PFAS Water Testing Labs in California (32 state-certified labs)
Labs on California's official certification list that test drinking water for PFAS, with the ones that take homeowner samples first.
32 named for PFAS itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside California but on its list.
USGS estimate for California.
How many labs test for PFAS in California
32 labs on California's official drinking-water lab list are certified to test for PFAS. All 32 are named for PFAS on the list. 25 of them are marked as taking samples from the public. They are listed first. 14 are located outside California.
The list is published by the California State Water Resources Control Board - Environmental Laboratory Accreditation Program (ELAP). These labs come from list files with 25 different dates; each lab page shows its own. Fetched 2026-11-15 (UTC).
California labs certified for PFAS
Marked as taking public samples (25)
| Lab | Location | PFAS certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| Alliance Technical Group, LLC - Akron | Cuyahoga Falls, OH | Named on the official list | Public samples: yes (per state) | 6/30/2027 |
| Alpha Analytical Laboratories Inc. - North Bay | Petaluma, CA | Named on the official list | Public samples: yes (per state) | 3/31/2028 |
| ALS Environmental - Kelso | Kelso, WA | Named on the official list | Public samples: yes (per state) | 2/10/2027 |
| American Water Central Laboratory | Belleville, IL | Named on the official list | Public samples: yes (per state) | 10/31/2027 |
| Babcock Laboratories, Inc. | Riverside, CA | Named on the official list | Public samples: yes (per state) | 5/31/2028 |
| Battelle Norwell Laboratory | Norwell, MA | Named on the official list | Public samples: yes (per state) | 6/30/2027 |
| BSK Associates | Fresno, CA | Named on the official list | Public samples: yes (per state) | 4/30/2028 |
| Bureau Veritas Canada (2019) Inc. | Mississauga, Ontario, CN | Named on the official list | Public samples: yes (per state) | 7/31/2026 Date on list has passed |
| EMSL Analytical Inc. | Cinnaminson, NJ | Named on the official list | Public samples: yes (per state) | 6/30/2027 |
| Eurofins Lancaster Laboratories Environment Testing, LLC | Lancaster, PA | Named on the official list | Public samples: yes (per state) | 1/31/2026 Date on list has passed |
| Eurofins Pomona | Pomona, CA | Named on the official list | Public samples: yes (per state) | 6/18/2027 |
| Eurofins Sacramento | West Sacramento, CA | Named on the official list | Public samples: yes (per state) | 1/31/2028 |
| Eurofins South Bend | South Bend, IN | Named on the official list | Public samples: yes (per state) | 6/30/2027 |
| GEL Laboratories, LLC | Charleston, SC | Named on the official list | Public samples: yes (per state) | 10/31/2026 Date on list has passed |
| K Prime, LLC. | Santa Rosa, CA | Named on the official list | Public samples: yes (per state) | 5/31/2027 |
| McCampbell Analytical, Inc. | Pittsburg, CA | Named on the official list | Public samples: yes (per state) | 11/2/2027 |
| Microbac Laboratories, Inc. - Marietta Division | Marietta, OH | Named on the official list | Public samples: yes (per state) | 12/9/2027 |
| Onterris Laboratories, LLC | El Dorado Hills, CA | Named on the official list | Public samples: yes (per state) | 1/31/2028 |
| Pace Analytical Services, LLC - Ormond Beach FL | Ormond Beach, FL | Named on the official list | Public samples: yes (per state) | 6/30/2027 |
| Pace Analytical Services, LLC -Mansfield MA | Mansfield, MA | Named on the official list | Public samples: yes (per state) | 9/5/2027 |
| SGS North America Inc. | Wilmington, NC | Named on the official list | Public samples: yes (per state) | 6/30/2027 |
| SGS North America, Inc. | Clovis, CA | Named on the official list | Public samples: yes (per state) | 9/30/2028 |
| SGS North America, Inc. - Orlando | Orlando, FL | Named on the official list | Public samples: yes (per state) | 12/15/2026 |
| Torrent Laboratory, Inc | Milpitas, CA | Named on the official list | Public samples: yes (per state) | 4/30/2028 |
| Weck Laboratories, Inc. | City of Industry, CA | Named on the official list | Public samples: yes (per state) | 3/31/2028 |
Other labs on the list (7)
| Lab | Location | PFAS certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| Irvine Ranch Water District | Irvine, CA | Named on the official list | Public samples: ask the lab | 1/31/2028 |
| Orange County Water District Laboratory | Fountain Valley, CA | Named on the official list | Public samples: ask the lab | 2/28/2028 |
| Santa Clara Valley Water District | San Jose, CA | Named on the official list | Public samples: ask the lab | 5/31/2028 |
| Santa Clarita Valley Water Agency Laboratory | Santa Clarita, CA | Named on the official list | Public samples: ask the lab | 9/30/2027 |
| City of Los Angeles Dept. of Water & Power, Water Quality Laboratory | Pasadena, CA | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 9/30/2028 |
| Environmental Monitoring Div. (EMD) Lab. at Hyperion Treatment Plant (HTP) | Playa Del Rey, CA | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 1/31/2028 |
| Inland Empire Utilities Agency - Laboratory | Chino, CA | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 10/31/2028 |
How the California list marks public samples (whole list). ELAP's map layer gives each lab a type. Labs of type 'Commercial' take commercial samples; that is broader than 'homeowner', so call before you send a sample. Other lab types (city, water district, wastewater, industrial ...) are not marked either way.
Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.
Why test for PFAS in California
EPA's 4.0 ng/L limits for PFOA and PFOS cover public water, not private wells, and its May 2026 proposals to roll back four other PFAS limits are not final. Read our PFAS explainer.
About 1,435,510 people in California used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [1] Federal limits are written for public water systems, not private wells, so testing is up to the owner.
For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: California.
Other tests in California
California ELAP - Accredited Laboratories (map layer) + per-lab Fields of Accreditation.
Official source