National Testing Laboratories, Ltd.

At a glance

What it is certified to test

5 of the 9 common well tests on the VT 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 (Vermont list)

Lab facts

Listed by

Vermont (Vermont Department of Health - Public Health Laboratory)

Address

556 S. Mansfield St, Ypsilanti, MI 48197 · Open in Google Maps

Phone

(734) 483-8333

Website

watercheck.com

Public / homeowner samples

Public samples: yes (per state)

Highlighted green on VT list = accepts private samples

Location note

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

Certification record

Certificate ID

VT 40014

Issued by

Vermont Department of Health - Public Health Laboratory (certification program)

Expiry on the list

11/30/2026 · expires in 15 days

List version

Vermont Department of Health - Laboratories Certified for Drinking Water Analysis, version September 28, 2026

We fetched it

15 Nov 2026 (file SHA-256 c9d664974c46…) · open the state file

Tests on the state list

Detailed scope sheet embedded in the state PDF: National Testing Laboratories - Ypsilanti, MI renewal Nov 30 2025 NF .pdf

• 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 460309 / EPA MI00044 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
  Virginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)
• Pennsylvania · PA DEP 68-00362 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
  PA DEP Accredited Labs Report - Drinking Water (chemistry + microbiology) (STALE - report dated 6/11/2024)
• Massachusetts · M-MI044 · Coliform / E. coli, Lead, PFAS, Uranium · Public samples: yes (per state)
  MassDEP Certified Laboratories Offering Analytical Services for Private Well Owners and Residential Customers (Created and published on 12/18/2025)
• California · CA ELAP 2568 · Nitrate, Arsenic, Lead, Manganese, VOCs, Other metals · 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 7/1/2026)
• Missouri · MO cert 500 (chemical) · Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: ask the lab
  Missouri DNR - Certified Chemical Laboratories (spreadsheet of all laboratories) (Live export fetched 2026-11-15 (no list date printed in the file))
• Tennessee · 02960 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: ask the lab
  TDEC Division of Water Resources - Commercial Laboratories Certified for Drinking Water Analysis + TDEC Division of Water Resources - Microbiological Laboratories Certified for Drinking Water Analyses (10/2/2026 (page footers 10/06/2026); As of October 2, 2026 (PDF title; page footers 10/06/2026))
• Georgia · GA Lab # C036 · Lead, Other metals · Public samples: ask the lab
  Laboratories Certified by Georgia for Chemical Monitoring + Laboratories Certified by Georgia for Lead and Copper Monitoring (January 9, 2025)
• Alabama · no ID on list · analytes not broken down · Public samples: ask the lab
  ADEM - Out of State Certified Laboratories (Revised: October 03, 2025)
• Michigan · 0055 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
  EGLE - State of Michigan Certified Laboratories: Chemistry + EGLE - State of Michigan Certified Laboratories: Microbiological + EGLE - State of Michigan Certified Laboratories: Lead and Copper + EGLE - Certified Radiological Laboratories (SOM Certified Labs - Chemistry 3/11/2026 (chemistry, microbiological, lead and copper lists); 9/8/2025 (radiological list))
• Illinois · IEPA 200084; IDPH Lab # 170055 · Coliform / E. coli, Nitrate, Arsenic, Lead, Manganese, Other metals · Public samples: ask the lab
  IEPA Accredited Laboratories (Primary Labs / Secondary Labs) - Laboratories Accredited for Chemical Analysis + Illinois Department of Public Health - Certified Water Microbiology Laboratories + TNI LAMS fields of accreditation (Drinking Water, accrediting body IL ELAP) (12/09/2025 (date in the file name; the PDF prints no date); Revision Date Thursday, December 4, 2025; TNI LAMS as fetched 2026-11-15)
• Florida · FL DOH E87753 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · 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 T104704228 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · 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"))
• Louisiana · LA020 · Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: yes (per state)
  LDH - 2026 List of Laboratories Certified by Louisiana for Drinking Water Analyses - Chemistry (Current as of 2/12/2026)
• Nevada · NV Lab ID MI00044 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · 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 MI00044 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · 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))
• Kansas · KS Lab ID E-10351 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
  KDHE Approved Laboratory Search (AB Manager public database, Matrix: Drinking Water) (Live database, searched 2026-11-15 ("believed to be accurate at the time of the search"))
• Maryland · 205 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: ask the lab
  Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program) (Latest Revisions: 10/1/2026)
• West Virginia · 9903 C · Nitrate, Arsenic, Lead, VOCs, Other metals · Public samples: ask the lab
  WV OLS Environmental Drinking Water Laboratory Certification Program - Laboratory Certified Parameter List (printed Thursday, August 20, 2026)
• North Carolina · 26700 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
  NC SLPH Environmental Sciences - Certified Drinking Water Laboratories (Commercial) (generated on request (no date printed), fetched 2026-11-07)
• Arizona · AZ0651 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
  ADHS Safe Drinking Water Commercial Lab List (List of Arizona Certified Commercial Drinking Water Laboratories) (current as of Saturday, November 7, 2026)
• Puerto Rico · no ID on list · analytes not broken down · Public samples: ask the lab
  Departamento de Salud de Puerto Rico, Sección de Agua Potable - Laboratorios y Parámetros Certificados (Revisado agosto 2025)
• Indiana · C-MI-06 / M-MI-03 · Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: ask the lab
  IDOH - Find a Certified Out-of-State Drinking Water Laboratory (program page table) (page as fetched 2026-11-07 (no date printed))
• Rhode Island · LAO00314 · Coliform / E. coli · Public samples: ask the lab
  RIDOH - Out of State Analytical Laboratories (March 18, 2026)
• New Mexico · MI00044 · Coliform / E. coli, Lead, VOCs, Other metals · Public samples: ask the lab
  Laboratories Certified by NMED-DWB to Analyze Drinking Water Samples for Water Systems in New Mexico (Last Updated: 10/26/2026)
• Idaho · MI00044 · Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: ask the lab
  Idaho DHW - Drinking Water Lab Certification (WebLink folder 2940): State of Idaho Drinking Water Certificates (National Testing Laboratories Ypsilanti, MI Inorganics Certificate: 1/1/2026 - 12/31/2026; National Testing Laboratories Ypsilanti, MI Organics Certificate: 1/1/2026 - 12/31/2026)

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: Washtenaw County, MI

• Private wells: about 66,798 people, 19% of Washtenaw County’s 358,880 residents (USGS, 2015); rank 9 of 83 counties in Michigan by people on wells.
• At house sale: Washtenaw County Health Department (Time of Sale Program) has a septic system and well rule (Washtenaw County Regulation for the Inspection of Residential Onsite Water and Sewage Disposal Systems at Time of Property Transfer). What it requires

• EPA radon zone (indoor air): Zone 1: highest potential (average indoor radon may be greater than 4 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 5,310 private-well users (95% range 3,937 to 7,157; 2010 base), rank 13 of 82 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 53% of 159,782 housing units were built before 1980, below the state share of 62%. 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): 10 public systems serving this county reported EPA UCMR 5 results; 0 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 Vermont 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).