Well water testing labs in Ohio

Last verified October 28, 2026 against the official state list (official list, copied 2026-10-28).

These are labs on Ohio's official certified drinking water list (Ohio EPA combined lab list, October 2026). Many of them test samples for public water systems; call before sampling to confirm a lab accepts private well samples and to ask about prices and drop-off hours.

Certified labs (primary and secondary contaminants)

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Notes on this list

• Copied from the official Ohio list linked below. We left out labs that are only government or utility labs where the list marks them that way.
• A lab can be certified for some tests and not others. Ask which tests are certified for drinking water before you order.
• Prices are not on the state list. Ask the lab.

Recommended tests

• Every year, test for total coliform bacteria, nitrate, total dissolved solids and pH, as EPA recommends for private wells. Source
• Nitrate: USGS finds higher nitrate in shallow groundwater under farmland. Parts of Ohio are intensively farmed, so test nitrate every year, and before using the water for infant formula. Source
• Arsenic: USGS maps show naturally occurring arsenic in groundwater in parts of Ohio and its region. Test at least once, then as your lab or health department advises. 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

• Ohio Environmental Protection Agency (lab certification): Official program page Source

Sources

• Ohio Environmental Protection Agency: drinking water laboratory certification program
• Ohio official list of certified drinking water labs
• EPA: State certification programs and lists of certified drinking water labs (PDF, Aug 2025)
• EPA: Protect your home's water (private wells)

Other states

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Also read: what your results mean · PFAS testing · well water guides · free checklist.