Yankton, South Dakota · 3 years in business
Paint-safe hand washing, interior deep cleans, and ceramic coating applied on site.
Everything below this line — the compliance file, operational scorecard, proof-of-work records, dispute protocol, and credentialed reviews — is generated sample content that illustrates the WashAttest record format. It is not real data about Onyx Mobile Detailing. This business is not yet in our directory, so no real data exists for it on this page.
Sample record snapshot
Verified Jul 19, 2026
Trailing 12 months
Attached to this listing
All resolved
Each document is checked against the issuing source and re-verified at renewal. An expired or missing item stays visible on the record.
General liability insurance
Hiscox — $2M / $4M aggregate
verified
Expires Aug 26, 2027
Workers' compensation
Hiscox — statutory limits, 18 employees covered
verified
Expires Dec 28, 2026
Business license
State contractor registration No. 406032
verified
Expires Jun 1, 2027
Stormwater / NPDES permit
No permit on file — no reclamation in use
missing
No expiry on file
OSHA safety program
Documented training program, 2 recordable incidents in 12 months
verified
No expiry on file
Water reclamation and discharge
Trailing 12 months, drawn from 166 documented visits. These are the numbers a star rating hides.
Arrived within the agreed service window
Visits requiring a return trip
Median time to first reply
Documented nightly capacity
Contracts renewed at term
Recordable incidents per 1,000 visits
Documentation attached to this listing and reconciled against billing, so a claim about work performed can be checked rather than taken on faith.
Timestamped photo pairs captured at the start and end of each scheduled visit, retained for 24 months.
Per-visit log recording date, unit identifiers, services performed, and the crew on site.
Current certificate naming the required additional insured, re-verified at each renewal.
Unit-level report reconciling units serviced against units billed for the billing period.
A business can answer a review with evidence. The record shows the claim, the response, the evidence, and the outcome — including when the review was upheld.
No disputes have been filed against this listing.
26 of 33 reviews come from a verified operator role. Roles on this listing: Fleet manager, Vehicle owner, Dealership manager, Rideshare driver, Collector, Small business owner, Realtor.
Lena S.
Fleet manager
Oct 12, 2026
My Mazda CX-5 had not been properly cleaned in two years. The headlights look brand new after they polished them.
Mobile Detailing · Yankton, South Dakota · via Google
Omar Q.
Vehicle owner
Sep 23, 2026
Same-day booking in Yankton and they still took their time. Happy with the detail. It took longer than quoted but the result was worth it.
Mobile Detailing · Yankton, South Dakota · via Direct
Theresa H.
Dealership manager
Aug 31, 2026
I was skeptical about a mobile detail, but my Audi Q5 looks incredible. Quality work. Just note they need access to a power outlet.
Mobile Detailing · Yankton, South Dakota · via Google
Alicia H.
Rideshare driver
Aug 24, 2026
Booked a mobile detail in Yankton and the van pulled up right on time. It rained the next day and the water beaded right off.
Mobile Detailing · Yankton, South Dakota · via Google
Sabrina M.
Collector
Jul 24, 2026
They detailed my Audi Q5 while I was at work in Yankton. Paint looked better than the day I bought it.
Mobile Detailing · Yankton, South Dakota · via Google
Corey G.
Vehicle owner
Jun 9, 2026
The ceramic coating they applied in Yankton has made washing so much easier. The carpets came out two shades lighter.
Mobile Detailing · Yankton, South Dakota · via Google
Renee R.
Dealership manager
May 15, 2026
Had my Ford Explorer detailed in my own driveway in Yankton. It rained the next day and the water beaded right off.
Mobile Detailing · Yankton, South Dakota · via Google
Margot U.
Small business owner
May 8, 2026
Disappointing service from start to finish. The interior was barely touched.
Mobile Detailing · Yankton, South Dakota · via Google
Andre M.
Fleet manager
Apr 20, 2026
They came to my apartment complex in Yankton with their own water and power. Paint looked better than the day I bought it.
Mobile Detailing · Yankton, South Dakota · via Facebook
Yolanda C.
Small business owner
Apr 18, 2026
I have been using them monthly in Yankton for over a year now. They pulled out stains I had written off years ago.
Mobile Detailing · Yankton, South Dakota · via Google
Priscilla C.
Rideshare driver
Apr 13, 2026
They detailed my Ford Explorer while I was at work in Yankton. Happy with the detail. It took longer than quoted but the result was worth it.
Mobile Detailing · Yankton, South Dakota · via Facebook
Ruth Y.
Dealership manager
Mar 29, 2026
Booked a detail for my Jeep Wrangler and it was a mixed bag. The price went up from the quote without explanation.
Mobile Detailing · Yankton, South Dakota · via Google
Chloe W.
Vehicle owner
Mar 25, 2026
Had them out to my place in Yankton for a ceramic coating on my GMC Sierra. Really happy with it, though the price is on the higher end for the area.
