Onterris Laboratories LLC - El Dorado Hills (formerly Enthalpy)

At a glance

What it is certified to test

1 of the 9 common well tests on the OH 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 (Washington list)

Lab facts

Listed by

Ohio (Ohio EPA - Division of Drinking and Ground Waters)

Address

1104 Windfield Way, El Dorado Hills, CA 95762 · Open in Google Maps

Phone

(916) 673-1520

Certificate

The Ohio EPA - Laboratories Certified/Accepted to Perform Analyses on Public Drinking Water (version November 2026) prints no certificate ID or expiry date for this lab.

Public / homeowner samples

Public samples: ask the lab

Ohio EPA list covers public drinking water certification; homeowner acceptance not stated

Location note

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

Left blank on the list

The Ohio list (version November 2026) gives no website for this lab.

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*').

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.

• Vermont · VT 4042 · PFAS · Public samples: ask the lab
  Vermont Department of Health - Laboratories Certified for Drinking Water Analysis (September 28, 2026)
• Virginia · VA lab 460235 / EPA CA00413 · PFAS · Public samples: ask the lab
  Virginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)
• Washington · EPA CA00413 / WA DOH #258 · PFAS · Public samples: yes (per state)
  WA Ecology - Environmental Laboratories Accredited for Drinking Water Analyses (with scopes) (Information current as of 11/13/2026)
• New York · NY ELAP 11411 · PFAS · Public samples: ask the lab
  NY DOH - New York State accredited labs for PFOA/PFOS (EPA 533 / 537.1 v2), private-well rebate program (page fetched 2026-10-29)
• California · CA ELAP 2892 · PFAS · Public samples: yes (per state)
  California ELAP - Accredited Laboratories (map layer) + per-lab Fields of Accreditation (Map layer fetched 2026-11-15; scope PDF as of 2/1/2026)
• Michigan · 9932 · PFAS · Public samples: ask the lab
  EGLE - Certified Out of State Laboratories + EGLE - Out-of-State Certified PFAS Laboratories (9/8/2025 (out-of-state, out-of-state PFAS lists))
• Florida · FL DOH E87777 · PFAS · Public samples: ask the lab
  Florida DOH - Laboratories Certified Under NELAP (DEP Qlik app): Analyte Search + Organization Name and Location Search, Matrix = Drinking Water, Certification Status = Accredited, Active labs (DOH Version: 11/07/2026 08:30:01 (Qlik app refresh 11/9/2026 4:26:47 AM; live database))
• Texas · TX Lab ID T104704189 · PFAS · Public samples: ask the lab
  TCEQ Laboratory Approval Status - List of Accredited Laboratories (public database, Matrix: Drinking Water) (Live database, searched 2026-11-15 ("accurate as of the date and time of the search"))
• Nevada · NV Lab ID CA00413 · PFAS · Public samples: ask the lab
  NDEP Laboratory Approval Status - Certified Lab List (public database, Matrix: Drinking Water) (Live database, searched 2026-11-15 ("accurate as of the date and time of the search"))
• Colorado · CO Lab Cert ID CA00413 · PFAS · Public samples: yes (per state)
  CDPHE Drinking Water Lab Certifications (Looker Studio report on cdphe.colorado.gov/dwlabs) (Live report, no edit date shown; data read by the report at 2026-11-02 20:39 UTC (Looker Studio dataTimestamp))
• Oregon · 4042 · PFAS · 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 Ohio 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).