A Private Well Water Testing Calendar
Set the routine annual well test, spring inspection, and event-triggered follow-up with a state-certified lab and your local health department.
Put a recurring reminder on the calendar for the spring walk-around and the annual laboratory test. A private well is not monitored by the public-water rules that apply to community systems, so the household has to arrange its own testing and interpret results with local help.
The CDC recommends annual testing for total coliform bacteria, nitrates, total dissolved solids, and pH, and using a state-certified laboratory. It also recommends a mechanical check each spring. This is a baseline: your health department can identify additional germs or chemicals that matter for your location, nearby land use, or a recent event.
A calendar with three kinds of reminders
| When | Household reminder | Record or contact |
|---|---|---|
| Every spring | Look safely for visible damage, loose or missing cap, standing water, erosion, or changes around the wellhead | Note observations; schedule a qualified contractor for mechanical concerns |
| At least once each year | Submit the routine sample for total coliform, nitrate, total dissolved solids, and pH | Certified lab, sample date, collection method, report and result date |
| When local conditions warrant | Ask about locally relevant chemicals or germs, such as arsenic, pesticides, fuel-related compounds, or other contaminants | Health or environmental department identifies analytes and lab requirements |
| After possible contamination or system work | Contact the health department after flooding, nearby contamination, a repair, or a change in smell/color/taste | Ask about use restrictions, alternate water, tests, and sampling time |
| When household needs change | Arrange additional testing when someone becomes pregnant or a child starts living in the home | Ask the health department and certified lab which tests and timing apply |
| After results arrive | Review any result that exceeds a lab or health-authority threshold or is difficult to interpret | Lab and health department explain the result and written next step |
This calendar intentionally separates the annual baseline from the local panel. The right test can depend on geology, nearby septic systems, agriculture, industry, fuel storage, floods, or a change in the well. Buying a broad test bundle without knowing the question can leave out the contaminant that matters or include tests that do not answer it.
Arrange the annual sample
Call the health department or environmental office and ask for the state’s list of certified laboratories. Before collecting, confirm whether the lab supplies a sterile bottle, which tap to use, whether a treatment device should be bypassed, and how quickly the sample must be returned. Follow its instructions rather than rinsing or filling the bottle in a way that could invalidate the sample.
Keep the lab’s report with the well’s service records. Record the exact analyte name, result, unit, test method if listed, and any laboratory interpretation. If a result is positive or unclear, contact the health department before choosing a filter, disinfectant, or alternate water plan. A result is meaningful only in the context of the analyte tested, sampling method, and applicable guidance.
The spring check is visual, not a safety test
A walk-around can help you spot issues worth a qualified inspection, but a clear-looking wellhead does not establish water safety. Do not open a well, enter a pit, touch damaged electrical equipment, or attempt repairs beyond your competence. Use a licensed or otherwise qualified well contractor for mechanical problems and ask about requirements in your jurisdiction.
Keep an eye out for cracked casing, a missing or loose cover, ponding water, erosion, damaged wiring, an unusual change in pump behavior, or nearby work that could affect the source. Take photos from a safe distance and note when you first saw the change. Call the local authority if anything suggests contamination or if the water changes in color, taste, or odor; do not taste it to test safety.
When to move the next test sooner
The CDC lists several reasons to test outside the normal annual reminder: notice of a local well-water problem, nearby flooding or land disturbance, repairs or replacement of part of the well system, a change in water’s color, taste, or smell, pregnancy, or a child moving into the home. Local health officials can recommend chemicals or germs to test for based on where you live.
Pregnancy or a child moving in is a reason to arrange testing, not evidence by itself that the well is contaminated. A flood, spill, changed water, or positive test raises a different question: whether to restrict use while the problem is assessed. Ask the health department what water may be used for and which alternate source is appropriate; do not wait for the next annual reminder when contamination is suspected.
If flooding affected the well, stop and get event-specific instructions. Do not treat the routine calendar as a recovery protocol. The private well after a flood guide covers safe coordination with local authorities, qualified contractors, and testing laboratories.
Private well calendar
Copy this into a paper planner or phone calendar and fill in the local details:
- Spring inspection reminder: month/date
____; who checks mechanical items____ - Routine lab due: month/date
____; certified lab____; phone____ - Routine analytes: total coliform
____; nitrate____; total dissolved solids____; pH____ - Local add-ons recommended by health department: ____
- Sample method and drop-off deadline: ____
- Result review date:
____; contact if result is unclear____ - Events that should trigger an early call: flood, nearby spill/site change, repair, appearance/odor change, new household circumstance, other local guidance: ____
- Last sample date and next due date: ____
A calendar makes testing easier to remember; it does not declare a well safe. Follow the lab and local authority’s recommendations for any follow-up, treatment, or return-to-use decision.
