According to the U.S. Geological Survey, Texas, Arizona, Nevada, Indiana, and Florida have some of the hardest water in the country, which can increase the likelihood of toilet rings. Hard water ...

These rings are most often caused by minerals in the water supply, especially in areas with hard water. This guide explains what causes toilet bowl rings, how to remove the stains depending on the ...

Seats and hardware: Some toilets recommended by CR don’t come with a seat, a wax ring ... each toilet to a specially built plumbing system that measures the volume and flow of water into ...