Scores, PC1-PC2

  Finally the Scores are plotted. First of all, we can note that the "Porto Nuovo of Ostia" sample stays in the center of the distribution, so confirming its suitability as test matrix and the reliability of the obtained accuracy data.

  A lack of "aggregations" is evidenced; really both the sampling water columns and the points along each column are enough distribute on all of the chart plane. This can demonstrate that a continuous "dilution" of the pollutants occurred starting from the steelworks closing