Grants Pass Water Laboratory, Inc./The Water Lab

At a glance

What it is certified to test

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

Price

not published on the state list: ask the lab for a quote

Turnaround

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

Homeowner samples

yes (Oregon list)

Lab facts

Listed by

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

Address

964 SE M Street, Grants Pass, OR 97526 · Open in Google Maps

Phone

(541) 476-0733

Public / homeowner samples

Public samples: yes (per state)

ORELAP's lab search marks this lab as accepting public samples. OHA's guide to the search explains the filter as: "You can filter for laboratories accepting public samples (these laboratories can accept samples from anyone)." OHA's domestic well testing page sends well owners to its list of accredited labs.

Left blank on the list

The Oregon list (version search as fetched 2026-11-15 (live database, no list date)) gives no website for this lab.

Certification record

Certificate ID

OR100033

Issued by

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

Expiry on the list

12/17/2026 · expires in 32 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 OR100033 - 021 (issued 12/18/2025, list as of 12/18/2025): 29 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: Josephine County, OR

• Private wells: about 45,634 people, 54% of Josephine County’s 84,745 residents (USGS, 2015); rank 5 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 1,867 private-well users (95% range 1,431 to 2,449; 2010 base), rank 5 of 36 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 48% of 39,503 housing units were built before 1980, about the same as 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): 1 public system 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).