Mobile Detailing · Yankton, South Dakota · via Google
Cara F.
Fleet manager
Mar 6, 2026
Booked a gift detail for my dad and his Honda CR-V in Yankton — he was thrilled. They cleaned areas I did not even know were dirty.
Mobile Detailing · Yankton, South Dakota · via Yelp
Aaron Z.
Dealership manager
Feb 28, 2026
The detailer was friendly but the finish was inconsistent. There were still water spots on the glass.
Mobile Detailing · Yankton, South Dakota · via Google
Priya Y.
Collector
Feb 15, 2026
I have been using them monthly in Yankton for over a year now. Great work overall — I just wish the booking window was tighter.
Mobile Detailing · Yankton, South Dakota · via Yelp
Grant L.
Rideshare driver
Jan 31, 2026
Mobile detailing that comes to you in Yankton — exactly what I needed. Only reason it is not five stars is the appointment ran about 30 minutes late.
Mobile Detailing · Yankton, South Dakota · via Google
Tyler O.
Dealership manager
Jan 6, 2026
The convenience of a mobile detail in Yankton is worth every penny. No water spots, no streaks, no shortcuts.
Mobile Detailing · Yankton, South Dakota · via Facebook
Paige I.
Rideshare driver
Dec 29, 2025
Great communication from booking to finish in Yankton. Tires and trim were dressed perfectly — not greasy at all.
Mobile Detailing · Yankton, South Dakota · via Yelp
Rosalind F.
Dealership manager
Dec 23, 2025
My Toyota Tacoma had pet hair everywhere. You would never know now. The whole job took about three hours and it shows.
Mobile Detailing · Yankton, South Dakota · via Google
Tyler P.
Collector
Dec 21, 2025
They treated my Toyota 4Runner like it was their own car. They pulled out stains I had written off years ago.
Mobile Detailing · Yankton, South Dakota · via Yelp
Elijah G.
Fleet manager
Nov 23, 2025
I manage several vehicles and use them for all of them in Yankton. The whole job took about three hours and it shows.
Mobile Detailing · Yankton, South Dakota · via Google
Terrance O.
Realtor
Nov 12, 2025
I manage several vehicles and use them for all of them in Yankton. Happy with the detail. It took longer than quoted but the result was worth it.
Mobile Detailing · Yankton, South Dakota · via Google
Vernon S.
Realtor
Nov 8, 2025
Had them out to my place in Yankton for a ceramic coating on my Hyundai Tucson. The whole job took about three hours and it shows.
Mobile Detailing · Yankton, South Dakota · via Google
Omar H.
Small business owner
Nov 6, 2025
Mobile detailing in Yankton that actually shows up when they say they will. It rained the next day and the water beaded right off.
Mobile Detailing · Yankton, South Dakota · via Yelp
Cecilia T.
Vehicle owner
Oct 30, 2025
Same-day booking in Yankton and they still took their time. The whole job took about three hours and it shows.
Mobile Detailing · Yankton, South Dakota · via Google
Terrance T.
Realtor
Oct 17, 2025
I was skeptical about a mobile detail, but my Ford Explorer looks incredible. Every crevice was spotless, including the vents and cup holders.
Mobile Detailing · Yankton, South Dakota · via Yelp
Molly V.
Dealership manager
Oct 5, 2025
Paint correction on my BMW X5 removed swirls I thought were permanent. They were careful around the trim and badges.
Mobile Detailing · Yankton, South Dakota · via Yelp
Yolanda E.
Dealership manager
Oct 2, 2025
The work was decent but it took much longer than quoted. The appointment was rescheduled twice.
Mobile Detailing · Yankton, South Dakota · via Google
Xavier H.
Dealership manager
Sep 23, 2025
Best mobile car wash I have found in Yankton. They even cleaned the door jambs and the trunk seal.
Mobile Detailing · Yankton, South Dakota · via Google
Sabrina G.
Dealership manager
Aug 22, 2025
The convenience of a mobile detail in Yankton is worth every penny. The paint looks great. The interior vents were slightly overlooked.
Mobile Detailing · Yankton, South Dakota · via Google
Grant B.
Realtor
Jul 20, 2025
My Ford Explorer had pet hair everywhere. You would never know now. Solid detail. The trunk area could have used one more pass.
Mobile Detailing · Yankton, South Dakota · via Facebook
Antonio P.
Rideshare driver
May 10, 2025
Mobile detailing that comes to you in Yankton — exactly what I needed. They took before-and-after photos without me even asking.
Mobile Detailing · Yankton, South Dakota · via Facebook
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Yankton, South Dakota
Paint-safe hand washing, interior deep cleans, and ceramic coating applied on site.
Yankton, South Dakota
Mobile detailing that comes to your driveway or office lot, with interior and exterior packages.
Yankton, South Dakota
Paint-safe hand washing, interior deep cleans, and ceramic coating applied on site.