The CLERC Lab
The CLERC Lab is the only accredited microbiology lab in Lake County. The lab is setup to report results to the Division of Drinking Water when required.
CLERC operates a water quality testing laboratory at the Carnegie Library in Lakeport, CA. The CLERC Lab offers the service of analyzing drinking water and wastewater for total coliform and E. coli. The CLERC Lab is accredited through the California Environmental Laboratory Accreditation Program (ELAP), Certificate No. 3056, for the following tests:
Our Lab Services
Receiving samples by appointment only
If you are interested in having your water tested at the CLERC Lab, please contact
the Lab Manager at:
707-261-0008 ext.2 or email lab@theclerc.org
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Water Quality
Total coliform P/A - E. coli P/A
Total coliform enumeration - E. coli enumerationWaste Water
Total coliform enumeration - E. coli enumeration
Biochemical Oxygen Demand - Inorganic constituents in non-potable water -
Download the Chain of Custody PDF form
Download the Chain of Custody Excel (.xls) file
Download the Instructions for Completing the Chain of Custody Form -
Download Sampling Instructions
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ELAP Certificate #3056 (2/28/2026)
ELAP Fields Accreditation -
CLERC is a 501(c)3 nonprofit organization - Tax Identification Number (TIN): 47-1489147
CLERC Insurance provisions include comprehensive liability and Errors and Omissions coverage.
CLERC is registered with the U.S. General Services Administration’s SAM (System for Award Management) system, ID # 8GTL9
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The lab’s fee schedule
Designed for routine compliance sampling and operational reporting. Fees below reflect CLERC Lab’s accredited microbiology testing services for drinking water and wastewater.
Receiving samples by appointment only. To schedule drop-off or confirm requirements, contact the Lab Manager at 707-261-0008 ext. 2 or lab@theclerc.org.
Drinking Water
Field of Testing: 101 – Microbiology of Drinking Water
| Parameter | Method | Fee |
|---|---|---|
| Coliform (Total & E. coli) – Presence/Absence | SM 9223 B Colilert | $56 |
| Coliform (Total & E. coli) – Enumeration | SM 9223 B Colilert | $84 |
Note: Ensure proper chain of custody documentation accompanies each submission when required for regulatory reporting.
Wastewater
Field of Testing: 107 – Microbiological Methods for Non-Potable Water and Sewage Sludge
| Parameter | Method | Fee |
|---|---|---|
| Total Coliform – Enumeration (15 tube) | SM 9221 B-2014 | $82 |
Wastewater
Field of Testing: 108 – Inorganic Constituents in Non-Potable Water
| Parameter | Method | Fee |
|---|---|---|
| Biochemical Oxygen Demand | SM 5210 B | $90 |
Other Fees and Charges
Additional services available upon request.
| Item | Fee |
|---|---|
| Rush Service – Drinking Water (results in 24 hours) | add $25 |
| Electronic Data Deliverable (EDD) – client reporting | add $20 |
| After Hours Fee (sample drop off outside of regular business hours) | add $200 per client per day |
For recurring municipal or facility workflows, we’re happy to align appointment windows and reporting preferences to support your operational schedule.