Well water testing in Oklahoma

Links checked October 28, 2026. Source: the EPA directory of state lab certification programs.

Oklahoma certifies drinking water labs through the Oklahoma Department of Environmental Quality. We have not copied that list here yet. The official list is a searchable database or map, so we link to it instead of copying it. The steps below show how to use it, what to test for, and where to get help.

Official list of certified labs in Oklahoma

Oklahoma Department of Environmental Quality (lab certification) keeps the official list. Format: OK DW laboratory list (search state: OK, search matrices: DW).

Open the official list Certification program

Free or low-cost testing: some county health departments and extension offices run free or subsidized well tests, often after floods. We have not confirmed a statewide program here, so check with your county health department. EPA private well guidance

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Flooding near you?

EPA says to test a private well for bacteria after a flood before drinking the water again. See current flood alerts, Flood Watch and our flood season testing guide. EPA: your well after a flood

Notes on this list

The official list is a searchable database or map, so we link to it instead of copying it.
Look for labs certified for drinking water (not only wastewater) and call to confirm they accept samples from private wells.
We do not list labs or prices for this state yet, so we do not guess. Use the official list linked here.

Recommended tests

Every year, test for total coliform bacteria, nitrate, total dissolved solids and pH, as EPA recommends for private wells. Source
PFAS: test if you live near an airport, military base, landfill, or industrial or firefighting-foam site. EPA explains private well PFAS testing. Source
After flooding, test for bacteria before drinking the water again, as EPA advises. Source

State contacts

Oklahoma Department of Environmental Quality (lab certification): Official program page Source

Questions

Where can I get my well water tested in Oklahoma?

Use the official list of certified drinking water labs from the Oklahoma Department of Environmental Quality, linked on this page. EPA says to use a state-certified lab. Your county or local health department can also tell you about local testing options, which sometimes cost less.

What should I test my Oklahoma well for?

EPA recommends a yearly test for total coliform bacteria, nitrate, total dissolved solids and pH. This page lists extra tests that matter in parts of the state, with sources.

Sources

Other states