8.80 4.20 4.20 5.60
Number of samples with a medium mercury content 273 268 251 243
of the total number of samples, % 54.60 53.60 50.20 48.60
Number of samples with a minimum mercury content 191 211 228 229
of the total number of samples, % 38.20 42.20 45.60 45.80
Mercury standard 0.005 0.005 0.005 0.005
Average mercury content 0.0002 0.0001 0.0002 0.0002
of the standard, % 4.00 2.00 4.00 4.00

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