Well water question.

That's how I tell when our filter needs changing. If we get a slight smell when the water is turned on really high, I know it's time. Other than that, we never smell anything.
I wish ours was that simple! We have a "whole house" filter right after the tank, and ahead of the water softener, but unfortunately the smell is coming from someplace upstream of the filter. So either it's the well, or the pressure vessel/tank, or....