15 named for arsenic itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Oklahoma but on its list.
USGS estimate for Oklahoma.
How many labs test for arsenic in Oklahoma
15 labs on Oklahoma's official drinking-water lab list are certified to test for arsenic. All 15 are named for arsenic on the list. 14 of them are marked as taking samples from the public. They are listed first. 8 are located outside Oklahoma.
The list is published by the Oklahoma Department of Environmental Quality (ODEQ) - Laboratory Accreditation Program. List version on file: Live database, searched 2026-11-02. Fetched 2026-11-02 (UTC).
Oklahoma labs certified for arsenic
Marked as taking public samples (14)
| Lab | Location | Arsenic certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| Accurate Environmental Labs - Stillwater | Stillwater, OK | Named on the official list | Public samples: yes (per state) | Not on the list |
| Accurate Environmental Labs - Tulsa | Tulsa, OK | Named on the official list | Public samples: yes (per state) | Not on the list |
| City of Tulsa - Instrumentation | Tulsa, OK | Named on the official list | Public samples: yes (per state) | Not on the list |
| EMSL Analytical, Inc. - Minnesota | New Hope, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Environmental Resource Technologies | Ada, OK | Named on the official list | Public samples: yes (per state) | Not on the list |
| Eurofins South Bend | South Bend, IN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Microbac Laboratories, Inc. - Marietta | Marietta, OH | Named on the official list | Public samples: yes (per state) | Not on the list |
| OK DEQ State Env. Lab (EPA Drinking Water Certified) Principal State Laboratory | Oklahoma City, OK | Named on the official list | Public samples: yes (per state) | Not on the list |
| Pace Analytical Services - Minneapolis | Minneapolis, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Pace Analytical Services - National Center for Testing and Innovation | Mt. Juliet, TN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Pace Analytical Services - Ormond Beach, FL | Ormond Beach, FL | Named on the official list | Public samples: yes (per state) | Not on the list |
| SPL, Inc - Kilgore | Kilgore, TX | Named on the official list | Public samples: yes (per state) | Not on the list |
| Tulsa City-County Health Department | Tulsa, OK | Named on the official list | Public samples: yes (per state) | Not on the list |
| Weck Laboratories, Inc. | Industry, CA | Named on the official list | Public samples: yes (per state) | Not on the list |
Other labs on the list (1)
| Lab | Location | Arsenic certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| City of OKC WQ Laboratory - Hefner WTP | Oklahoma City, OK | Named on the official list | Not marked as taking public samples Looks like a utility or municipal lab, judging by the name (our label, not the state list) | Not on the list |
How the Oklahoma list marks public samples (whole list). Yes/no from ODEQ's 'Commercial Sample' column. ODEQ: "To view laboratories accepting private samples, see the 'Commercial Sample' column". ODEQ does not say whether 'private samples' means household wells, so call first.
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 Oklahoma
Arsenic is invisible, tasteless and mostly natural, and it comes in two forms that respond very differently to treatment. Read our arsenic explainer.
Prices at Oklahoma DEQ State Environmental Laboratory Services, Lab Services Fee Schedule FY27, effective July 1, 2026 through June 30, 2027 (card payments add a 2.25% merchant fee and a $2 portal fee), as published when checked on 2 Nov 2026. Private certified labs set their own prices.
| Test | Price |
|---|---|
| Arsenic | $33 [1] |
USGS estimates that the most private-well users with arsenic above 10 µg/L, EPA's limit for public water, live in Texas County, Beaver County and Lincoln County (about 335 people in Texas 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. [2]
Show the numbers
| Item | Value | Note |
|---|---|---|
| Texas County | 335 people (2010 base year) | |
| Beaver County | 285 people (2010 base year) | |
| Lincoln County | 264 people (2010 base year) | |
| Pottawatomie County | 238 people (2010 base year) | |
| Grady County | 225 people (2010 base year) | |
| Oklahoma County | 213 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 356,860 people in Oklahoma used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [3] 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: Oklahoma.
Other tests in Oklahoma
- Oklahoma Department of Environmental Quality, State Environmental Laboratory Services, Lab Services Fee Schedule FY27 (effective Jul 1, 2026)
- 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)
- ODEQ Lab Facility Search - laboratories accredited by the DEQ Laboratory Accreditation Program (Matrix: Drinking Water) (official list)
ODEQ Lab Facility Search - laboratories accredited by the DEQ Laboratory Accreditation Program (Matrix: Drinking Water).
Official source