Matrix Sciences International Inc. dba KTL

At a glance

What it is certified to test

4 of the 9 common well tests on the WA 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 (Washington list)

Lab facts

Listed by

Washington (Washington State Department of Ecology - Lab Accreditation Program (with WA DOH))

Address

1320 E Spokane Street, Pasco, WA 99301 · Open in Google Maps

County

Franklin

Phone

(509) 547-3838

Public / homeowner samples

Public samples: yes (per state)

WA Ecology Lab Search label 'Accepts Commercial/Public Samples' (broader than homeowner: confirm the lab takes household samples)

Left blank on the list

The Washington list (version Information current as of 11/13/2026) gives no website for this lab.

Certification record

Certificate ID

EPA WA00060 / WA DOH #109

Issued by

Washington State Department of Ecology - Lab Accreditation Program (with WA DOH) (certification program)

Expiry on the list

09/02/2027 · expires in 291 days

List version

WA Ecology - Environmental Laboratories Accredited for Drinking Water Analyses (with scopes), version Information current as of 11/13/2026

We fetched it

15 Nov 2026 (file SHA-256 e7c9dab549d5…) · 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*').

35 drinking-water analytes on the WA scope (General Chemistry, Metals).

Also certified by other states

Same business (same street address and ZIP) on another state's official list. Each state certifies separately, so each listing keeps its own source.

• Oregon · 4084 · Nitrate, Arsenic, Lead, Manganese, Other metals · Public samples: yes (per state)
  ORELAP laboratory search (ODIE): accredited for the Drinking Water matrix (search as fetched 2026-11-15 (live database, no list date))

Nearest labs that take homeowner samples

4 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: Franklin County, WA

• Private wells: about 11,824 people, 13% of Franklin County’s 88,807 residents (USGS, 2015); rank 22 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 2: moderate potential (average indoor radon may be between 2 and 4 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 3,212 private-well users (95% range 2,600 to 3,984; 2010 base), rank 7 of 37 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 37% of 31,183 housing units were built before 1980, below 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): 2 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 Washington 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).