Matrix Sciences International Inc. dba KTL
Homeowner samples
- Arsenic
- Hardness
- Iron and Manganese
- Lead
- Nitrate / Nitrite
RJ Lee Group, Inc. Columbia Basin Analytical Laboratories is a commercial laboratory in Pasco, WA (Franklin County). It is on the Washington drinking water program's list of certified laboratories (certificate WA01195), and we last checked the list on September 29, 2026.
The lab takes samples from homeowners.
Before you go: Accredited by the Washington Department of Ecology Laboratory Accreditation Program for drinking water analyses (EPA lab ID WA01195, DOH lab number 259): Inorganic chemistry, Metals. Scope expires 2027-07-13. Listed by Ecology as accepting samples from the public. Call for bottles, drop-off hours and pricing.
This profile is built from the official state list of certified drinking water laboratories, checked on September 29, 2026. Well Water Insider does not rate or endorse labs. Run this lab? Claim the profile to add prices, turnaround times, hours and a description.
Listed on the official state certified laboratory list.
How this lab takes samples, based on its listing. Call to confirm hours, bottles and prices.
Published lab fees in Washington: $21 to $55 for a bacteria test and $21 to $55 for nitrate. Washington DOH list of certified labs; the Thurston County water lab charges $32 for each test. Prices at this lab may differ.
Bacteria samples need a sterile bottle from the lab. Chemistry samples usually take a clean container the lab supplies.
Skip softeners and filters. Remove the aerator, run the water 3 to 5 minutes, then fill without touching the inside of the cap.
Bacteria samples are time-sensitive. Use a cooler with ice packs and hand it in or ship it the same day.
Compare results with EPA drinking water limits. If anything is over, our problem pages explain what it means and how to treat it.
From the state certification list and the lab's own listing. Ask which ones it runs for homeowners.
Natural in some bedrock, with no taste or smell. The EPA limit is 0.010 mg/L. Learn more
The cause of orange and black stains. EPA guidelines are 0.3 and 0.05 mg/L. Learn more
Usually from plumbing and older well parts. EPA says there is no safe level. Learn more
From fertilizer, manure and septic systems. The EPA limit is 10 mg/L as nitrogen. Learn more
2710 North 20th Avenue, Pasco, WA 99301
Lab address
Yes. It is on the Washington list of laboratories certified for drinking water testing, last checked September 29, 2026.
Its listing covers arsenic, iron and manganese, lead and nitrate / nitrite. Call to confirm prices and which tests it runs for private well owners.
Yes, the listing says it takes homeowner samples. Get the right bottle from the lab first, especially for bacteria.
Call (509) 792-1951 and visit the lab's website. The address is 2710 North 20th Avenue, Pasco, WA 99301.
Homeowner samples
Homeowner samples
Homeowner samples