Does the government test private well water for me?

No. The EPA rules that protect public water systems do not apply to private wells. Testing, treatment, and monitoring are the owner’s responsibility.

Is well water testing the same as the test required for a home sale?

No. A sale-related test is usually a one-time panel a lender or county requires before closing. This is the ongoing annual schedule for as long as you own and use the well.

My water tastes and looks fine — do I still need to test it?

Yes. Bacteria, nitrates, and most chemical contaminants have no taste, color, or smell. A clean-looking glass of water tells you nothing about coliform or nitrate levels.

How often should you test and maintain a private well?

Test your well water at least once a year for total coliform bacteria, nitrates, total dissolved solids, and pH, per the CDC — and get the well itself checked annually too. Nobody does this for you: EPA rules that protect public water systems do not apply to a private well, so testing and upkeep are entirely on the owner.

Checked against CDC and EPA private-well guidance, 2026-09-13. General information, not a substitute for a certified lab's results.

The annual test, at minimum

. Use a state-certified lab — the results from a home test strip aren't reliable enough to act on for bacteria or nitrates.

When to test outside the annual schedule

The CDC lists several triggers for an unscheduled test, beyond the yearly one:

If someone pregnant or a child joins the household

The CDC calls out two situations that warrant additional testing right away: , or . Infants and pregnant women are more vulnerable to nitrate contamination than the general population.

Maintaining the well itself, not just the water

Inspect the physical components. Periodically check for a , a , or .
Keep the seal intact. , and never .
Grade the ground around it. , so rain and snowmelt don't pool at the wellhead.
Keep contaminants away. , and never dispose of chemicals down a septic system near it.
Keep a record. — the same running record that makes a future water test easier to interpret.

Why this is entirely on you

That's the whole reason an annual test matters more here than for a home on city water — no one else is checking it.

If you also have a septic system

A failing septic system is one of the contamination sources a well test is designed to catch. If you have both on the same property, see the septic maintenance schedule and the warning signs of failure.

Sources & last verified

. Checked 2026-09-13.
. Checked 2026-09-13.

Found something out of date? Email corrections@homecleared.com.

Common questions

Does the government test private well water for me?: No. The EPA rules that protect public water systems do not apply to private wells. Testing, treatment, and monitoring are the owner’s responsibility.
What if I just moved into a home with a well and don’t know the last test date?: Treat it as untested and get a full panel now: coliform bacteria, nitrates, total dissolved solids, and pH at minimum. Start the annual clock from that result.
Is well water testing the same as the test required for a home sale?: No. A sale-related test is usually a one-time panel a lender or county requires before closing. This is the ongoing annual schedule for as long as you own and use the well.
My water tastes and looks fine — do I still need to test it?: Yes. Bacteria, nitrates, and most chemical contaminants have no taste, color, or smell. A clean-looking glass of water tells you nothing about coliform or nitrate levels.