What is the electron pair geometry for a water molecule, H_2O?

Around each oxygen atom there are 2 lone pairs, and 2 bonding pairs of electrons to form the $O - H$ bonds. $\angle H - O - H$ is compressed from the ideal tetrahedral angle of $109.5$ ""^@ to approx. $104.5$ ""^@ because the lone pairs are larger and more diffuse than a localized bonding pair, and therefore more likely to influence structure.