You have done your research. You know the neighborhood. You know the school ratings, the commute time, the HOA rules, and roughly what the property taxes run. You have negotiated, inspected, and closed.
Here is what almost nobody tells you to check before you unpack: the water.
Not because something is necessarily wrong. But because moving is the natural moment to find out what you are working with — before you set up the coffee maker, before the kids start drinking from the tap, before you discover that the previous owners' water was hard enough to leave scale on the inside of the dishwasher they just hauled away.
Getting a baseline water test when you move in is the equivalent of a home energy audit. You do it once, you know what you are dealing with, and you make decisions with real information rather than assumptions.
City Water vs. Well Water — Different Starting Points
The path forward depends on your water source.
If you are on municipal water: A utility is treating and testing your water, and you have some regulatory protection. That does not mean the water is ideal or that it has not picked up something in transit. Your utility's annual Consumer Confidence Report tells you what they detected and whether anything exceeded federal limits. The EWG Tap Water Database tells you more — including how detected levels compare to health-based guidelines, not just legal ones. Search your zip code or your utility name.
The other variable for city water is your home's plumbing. The utility treats water at the plant, but it travels through potentially decades of pipes before it reaches your faucet. Homes built before 1986, when lead was banned in plumbing, may have lead solder in their pipes. Fixtures purchased before 1997 can contain up to 8 percent lead. An in-home water test tells you what is actually coming out of your tap — which can differ from what the utility reports, because the utility tests before the water enters your building.
If you are on a private well: There is no utility monitoring your water. No regulatory protection. No annual report. What is in your well is entirely your responsibility to know, and the only way to know it is to test it.
If you are purchasing a home with a well, test the water before closing — not after. Some lenders require it, particularly for FHA, VA, and USDA loans. All buyers should do it regardless. The seller's representation that the water is fine is not a water test.
At minimum, test for total coliform bacteria, nitrates, TDS, and pH. In East Tennessee, also test for iron, hardness, and sulfur — all common issues in the regional geology. If the property is near farmland, add nitrates as a priority. If it is in an area where sewage biosolids have been applied historically, consider PFAS testing.
If the Home Has an Existing Treatment System
A previous owner who cared about water quality is an asset — but only if the system has been maintained.
Water softeners: Check when salt was last added and when the system was last serviced. Most softeners need annual professional service and regular salt. A neglected softener is not softening your water. Ask the seller for service records. If there are none, have the system inspected before you rely on it.
RO systems: Under-sink RO systems need pre-filters replaced every 6-12 months and the membrane every 2-5 years. If there is no record of maintenance, assume the filters are due and have the system serviced before drinking from it. A degraded RO membrane may not be removing what it is supposed to remove.
UV sterilization: UV bulbs need replacement annually, regardless of whether the system looks operational. An expired UV bulb does not disinfect. If the home has a UV system for well water and there is no recent bulb replacement on record, replace it immediately.
Whole-house carbon filters: Carbon media has a finite capacity. A filter that has not been replaced on schedule is not filtering. Check the last replacement date and replace if unknown.
Any treatment equipment without service records should be inspected by a water treatment professional before you trust it.
If the Home Has No Treatment System
This is actually the cleaner starting point: you know exactly where you stand.
Test the water, understand what you are working with, and make a decision based on the results. The test takes 20 minutes. The results tell you what, if anything, the water needs.
Some homes genuinely have good water that needs nothing. Others have hard water, chlorine or chloramine concerns, or well water issues that benefit from treatment. You will not know until you test.
New Construction — New Pipes, Old Source Water
Here is a counterintuitive one: new construction does not mean clean water.
The pipes are new. The fixtures are new. But the water coming through those pipes is the same source water that feeds every other home in the area — the same aquifer, the same municipal supply, the same geology. New pipes do not change what is dissolved in the water or how hard it is.
New construction in the Tri-Cities area is particularly common in areas like Gray, Jonesborough, and parts of Kingsport and Johnson City's suburban growth corridors. If you are moving into a newly built home in any of these areas, the water profile is consistent with the surrounding region — and in most of these areas, that means moderately hard water at minimum.
The Real Estate Agent Connection
If you are working with a real estate agent for your move, ask whether they have a preferred water testing partner. A growing number of local agents work with MVP Water to provide complimentary water testing for their clients as part of the buying process. It is a straightforward way to know what you are buying into — and for the agent, it is a genuine value-add that costs them nothing.
If you are an agent reading this and you are not already offering something like this, it is worth a conversation.
Starting the Right Way
Moving in is the ideal moment to get a water test — before you have made any decisions about filters, before you have discovered problems the hard way, and while the question is still entirely open.
Mountain View Pure Water and Air offers free in-home water testing throughout the Tri-Cities and the surrounding region — whether you are on city water or well water, in a new build or a historic home. We test in front of you, explain everything, and give you an honest read on what makes sense for your specific water and your family.
Schedule at mvpwater.net or call 423-218-9361.
