# National Testing Laboratories, Mayfield: a corporate campus in Mayfield (2026 guide)

Source: Local AI Registry, https://localairegistry.com/biz/oh/mayfield/national-testing-laboratories-mayfield-oh. Free to reuse with a link back.

By Steve Lee, founder and CEO of Local AI Registry. Fact-checked against 32 sources. Updated 2026-09-02. Owner review: not yet.

Canonical: https://localairegistry.com/biz/oh/mayfield/national-testing-laboratories-mayfield-oh

## In short

National Testing Laboratories is a corporate campus in Mayfield, OH. Its AI Score is 20 of 100, which is poor.

Every fact on this page carries one of three marks: Confirmed (from their website, Google Business Profile, review sites, licensing boards, or measured by Local AI Registry), Visitor submitted (added by a person, with a date and how they know), or AI guess (what AI engines like ChatGPT are saying, not confirmed by anyone). Every mark points to a reference at the end of this page.


## Key facts

| Fact | Value |
| --- | --- |
| Type | Corporate campus |
| Address | 6671 Wilson Mills Rd, Mayfield, OH 44143, USA |
| Hours | Nothing found |
| Phone | (440) 449-2525 |
| Owner | Nothing found |
| Rating | 3.0 across 2 reviews on Google |
| Known for | National Testing Laboratories excels in providing home water testing solutions, particularly through their drinking water test kits and specialized services like WaterCheck. However, customer experiences indicate variability in service reliability. |
| Prices | Nothing found |
| Quietest time | Nothing found |
| Parking | Nothing found |
| Last verified | September 19, 2026, 2:45 PM |


## All the details

Every row is something the owner can add or correct. Each one is marked Confirmed, Visitor submitted or AI guess, with where it came from.

| Group | Fact | Value | Mark | Evidence |
| --- | --- | --- | --- | --- |
| Location info | Address | 6671 Wilson Mills Rd, Mayfield, OH 44143, USA | Confirmed | Google Business Profile, checked Sep 2, 2026 |
| Location info | Description | 6671 Wilson Mills Rd, Mayfield, OH 44143 | Confirmed | Google Business Profile, checked Sep 2, 2026 |
| Location info | Name | National Testing Laboratories | Confirmed | Google Business Profile, checked Sep 2, 2026 |
| Location info | Phone | (440) 449-2525 | Confirmed | Google Business Profile, checked Sep 2, 2026 |
| Services | Service | Bottled water | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Bottled water testing | AI guess | Nothing found |
| Services | Service | Capabilities | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Certifications | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | City check basic | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | City check deluxe | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | City check standard | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | City water testing | AI guess | Nothing found |
| Services | Service | City water tests | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Colored water | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Commercial | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Commercial water testing | AI guess | Nothing found |
| Services | Service | Customer survey | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Drinking water standards | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Food manufacturing | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Home inspectors realtors | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Laboratory forms | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Medical research | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Orderentry fmc | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Quick series | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Sampling instructions | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Shipping labels | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Staffing | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Stephen r tischler | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Symptom checker | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Tap water test kits | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Technical articles | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Watercheck 1 2 | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Water quality symptom checker | AI guess | Nothing found |
| Services | Service | Water sampling instructions | AI guess | Nothing found |
| Services | Service | Water shipping labels | AI guess | Nothing found |
| Services | Service | Water smells | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Water tastes weird | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Water testing for food manufacturing | AI guess | Nothing found |
| Services | Service | Water testing for home inspectors | AI guess | Nothing found |
| Services | Service | Water testing for medical research | AI guess | Nothing found |
| Services | Service | Water testing for realtors | AI guess | Nothing found |
| Services | Service | Water tests | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Well drillers | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Well water testing | Confirmed | Business website, checked Sep 19, 2026 |
| Links | Facebook | https://facebook.com/national-testing-laboratories-132153750136455 | AI guess | Our record |
| Links | Website | https://watercheck.com/ | Confirmed | Google Business Profile, checked Sep 2, 2026 |


## Services and prices

These are the 30 services National Testing Laboratories offers, with the price where we have one and where it came from.

