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Fargo | Fergus Falls | Detroit Lakes | Alexandria  

Power Washing


Onsite Wash Co was founded the Summer of 2017 after the owner, Brock Gronwold heard of people waiting over 4 hours in line to get their trucks washed. He knew there had to be a better, more convenient way to get a good wash without having to wait 5 hours. 

Brock took this thought and didn't waste another minute. He invested in equipment and started his mobile pressure washing company immediately. The ability to be mobile solved the convenience issue for truckers waiting in long lines.  Onsite Wash Co brings the wash to you to eliminate lines, eliminate finding a good local truck wash and eliminate the logistics of waiting to get unloaded THEN going to WAIT in line to get a wash.  

Onsite Wash Co washes more than trucks.  Campers and RV's, decks and siding, they can wash it.  Onsite Wash Co also provides 24 Hour emergency jetting services for any clogged pipes, tile or culverts.  


Regular Service Hours:
7 Days a Week: 8AM - 6PM
Office Located at:

18555 260th Street

Fergus Falls, MN 56537

About Us


We are your mobile pressure washing specialists. We Service locations around Fergus Falls, Alexandria and Fargo.

When you need a good wash but don't want to wait, call Onsite Wash, Co.  We come to you and can pressure wash almost anything.

Cars, Trucks, Semis, Farm Equipment,  Decks, Siding, you name it!  Convenience and an exceptional eye for cleanliness make us the areas best choice.  

We Pressure Wash 

​- Semis/Tractor

- Campers/RV's

- House Siding

- Decks/Patios

- Unclog/Jet Pipes

- Unclog/Jet Culverts

- Unclog/Jet Drainage Tile

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