If your home in Troy runs on a private well, the water comes from groundwater, and no public agency tests it for you. Rural wells across Lincoln County are not regulated or sampled under the Safe Drinking Water Act, so the testing schedule falls to the homeowner. Bacteria is one of the most useful first checks because it shows whether surface material is getting into the well.
What the test looks for
Labs usually report two groups. Total coliform bacteria are a broad indicator group. They are common in soil and surface water, so finding them tells you the well may be open to outside material, though not necessarily what kind. E. coli is more specific. It lives in the intestines of warm-blooded animals, so a positive result points toward a recent path from surface sources such as animal waste, a septic leak, or runoff. Neither result is a diagnosis of anything. Both are signals that the well needs investigation.
How bacteria can reach a Troy well
Troy sits over limestone and dolomite bedrock, and river alluvium in places, and both can carry water quickly through cracks and gravel. Common openings near the home include:
- A cracked or unsealed well casing at or near the surface
- A loose well cap, or a vent without an intact insect screen
- Surface water pooling around the wellhead or pump house
- A pitless adapter or electrical conduit that has lost its seal
- Flood water, heavy rain runoff, or debris piled near the well
- Septic components or livestock areas uphill or nearby
Collecting a sample the right way
Use a bottle from a certified lab and follow its instructions exactly. Most labs ask you to:
- Wash your hands and avoid touching the inside of the bottle or cap.
- Remove any aerator or screen from a cold kitchen tap, then clean the faucet outlet as the lab directs.
- Let the water run as instructed before filling, so you are not testing water that has been sitting in the pipes.
- Fill to the marked line without rinsing the bottle, and seal it right away.
- Keep the sample cool and get it to the lab within the window the lab specifies.
Sample before any filter, softener, or other treatment unit if you want to know what the source is delivering. If you also want to check a treatment unit, collect a second sample after it and label both clearly.
When to test
Once a year is a reasonable routine for most owners in Troy. Test sooner if you notice cloudiness, a change in taste or odor, a flooded well area, or recent work on the pump, pressure tank, or lines. Test again after any repair, because a repair can introduce contamination.
Reading the results
A clear report with no bacteria detected is what you want. If the report shows a positive result, the next steps depend on which group was found:
- Total coliform present, E. coli absent: inspect the wellhead, cap, casing, and surface drainage, then retest after fixes.
- E. coli present: treat it as urgent. Use bottled or otherwise known-safe water for drinking and cooking until a retest comes back clean, and call a licensed well contractor to find and correct the opening.
Many owners also disinfect the well after a positive result. That is a procedure best handled by a qualified well professional, because the approach depends on how the well is built. Do not guess at it from a general guide.
What a bacteria test does not cover
A bacteria test is a snapshot of one sample on one day. It does not check for chemicals, metals, or minerals. In Troy, the common additional concerns for private wells include iron and manganese, hydrogen sulfide, nitrates in shallow or farm-area wells, and radium from deep bedrock, which many owners never test for. Ask the lab for a panel that matches your situation rather than assuming one bacteria report answers everything.
Keep a simple record
Write down the date, the lab, the results, any repairs, and any changes you notice in the water. A running record helps you spot patterns, such as results turning positive after heavy rain, and gives a contractor useful history.
Next step
Start with a sample from your kitchen cold tap this season, read the report against the list above, and fix any surface opening you find before you decide on treatment. Testing first and equipment second keeps decisions grounded in what the water actually shows.