Tshimakain Creek Laboratories, LLC

At a glance

What it is certified to test

2 of the 9 common well tests on the ID 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

not stated: ask the lab

Lab facts

Listed by

Idaho (Idaho Department of Health and Welfare - Idaho Bureau of Laboratories, Drinking Water Laboratory Certification)

Address

5505 E Broadway Ave. #102, Spokane Valley, WA 99212 · Open in Google Maps

Website

t-creek.com

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

Public / homeowner samples

Public samples: ask the lab

Not stated in DHW's certificates or pages.

Location note

Lab is in WA, certified by Idaho (often used as a mail-in lab).

Left blank on the list

The Idaho list (version Tshimakain Creek Laboratories Spokane Valley, WA Inorganics Certificate: 5/1/2026 - 4/30/2027; Tshimakain Creek Laboratories Spokane Valley, WA Microbiological Certificate: 5/1/2026 - 11/21/2026) gives no phone for this lab.

Certification record

Certificate ID

WA01260

Issued by

Idaho Department of Health and Welfare - Idaho Bureau of Laboratories, Drinking Water Laboratory Certification (certification program)

Expiry on the list

11/21/2026 (microbiology); 4/30/2027 (inorganic chemistry) · expires in 6 days

List version

Idaho DHW - Drinking Water Lab Certification (WebLink folder 2940): State of Idaho Drinking Water Certificates, version Tshimakain Creek Laboratories Spokane Valley, WA Inorganics Certificate: 5/1/2026 - 4/30/2027; Tshimakain Creek Laboratories Spokane Valley, WA Microbiological Certificate: 5/1/2026 - 11/21/2026

We fetched it

3 Nov 2026 (file SHA-256 81ab00b1ded8…) · 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*').

Idaho drinking-water certificates on file: Inorganic chemistry, Microbiology (scanned certificates, read by OCR and checked; analytes left out where the scan could not be read with certainty).

Nearest labs that take homeowner samples

3 other certified labs that take homeowner samples are 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: Spokane County, WA

• Private wells: about 59,506 people, 12% of Spokane County’s 490,945 residents (USGS, 2015); rank 7 of 39 counties in Washington by people on wells.
• At house sale: Statewide (WAC 246-272A-0270) has a septic system rule (WAC 246-272A-0270(1)(k)). What it requires

• EPA radon zone (indoor air): Zone 1: highest potential (average indoor radon may be greater than 4 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 3,271 private-well users (95% range 2,513 to 4,228; 2010 base), rank 6 of 37 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 53% of 231,205 housing units were built before 1980, above the state share of 43%. 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): 27 public systems serving this county reported EPA UCMR 5 results; 8 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 Idaho 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).