Abstract: A Residential In-well Internal Water Aerator for reducing/eliminating iron, Hydrogen sulfide, and radon gas is a device that hangs within the well casing. Its support is achieved by the well cap. It is capable of degassing hydrogen sulfide and radon gas and precipitation of the iron to become a solid and attaching its self to the interior walls and drip screens of the Residential In-well Internal Water Aerator within the well, thus reducing/eliminating the stained fixtures, bad smell and the risk of radon gas from within the residence.