A faucet assembly including a base defining a water delivery passageway, a valve member received in the base and movable between a closed position wherein flow through the water delivery passageway is blocked and an opened position wherein flow through the water delivery passageway is permitted, a magnet secured to the valve member such that, when the valve member is rotated to the opened position, the magnet is aligned with a sensor bore of the base, and when the valve member is rotated to the closed position, the magnet is unaligned with the sensor bore, a metal rod positioned in the sensor bore, and a Hall effect sensor positioned below the base in alignment with the sensor bore and adapted to switch on when the magnet is aligned with the sensor bore and switch off when the magnet is unaligned with the sensor bore.