| Service | Price | Price mark | Price evidence | Service mark |
| --- | --- | --- | --- | --- |
| Well water testing |  |  |  | Confirmed |
| Food manufacturing |  |  |  | Confirmed |
| City check basic |  |  |  | Confirmed |
| Tap water test kits |  |  |  | Confirmed |
| Laboratory forms |  |  |  | Confirmed |
| Stephen r tischler |  |  |  | Confirmed |
| Symptom checker |  |  |  | Confirmed |
| Orderentry fmc |  |  |  | Confirmed |
| Medical research |  |  |  | Confirmed |
| Home inspectors realtors |  |  |  | Confirmed |
| Sampling instructions |  |  |  | Confirmed |
| City check deluxe |  |  |  | Confirmed |
| City check standard |  |  |  | Confirmed |
| City water tests |  |  |  | Confirmed |
| Water tastes weird |  |  |  | Confirmed |
| Water tests |  |  |  | Confirmed |
| Well drillers |  |  |  | Confirmed |
| Quick series |  |  |  | Confirmed |
| Bottled water |  |  |  | Confirmed |
| Shipping labels |  |  |  | Confirmed |
| Staffing |  |  |  | Confirmed |
| Technical articles |  |  |  | Confirmed |
| Watercheck 1 2 |  |  |  | Confirmed |
| Water smells |  |  |  | Confirmed |
| Drinking water standards |  |  |  | Confirmed |
| Customer survey |  |  |  | Confirmed |
| Colored water |  |  |  | Confirmed |
| Certifications |  |  |  | Confirmed |
| Capabilities |  |  |  | Confirmed |
| Commercial |  |  |  | Confirmed |


### Known for

National Testing Laboratories excels in providing home water testing solutions, particularly through their drinking water test kits and specialized services like WaterCheck. However, customer experiences indicate variability in service reliability.


## The team

Nothing found


## Visiting National Testing Laboratories

Address: 6671 Wilson Mills Rd, Mayfield, OH 44143, USA. Phone: (440) 449-2525. (Confirmed, Google Business Profile, checked September 2, 2026 at 4:56 PM.)


### Location info from Google Business Profile

Business description, written by National Testing Laboratories on its Google Business Profile: "6671 Wilson Mills Rd, Mayfield, OH 44143"


### When to go

Busy times not read yet, back on Scan Day.


### Parking and getting in

Nothing found


### Nearby

| Place | Type | Distance |
| --- | --- | --- |
| Austin's Smokin' Steakhouse | Steak house | 2 min walk |
| Wilson Mills Rd & Som Center Rd | Bus stop | 2 min walk |
| Mayfield Village Gazebo | Park | 3 min walk |
| Wilson Mills Rd & Som Center Rd | Bus stop | 3 min walk |
| Smokehouse 91 | Restaurant | 3 min walk |
| Wilson Mills Rd & Beta Dr | Bus stop | 3 min walk |


## Reputation

3.0 average across 2 reviews: Google 2. (Confirmed, read September 2, 2026.)

Not enough review detail to summarise confidently. (AI guess, from 2 reviews.)


### What people like

Nothing found


### What people do not like

Nothing found


### Press

No press story about National Testing Laboratories found yet.


### Awards

None named yet.


### Directories

Directory listings not read yet.


## Recent updates from National Testing Laboratories

National Testing Laboratories hasn't posted an update here yet.


## Questions people ask


### best corporate campus in Mayfield

No answer yet


### Worth the hype at National Testing Laboratories?

No answer yet


### where does this place post updates

No answer yet


### how much is a first visit around here

No answer yet


### National Testing Laboratories or Progressive Insurance Training Facility for Home water testing solutions?

No answer yet


### address for National Testing Laboratories in Mayfield, anyone have it?

No answer yet


### Calling this place, or is there a better way?

No answer yet


## What AI gets wrong about National Testing Laboratories

We ask ChatGPT about National Testing Laboratories. These are the answers that disagree with the record.

ChatGPT, read by Local AI Registry on Sep 2, 2026.

No capture has disagreed with the record yet.


## The AI Score: 20 of 100

The AI Score measures how likely AI engines are to recommend a business, and how accurately. Mayfield corporate campus run 20 to 44. Fair starts at 45, good at 65. National Testing Laboratories scores 20, below the Mayfield average of 32. The same method scores every business on the registry.

| Signal | Weight | Score | What it measures | National Testing Laboratories |
| --- | --- | --- | --- | --- |
| Retrieval grounding | 26 | 0 | Whether you appear in the ranked results AI retrieves and cites: AI-Overview citations, organic top-10 for your money queries, and the Bing index ChatGPT leans on. | Poor |
| Off-property attestation | 20 | 41 | Volume and consistency of what others say about you: YouTube mentions, branded web mentions, third-party “best-of” lists. The cause of retrievability. | Poor |
| AI visibility | 14 | 0 | Whether ChatGPT, Gemini, Perplexity, and AI Overviews name you, and whether they name you for the right service. | Nobody at all was recommended in the 1 answer we hold, so there is nothing to score. |
| Reviews & response | 12 | 8 | The star average is only one input. We also read volume, velocity, the specificity of review language, and response cadence. Specific reviews are what AI quotes verbatim. | Poor |
| Backlink & citation authority | 8 | 60 | Domain authority and editorial quality of the sources that attest to you. | Fair |
| Google Business Profile | 8 | 67 | Required and recommended fields; update cadence. The listing AI pulls from first. | Good |
| Speed & mobile | 7 | 53 | Core Web Vitals at the 75th percentile, on a real phone. | Fair |
| Content freshness & schema | 5 | 81 | Crawl recency, intent alignment, valid JSON-LD, canonicals. | Good |

