Onterris Laboratories LLC – Wilmington (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

2714 Exchange Drive, Wilmington, NC 28405 · Open in Google Maps

Phone

(910) 212-5856

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 NC, 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.

• Virginia · VA lab 460295 / EPA NC01463 · PFAS · Public samples: ask the lab
  Virginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)
• Washington · EPA NC01463 / WA DOH #296 · PFAS · Public samples: yes (per state)
  WA Ecology - Environmental Laboratories Accredited for Drinking Water Analyses (with scopes) (Information current as of 11/13/2026)
• Pennsylvania · PA DEP 68-05611 · PFAS · Public samples: ask the lab
  PA DEP Accredited Labs Report - Drinking Water (chemistry) (STALE - report dated 6/11/2024)
• New York · NY ELAP 12087 · 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)
• Massachusetts · M-NC1463 · analytes not broken down · Not marked as taking public samples
  MassDEP Certified Laboratories Offering Analytical Services for Private Well Owners and Residential Customers (Created and published on 12/18/2025)
• Alabama · no ID on list · PFAS · Public samples: ask the lab
  ADEM - Out of State Certified Laboratories + ADEM - Certified PFAS Labs (EPA Method 537.1) (Out of State Certified Laboratories: Revised: October 03, 2025; Certified PFAS Labs (EPA Method 537.1): Updated: October 03, 2025)
• Florida · FL DOH E871147 · 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))
• Maryland · 374 · PFAS · Public samples: ask the lab
  Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program) (Latest Revisions: 10/1/2026; PFAS list Last Rev 101/2026)
• West Virginia · 9981 C · PFAS · Public samples: ask the lab
  WV OLS Environmental Drinking Water Laboratory Certification Program - Laboratory Certified Parameter List (printed Thursday, August 20, 2026)
• North Carolina · 37920 · PFAS · Public samples: ask the lab
  NC SLPH Environmental Sciences - Certified Drinking Water Laboratories (Commercial) (generated on request (no date printed), fetched 2026-11-07)

Nearest labs that take homeowner samples

3 other certified labs that take homeowner samples are within 25 miles of this lab. Distances are straight-line from the address on the state list (approx. = ZIP-code centre). “Takes homeowner samples” comes from a state list column or the lab’s own website, as named.

Price and turnaround as printed on each lab’s own website and checked by a second reader; – = not published or not read yet.

Around this lab: New Hanover County, NC

• Private wells: about 56,602 people, 26% of New Hanover County’s 220,358 residents (USGS, 2015); rank 9 of 100 counties in North Carolina by people on wells.
• County health department: New Hanover County Health Department, Environmental Health Services samples wells; bacteria test Water Sample - Bacteriological $140.00 source (read 14 Nov 2026).

• EPA radon zone (indoor air): Zone 3: low potential (average indoor radon may be less than 2 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 1,492 private-well users (95% range 1,006 to 2,224; 2010 base), rank 19 of 100 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 31% of 120,050 housing units were built before 1980, below the state share of 34%. Homes built before 1986 are more likely to have lead solder or fittings, so test tap water for lead there.
• PFAS in public water nearby (public supply, not your well): 8 public systems serving this county reported EPA UCMR 5 results; 1 had a PFOA or PFOS sample at or above 4.0 ng/L.

County figures describe where the lab is, not the lab. Sources: USGS 2015 water use and 2017 arsenic estimates, EPA radon zones, Census ACS table B25034 (2020–2024), EPA UCMR 5 (2023–2026); details and links on the sources page.

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).