0 named for arsenic 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 arsenic in Ohio
15 labs on Ohio's official drinking-water lab list are certified to test for arsenic. Of these, 15 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 arsenic
| Lab | Location | Arsenic certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| Alliance Technical Group, LLC-Akron (formerly Summit Env. Tech.) | Cuyahoga Falls, OH | Certified for a group that includes arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| ALS Environmental - Cincinnati | Cincinnati, OH | Certified for a group that includes arsenic: 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 arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| Biosolutions, LLC | Chagrin Falls, OH | Certified for a group that includes arsenic: 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 arsenic: 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 arsenic: 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 arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| Eurofins Cleveland | Barberton, OH | Certified for a group that includes arsenic: 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 arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| Jones & Henry Laboratories | Northwood, OH | Certified for a group that includes arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| MASI Laboratory | Plain City, OH | Certified for a group that includes arsenic: 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 arsenic: 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 arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| Ream & Haager Laboratories, Inc. | Dover, OH | Certified for a group that includes arsenic: confirm with the lab | Public samples: ask the lab | Not on the list |
| Aqua Pennsylvania, Inc. – Bryn Mawr | Bryn Mawr, PA | Certified for a group that includes arsenic: 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 arsenic in Ohio
Arsenic is invisible, tasteless and mostly natural, and it comes in two forms that respond very differently to treatment. Read our arsenic explainer.
USGS estimates that the most private-well users with arsenic above 10 µg/L, EPA's limit for public water, live in Wayne County, Licking County and Medina County (about 22,522 people in Wayne County, 2010 base year). USGS describes this kind of estimate as useful "for broad screening of the population at risk", so it says nothing certain about any one well. [1]
Show the numbers
| Item | Value | Note |
|---|---|---|
| Wayne County | 22,522 people (2010 base year) | |
| Licking County | 10,054 people (2010 base year) | |
| Medina County | 9,736 people (2010 base year) | |
| Summit County | 9,197 people (2010 base year) | |
| Fairfield County | 8,809 people (2010 base year) | |
| Trumbull County | 8,323 people (2010 base year) |
USGS model estimate for broad screening, not a measurement of any well. Only a test tells you about your own well. Source: USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017), accessed 2026-11-01.
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
- USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- Ohio EPA - Laboratories Certified/Accepted to Perform Analyses on Public Drinking Water (official list)
Ohio EPA - Laboratories Certified/Accepted to Perform Analyses on Public Drinking Water.
Official source