V tleh je ugotovil od 1,8 do 885 mg Hg/kg, štirje vzorci rečnih sedimentov kažejo podobno vsebnost kot tla, vzorca vode pa sta vsebovala 0,35 in 3,1 ug Hg/l. Prostorsko razporeditev koncentracij Hg v tleh na ozemlju velikem 8 x 14 km z Idrijo v sredini je raziskoval Hess (1993).
In soil he found from 1.8 to 885 mg Hg/kg. Analyzed were also 4 river sediment samples that contained comparable mercury as in soils, whereas the water samples contained 0.35 and 3.1 mg Hg/l.Spatial distribution of mercury in soil on an 8 x 14 km area with Idrija in the center was studied by Hess (1993).