County health department lab

St. Louis County Department of Health-Environmental Health Laboratories

Berkeley, MO · St. Louis County

Homeowner samplesYou can collect and drop off your own sample
Mail-in kitsNot listed, call to confirm
Walk-in drop offNot listed, call to confirm

Certification and services

State certified
Certification number
R7 MO R01
Certified by
Missouri drinking water program
Certified for
Metals, Microbiology, Radiochemistry
Lab type
County Health
Last verified
September 30, 2026

Listed on the official state certified laboratory list.

Tests this lab is certified for

Coliform Bacteria
Uranium

Certified by the Missouri Department of Natural Resources for drinking water analyses (certificate R7 MO R01, 260): Metals, Microbiology, Radiochemistry. Chemistry certification expires Jul 31, 2026. Bacteriology certification expires Nov 30, 2028. County or city health department laboratory; the usual place for the yearly bacteria test on a private well. Call for bottles, drop-off days and pricing.

How to submit a sample

  1. 1
    Call or check the website for the right bottles

    Bacteria samples need a sterile bottle from the lab. Chemistry samples usually take a clean container the lab supplies.

  2. 2
    Collect from a cold tap before treatment

    Skip softeners and filters. Remove the aerator, run the water 3 to 5 minutes, then fill without touching the inside of the cap.

  3. 3
    Keep it cold and deliver within 24 hours

    Bacteria samples are time-sensitive. Use a cooler with ice packs and hand it in or ship it the same day.

  4. 4
    Read the report against the standards

    Compare results with EPA drinking water limits. If anything is over, our problem pages explain what it means and how to treat it.

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