Why does only one toilet fill up with yellow water when flushed?

If only one toilet fills up with yellow water when flushed, it may indicate a localized issue, such as a problem with the toilet itself or the Plumbing leading to it. The yellow color could result from mineral buildup, rust, or stagnant water in the toilet's tank or bowl. It's also possible that a nearby rusted pipe is affecting water quality specifically for that toilet. Examining the toilet's components and the water supply line can help identify the cause.