Routine well care

Annual well water testing: a practical checklist

A clear glass of water is not a test result. Build an annual baseline, then add tests when local conditions or changes around the well justify them.

Reviewed 2026-09-052 primary sources

Rural Home Compass editorial desk

Conceptual illustrationAnnual testing is a record-keeping decision as well as a sample: follow the assigned laboratory instructions and keep the report with the property records.

Start here

The short version

The agency annual baseline covers total coliform bacteria, nitrate, pH, and total dissolved solids; discuss additional analyses with the laboratory.
Use a state-certified drinking-water laboratory.
Test again after flooding, well work, nearby land disturbance, or a change in taste, odor, or color.

The annual baseline

EPA and CDC describe an annual baseline. Our planner also includes E. coli and nitrite as related discussion items, not as a claim that these are universal annual requirements. Keep reports comparable by retaining their analytes, units, sample locations and dates.

Total coliform bacteria
Nitrate
pH
Total dissolved solids

When the baseline is not enough

The useful panel depends on geology, nearby activity, plumbing, and household vulnerability. A local health department or certified laboratory can help select additional analytes.

Add VOC testing for a credible fuel, solvent, landfill, or dry-cleaning concern.
Consider pesticides and nitrate where intensive agriculture is nearby.
Add lead and copper when plumbing or service-line materials are a concern.
Treat changes in odor, taste, color, or turbidity as reasons to test—not as diagnoses.

Make the result actionable

Record the sample location, date, laboratory, analytes, units, and any benchmark shown. If a contaminant exceeds a health benchmark, contact the local health department and confirm the result before choosing treatment.

A checklist you can use

From “test the well” to a clear next step.

The planner starts with these shared records. It includes E. coli and nitrite as discussion items alongside the agency baseline; it does not claim that every listed analysis is a universal annual requirement.

Coliform bacteria and E. coli

total coliform bacteria · E. coli

Understand this record →

Nitrate and nitrite

nitrate · nitrite

Understand this record →

pH and total dissolved solids

pH · total dissolved solids

What changed since the last report?

A calendar reminder is only one starting point. Choose an example to see how the same rules respond.

Compare an exampleOdor or bad taste Compare an exampleStaining Compare an exampleNearby agriculture Safety-first pathFlood or well work

These examples are not an exhaustive screening questionnaire. For illness, fuel-like odor or other urgent concerns, use the full safety-first tool and local guidance rather than a routine shopping comparison.

Prepare the conversation

Your testing checklist

Optional checkmarks are for this page only; they are not a saved maintenance record or a water-safety assessment.

Find the latest reportRecord its date, laboratory and sample location. If a date is missing, leave it unknown.Describe the decisionTell the lab about the question you need answered and any relevant changes.Confirm the panel and instructionsAsk which analyses, containers, handling and delivery arrangements apply.Keep the result with the property recordsSave the report and any follow-up instructions from the laboratory or local authority.

Planning sequence by the editorial desk. Agency guidance: CDC well-water testing and EPA private wells, checked September 6, 2026 local time. Follow the laboratory's sampling instructions; this checklist is not a collection protocol.

Keep the next step connected

Build the panel. Then compare the coverage.

Start with your actual context. The tool will show the tests selected and any safety stop.

Open my starting panel →

Build my starting test panel →

Sources and review record

Facts were checked against the sources below on 2026-09-05. Local rules and current agency instructions override this national guide.

US EPA: Protect Your Home's WaterReviewed 2026-09-05
CDC: Guidelines for Testing Well WaterReviewed 2026-09-05