2 named for nitrate itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Ohio but on its list.
USGS estimate for Ohio.
How many labs test for nitrate in Ohio
22 labs on Ohio's official drinking-water lab list are certified to test for nitrate. Of these, 2 are named for nitrate itself and 20 hold a group certification that includes it. The Ohio list does not say which labs take samples from homeowners, so call a lab before you send one. 1 is located outside Ohio.
The list is published by the Ohio EPA - Division of Drinking and Ground Waters. List version on file: November 2026. Fetched 2026-11-15 (UTC).
Ohio labs certified for nitrate
| Lab | Location | Nitrate certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| Alliance Technical Group, LLC-Akron (formerly Summit Env. Tech.) | Cuyahoga Falls, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| American Analytical Laboratories, Inc. | Akron, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Biosolutions, LLC | Chagrin Falls, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Canton Water Laboratory | Canton, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Cardinal Environmental Lab, LLC | Youngstown, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Coshocton Environmental Testing, LLC | Coshocton, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Dayton Central Water Quality Laboratory | Dayton, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Eurofins Cleveland | Barberton, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Eurofins DW and WW Central - Marion (formerly Alloway Marion) | Marion, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Jones & Henry Laboratories | Northwood, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| MASI Laboratory | Plain City, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Microbac Laboratories, Inc. – Marietta Division | Marietta, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| NEORSD Analytical Services | Cuyahoga Heights, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Pace Analytical Services, LLC - Dayton | Englewood, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| Q Laboratories | Cincinnati, OH | Named on the official list | Public samples: ask the lab | Not on the list |
| Ream & Haager Laboratories, Inc. | Dover, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab | Not on the list |
| SafeSource Water Analytics LLC | McConnelsville, OH | Named on the official list | Public samples: ask the lab | Not on the list |
| Aqua Pennsylvania, Inc. – Bryn Mawr | Bryn Mawr, PA | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Geauga County Department of Water Resources | Chardon, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Greene County Sanitary Engineering Laboratory | Beavercreek, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Portage County Water Resources | Ravenna, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
| Sebring Water Department Laboratory | Beloit, OH | Certified for a group that includes nitrate: confirm with the lab | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
How the Ohio list marks public samples (whole list). Not stated. The list covers public drinking-water certification.
Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.
Why test for nitrate in Ohio
Nitrate has no taste or smell, and a lab report can state the same water in two units that differ by a factor of 4.43. Read our nitrate explainer.
EPA advises private-well owners to test every year for total coliform bacteria, nitrates, total dissolved solids and pH. [1]
About 1,861,023 people in Ohio used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [2] Federal limits are written for public water systems, not private wells, so testing is up to the owner.
For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: Ohio.
Other tests in Ohio
Ohio EPA - Laboratories Certified/Accepted to Perform Analyses on Public Drinking Water.
Official source