# Why does (atmospheric) pressure have an effect on solubility?

The Wikipedia article titled Solubility table states that

The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at 1 atmosphere pressure.

Why does pressure have an effect of on solubility?

It comes from a combination of Henry's law and Le Châtelier's principle. Henry's law is $$p=k_hc$$ where $p$ is the partial pressure of the gas, $k_h$ is the Henry's law constant and $c$ is the concentration of the gas (because liquids and solids are not affected as much as gases, if at all). This means that with a greater pressure comes a greater concentration, and with a lower pressure comes a lesser concentration, and vice versa