If your home is on a private well, the supply is not regulated the way a municipal system is, and monitoring and treatment are the homeowner's responsibility. Where that is the situation, we handle the profile in one system.
There's no public plant report for a well, so we work from what is known about wells near you and the symptoms you describe (staining, smell, past bacteria tests). It's area-based and probabilistic, and we're honest about that. If anything about the install turns out different on the day, you approve any price change before work starts.
One watch-out we'll always flag: if you have a pool on a separate well line, we keep it off the system. Tying it in burns through the media fast. Keeping it separate is what makes your system last.