Quick take
Test first. For meaningful dissolved iron, oxidation plus filtration is usually more robust than relying on a basic sediment filter or softener alone.
Why orange stains form
Dissolved iron can oxidize after exposure to air and form orange-brown deposits on fixtures and laundry.
Dedicated iron treatment
Air-injection and catalytic media are common whole-house approaches for higher iron loads.
When a softener may help
A softener can sometimes remove modest dissolved iron while treating hardness, but excessive iron can foul resin.
Best commercial route
Testing can lead to Tap Score, while RKIN and SpringWell provide available whole-house iron treatment.