How often should a well be serviced?

Test and visually inspect at least annually. Treatment equipment follows its own maintenance schedule, and many owners add a professional inspection every few years — sooner for older wells or after problems.

Do I need to maintain the well if the water seems fine?

Yes. Many contaminants are invisible and odorless, and wellhead problems develop gradually. Annual testing and a quick inspection protect you before issues become obvious.

Well Maintenance

Annual Well Maintenance: A Homeowner’s Checklist

A short yearly routine — test, inspect the wellhead, keep records — prevents most well surprises. Build a printable schedule with our planner.

By Know Your Well Water Editorial TeamReviewed October 28, 20263 min read

Quick Answer

At least once a year, test your well for total coliform bacteria and nitrate (plus pH and anything of local concern), visually inspect the well cap and casing, make sure the ground slopes away from the wellhead, and keep hazardous materials away from it. Keep your test results and service records. These few habits catch most problems early.

The annual checklist

Once a year

1Test for total coliform bacteria and nitrate at a certified lab; add local concerns (e.g., arsenic) as recommended.
2Inspect the well cap: intact, tight, and vents screened.
3Check the casing: at least about 12 inches above grade (per local code) and undamaged.
4Confirm the ground slopes away from the wellhead so surface water drains off.
5Keep fertilizers, fuel, and chemicals well away from the well.
6File your results and any service notes with your well records.

Why the wellhead matters

Most bacterial contamination enters through a compromised wellhead — a loose cap, short casing, or pooling water. A two-minute visual check is one of the highest-value things you can do.

Beyond the yearly basics

Service any treatment equipment (filters, softener, UV) on the manufacturer’s schedule.
Watch for changes in taste, odor, color, or pressure and test when they occur.
Consider a periodic professional inspection and flow test, especially for older wells.
Know where your well records and system components are, in case of a problem.

Make it printable

Use our Well Maintenance Planner to generate a checklist tailored to your situation (treatment equipment, flood risk, older well) that you can print and keep by the equipment.

Frequently asked questions

How often should a well be serviced?: Test and visually inspect at least annually. Treatment equipment follows its own maintenance schedule, and many owners add a professional inspection every few years — sooner for older wells or after problems.
Do I need to maintain the well if the water seems fine?: Yes. Many contaminants are invisible and odorless, and wellhead problems develop gradually. Annual testing and a quick inspection protect you before issues become obvious.

Sources & references

Private Ground Water Wells — CDC, accessed October 28, 2026
Protect Your Home’s Water: Private Wells — US EPA, accessed October 28, 2026

This guide is documentary research and general information, not a laboratory analysis or professional assessment of your specific well. See our disclaimer.