He resumed his studies at Utrecht University, and in 1960 emigrated to the Canadian province of Alberta with his wife and two children.

[1] Although he was employed as a geophysicist at the Research Council of Alberta, he soon had to work as a groundwater consultant in Hydrogeology.

Hubbert's 1940 paper "The theory of ground-water motion",[2] Tóth solved the Laplace equation for a "unit basin" geometry.

"[1] His theory of regional groundwater flow is discussed in most hydrogeology textbooks, such as Fetter,[5] Hornberger et al.,[6] Deming,[7] and Freeze and Cherry's Groundwater,[8] the cover of which prominently featured his regional flow diagram.

[7] Among his more than a hundred publications of international influence based on his theory, several of his studies cover special fields, such as: underground storage of highly radioactive waste; formation and improvement of saline soils; hydrocarbon and uranium ore exploration; soil and rock mechanics; and formation of wetlands.