Long term contamination (2009-2022) dataset of DDTs and PCBs in zooplankton of Lake Maggiore (Italy)

<pre>We reported a 13-year (2009-2022) dataset of legacy POPs (DDT_tot and sumPCB₁₄, from 2016 also isomers and congeners concentrations are reported) in the zooplankton of Lake Maggiore (≥450 µm size fraction). The data were collected seasonally in the framework of a research program, funded by CIPAIS (Commissione Italiana per la Protezione delle Acque Italo-Svizzere), aimed at monitoring the presence of pollutants in the lake biota, particularly in the zooplankton size fraction directly linked to fish consumption. The dataset provides also the Standing Stock Density (SSD) and Standing Stock Biomass (SSB) of pelagic zooplankton organisms belonging to the size fraction ≥450 µm. </pre>