In this numerical treatment efforts were made to reveal the conical intersections (ci) between the two lower, 1 2 A′ and 2 2 A′ states – to be designated as (1,2) ci – and the (2,3) cis between the two upper, 2 2 A′ and 3 2 A′ states – of the {H 2 O} system. We found that the two lower states are coupled by cis located along the O–H–H and the H–O–H arrangements. No other arrangement was found to form (1,2) cis. As for the (2,3) cis, they are found to be C 2v cis located along the symmetry line that connects the center-of-mass of the two hydrogens and the oxygen.