The answer to 'sump pump rusty water' is that rusty water coming from a sump pump is a common issue that can have several potential causes. This is usually a sign of corrosion or mineral buildup in the pump or the surrounding plumbing.
Some common causes include old age, poor water quality, or a damaged sump pump. The rusty water may also indicate that the pump is nearing the end of its lifespan and needs to be replaced. In some cases, the issue can be resolved with a simple cleaning or maintenance, but more serious problems may require professional repair or replacement.