Full method: https://localairegistry.com/methodology


## How AI decides what to tell you about a corporate campus

When you ask ChatGPT, Gemini or Google about a local business, the AI doesn't visit it. It reads what's already written about it: the business's website, its Google Business Profile, review sites, news stories and directories like this one. Then it repeats what those sources agree on.

That's why AI gets small facts wrong. If Yelp says a place is open Mondays and the website says it isn't, the AI has to pick one. The table above shows the answers that disagree with the record today.

The more sources agree, and the more specific they are, the more confidently AI recommends a business. A review that names who helped and what they did tells an AI far more than one that says "great place."


## How to choose a corporate campus in Ohio, with or without AI

A few checks take ten minutes and tell you more than any rating.

- Check that the hours and phone number match on Google, Yelp and the business's own website. Mismatches are how people end up at a locked door.
- Read reviews that name a person and what they did. Vague praise is easy to fake.
- Look for recent reviews and recent posts. A page nobody has touched in a year may not match the business today.
- Ask for the price before you go, and ask what it includes.
- Where the work needs a license, ask whose license it is and look it up with Ohio.


## How to read the marks on this page

- Confirmed (solid circle): from a known source. The business website, its Google Business Profile, review sites like Yelp, Healthgrades and RealSelf, a licensing board, or measured by Local AI Registry.
- Visitor submitted (hollow circle): added or corrected by a person, with the date and how they know, like a phone call or a visit.
- AI guess (hollow triangle): what AI engines are saying right now. Nobody has confirmed it.


## About the author

Steve Lee is the founder and CEO of Local AI Registry and sets its editorial standards. He is a former Google executive in Search and a former Microsoft executive, with more than 20 years in digital: search, local discovery, and how people find businesses online. He is based in Irvine.

- Expertise: search at Google and Microsoft, AI search, answer engine optimization, generative engine optimization, local SEO, structured data and entity mapping.
- Industry: medical aesthetics, injectables, med spa operations and marketing.
- Disclosure: Local AI Registry sells services to business owners, including National Testing Laboratories if it claims this page. That does not change what this page says. Every fact carries its source.


## Entity map

Every person, place, organization and treatment named on this page, with a stable ID and a public reference. The JSON-LD below connects them to each other.

| Entity | Type | ID on this page | Same as | Relationship to National Testing Laboratories |
| --- | --- | --- | --- | --- |
| National Testing Laboratories | LocalBusiness | #business | https://watercheck.com/ | Subject of this page |
| Mayfield, Ohio | City | #city | Nothing found | City National Testing Laboratories is in |
| Local AI Registry | Organization | #publisher | https://localairegistry.com | Publisher of this page |
| Steve Lee | Person | #author | https://localairegistry.com/team | Author of this page |


## Topical map

Where this page sits in the registry. It's one profile among the corporate campus in Mayfield, linked to the lists and towns around it.


### Lists

- Best corporate campus in Mayfield: https://localairegistry.com/leaderboards/oh/mayfield/corporate-campus
- Best businesses in Mayfield: https://localairegistry.com/leaderboards/oh/mayfield


### Nearby

- /columbus: https://localairegistry.com/leaderboards/oh/columbus
- /cleveland: https://localairegistry.com/leaderboards/oh/cleveland
- /toledo: https://localairegistry.com/leaderboards/oh/toledo
- /grove-city: https://localairegistry.com/leaderboards/oh/grove-city
- /gahanna: https://localairegistry.com/leaderboards/oh/gahanna
- /dublin: https://localairegistry.com/leaderboards/oh/dublin


### Every list

- Every leaderboard in Ohio: https://localairegistry.com/leaderboards/oh


## Frequently asked questions


### What is AI search optimization for local business?

Getting a business named when a neighbor asks ChatGPT, Gemini, or Perplexity for a recommendation. Some call it AI SEO, some call it generative engine optimization. Traditional SEO fights for ten blue links; this fights for the one answer an assistant says out loud. The AI Score on this page measures the eight signals that drive it.


