U.S. Region 9 Lab - Corvallis, OR

At a glance

What it is certified to test

7 of the 9 common well tests on the OR list (see which)

Price

no per-test price printed on the lab’s website when we read it (15 Nov 2026): ask for a quote

Turnaround

not stated on the state list or the lab’s website: ask when you order

Homeowner samples

no (state list)

Lab facts

Listed by

Oregon (Oregon Health Authority (OHA) - Oregon State Public Health Laboratory, Oregon Environmental Laboratory Accreditation Program (ORELAP))

Address

200 SW 35th St., Corvallis, OR 97321 · Open in Google Maps

Phone

(541) 754-4700

Website

www.epa.gov/aboutepa/epa-region-9-laboratory-contacts

Not on the state list: found and checked by us, 15 Nov 2026

Public / homeowner samples

Not marked as taking public samples

ORELAP's lab search does not mark this lab as accepting public samples (OHA: labs with that mark "can accept samples from anyone"); checked on the fetch date.

Certification record

Certificate ID

4178

Issued by

Oregon Health Authority (OHA) - Oregon State Public Health Laboratory, Oregon Environmental Laboratory Accreditation Program (ORELAP) (certification program)

Expiry on the list

8/31/2027 · expires in 289 days

List version

ORELAP laboratory search (ODIE): accredited for the Drinking Water matrix, version search as fetched 2026-11-15 (live database, no list date)

We fetched it

15 Nov 2026 (file SHA-256 a4b0407bc4d3…) · open the state file

Tests on the state list

• Named on the official list The state list names this analyte (or a column for it) for this lab.
• Group-level certification Certified for a parent group (e.g. 'Inorganics') that includes this analyte. Confirm the specific test with the lab.
• Partial group certification The list marks the group as 'Partial'. Confirm this analyte with the lab.
• Subcontracted The lab sends this analyte to another accredited lab (MDH 'X*').

ORELAP Fields of Accreditation, certificate 4178 - 005 (issued 9/10/2026, list as of 9/10/2026): 163 drinking-water analytes accredited.

Nearest labs that take homeowner samples

1 other certified lab that takes homeowner samples is within 25 miles of this lab. Distances are straight-line from the address on the state list (approx. = ZIP-code centre). “Takes homeowner samples” comes from a state list column or the lab’s own website, as named.

Price and turnaround as printed on each lab’s own website and checked by a second reader; – = not published or not read yet.

Around this lab: Benton County, OR

• Private wells: about 24,598 people, 28% of Benton County’s 87,572 residents (USGS, 2015); rank 11 of 36 counties in Oregon by people on wells.
• At house sale: Statewide (Domestic Well Testing Act) has a well_test rule (ORS 448.271; OAR 333-061-0305 to 0335). What it requires

• EPA radon zone (indoor air): Zone 3: low potential (average indoor radon may be less than 2 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 463 private-well users (95% range 361 to 618; 2010 base), rank 19 of 36 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 52% of 40,951 housing units were built before 1980, above the state share of 49%. Homes built before 1986 are more likely to have lead solder or fittings, so test tap water for lead there.
• PFAS in public water nearby (public supply, not your well): 3 public systems serving this county reported EPA UCMR 5 results; 0 had a PFOA or PFOS sample at or above 4.0 ng/L.

County figures describe where the lab is, not the lab. Sources: USGS 2015 water use and 2017 arsenic estimates, EPA radon zones, Census ACS table B25034 (2020–2024), EPA UCMR 5 (2023–2026); details and links on the sources page.

Before you send a sample

Call the lab to confirm it's currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Bacteria samples have short holding times. Status can change between list updates. To check a status, contact the Oregon certification program.

Is this your lab?

Labs can ask for corrections through the agency that publishes their state list. Homeowner service, prices and turnaround above come only from the lab’s own website. To ask us to correct or remove this listing, write to us (how we handle listings).