EMSL Analytical, Inc.

At a glance

What it is certified to test

4 of the 9 common well tests on the CA 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 (California list)

Lab facts

Listed by

California (California State Water Resources Control Board - Environmental Laboratory Accreditation Program (ELAP))

Address

100 Green Park Industrial Court, Saint Louis, MO 63123 · Open in Google Maps

Phone

(856) 858-4800

Public / homeowner samples

Public samples: yes (per state)

CA ELAP lab type 'Commercial': accepts commercial samples per state list (broader than homeowner); call first

Location note

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

Left blank on the list

The California list (version Map layer fetched 2026-11-15; scope PDF as of 2/27/2026) gives no website for this lab.

Certification record

Certificate ID

CA ELAP 2668

Issued by

California State Water Resources Control Board - Environmental Laboratory Accreditation Program (ELAP) (certification program)

Expiry on the list

2/26/2027 · expires in 103 days

List version

California ELAP - Accredited Laboratories (map layer) + per-lab Fields of Accreditation, version Map layer fetched 2026-11-15; scope PDF as of 2/27/2026

We fetched it

15 Nov 2026 (file SHA-256 cbc97398a144…) · 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*').

29 drinking-water analytes across 3 methods in ELAP Fields of Accreditation 102 Inorganic Chemistry of Drinking Water, 103 Toxic Chemical Elements of Drinking Water. Scope PDF: https://www.waterboards.ca.gov/drinking_water/certlic/labs/documents/elap_certs/1306.pdf (as of 2/27/2026). Primary accreditation body per the scope PDF: OR (California accreditation by reciprocity).

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.

• Missouri · MO cert 165 (chemical + microbiological) · Coliform / E. coli, Nitrate, Arsenic, Lead, Other metals · Public samples: ask the lab
  Missouri DNR - Certified Chemical Laboratories (spreadsheet of all laboratories) + Missouri DNR - Certified Microbiological Laboratories (spreadsheet of all laboratories) (Live export fetched 2026-11-15 (no list date printed in the file))
• Oregon · 4194 · Coliform / E. coli, 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))

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 California 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).