Fig. 7From: Chemical surveillance in freshwaters: small sample sizes underestimate true pollutant loads and fail to detect environmental quality standard exceedancesSample size simulations for the weekly composite samples of DEHP in 2007, 2008, 2010 and 2016. For each year, the distribution of the 100,000 randomly sampled and calculated sub-sample means of DEHP per chosen sub-sample size is shown as boxplotsBack to article page