### What is Local AI Registry?

The public record of how AI sees local business. We score every business we list by one published method, we keep the questions people ask about it in one place, and we never sell rank. Looking up any business here is free.


### How does this page help a business get recommended by AI?

Assistants read public pages before they answer. This one states what the business does, what people ask about it, and what the Record answers, in one place a machine can read. Correcting what is wrong here changes what an assistant repeats next.


### Who writes the answers here?

Registry AI writes the first answer under every question, from the Record and the public sources named beneath it. Neighbors write the rest under pseudonyms. A registered owner can reply as the business, and their reply says so.


### I own National Testing Laboratories. How do I fix something or rank higher?

Register the page. It is free, it takes about five minutes, and it lets you correct the Record and reply as the business. Nothing on this page is for sale, so the only thing that moves the score is the work.


## References


### Sources cited

- [1] Google Business Profile, https://www.google.com/maps/place/?q=place_id:ChIJTW2yuxABMYgR8wGRaOhkUPM (accessed Sep 2, 2026)
- [2] watercheck.com, https://watercheck.com/collections/well-water-testing (accessed Sep 19, 2026)
- [3] watercheck.com, https://watercheck.com/pages/stephen-r-tischler (accessed Sep 19, 2026)
- [4] watercheck.com, https://watercheck.com/collections/symptom-checker (accessed Sep 19, 2026)
- [5] watercheck.com, https://watercheck.com/pages/tap-water-test-kits (accessed Sep 19, 2026)
- [6] watercheck.com, https://watercheck.com/pages/technical-articles (accessed Sep 19, 2026)
- [7] watercheck.com, https://watercheck.com/products/watercheck-1-2 (accessed Sep 19, 2026)
- [8] watercheck.com, https://watercheck.com/pages/water-smells (accessed Sep 19, 2026)
- [9] watercheck.com, https://watercheck.com/pages/water-tastes-weird (accessed Sep 19, 2026)
- [10] watercheck.com, https://watercheck.com/pages/water-tests (accessed Sep 19, 2026)
- [11] watercheck.com, https://watercheck.com/pages/well-drillers (accessed Sep 19, 2026)
- [12] watercheck.com, https://watercheck.com/pages/bottled-water (accessed Sep 19, 2026)
- [13] watercheck.com, https://watercheck.com/pages/capabilities (accessed Sep 19, 2026)
- [14] watercheck.com, https://watercheck.com/pages/certifications (accessed Sep 19, 2026)
- [15] watercheck.com, https://watercheck.com/products/city-check-basic (accessed Sep 19, 2026)
- [16] watercheck.com, https://watercheck.com/products/city-check-deluxe (accessed Sep 19, 2026)
- [17] watercheck.com, https://watercheck.com/products/city-check-standard (accessed Sep 19, 2026)
- [18] watercheck.com, https://watercheck.com/collections/city-water-tests (accessed Sep 19, 2026)
- [19] watercheck.com, https://watercheck.com/pages/colored-water (accessed Sep 19, 2026)
- [20] watercheck.com, https://watercheck.com/pages/commercial (accessed Sep 19, 2026)
- [21] watercheck.com, https://watercheck.com/pages/customer-survey (accessed Sep 19, 2026)
- [22] watercheck.com, https://watercheck.com/pages/drinking-water-standards (accessed Sep 19, 2026)
- [23] watercheck.com, https://watercheck.com/pages/food-manufacturing (accessed Sep 19, 2026)
- [24] watercheck.com, https://watercheck.com/pages/home-inspectors-realtors (accessed Sep 19, 2026)
- [25] watercheck.com, https://watercheck.com/pages/laboratory-forms (accessed Sep 19, 2026)
- [26] watercheck.com, https://watercheck.com/pages/medical-research (accessed Sep 19, 2026)
- [27] watercheck.com, https://watercheck.com/pages/orderentry-fmc (accessed Sep 19, 2026)
- [28] watercheck.com, https://watercheck.com/collections/quick-series (accessed Sep 19, 2026)
- [29] watercheck.com, https://watercheck.com/pages/sampling-instructions (accessed Sep 19, 2026)
- [30] watercheck.com, https://watercheck.com/collections/shipping-labels (accessed Sep 19, 2026)
- [31] watercheck.com, https://watercheck.com/pages/staffing (accessed Sep 19, 2026)
- [32] AI engine output: ChatGPT, read by Local AI Registry on Sep 2, 2026, https://localairegistry.com/methodology (accessed Sep 19, 2026)