Cahoy Pump Service, Inc., Sumner, IA: Well Pump Service

Licenses

✓ On the Iowa Department of Natural Resources certification list✓ On the Wisconsin Department of Natural Resources license list Well Pump RepairWell PluggingPump InstallationWater Well Drilling Phone matches its Google profile

License holder	Classes	State list	License
Mark Claassen	Certified Well Driller, Certified Pump Installer	Iowa Department of Natural Resources	1899
Darin Cahoy	Certified Well Driller, Certified Pump Installer	Iowa Department of Natural Resources	1786
Lloyd Wurzer	Certified Pump Installer	Iowa Department of Natural Resources	8525
Cahoy Pump Service INC	Well Driller, Pump Installer	Wisconsin Department of Natural Resources	8571
Kaes Degroot	Well Driller, Pump Installer	Wisconsin Department of Natural Resources	8858

From the Iowa DNR Certified Well Drillers and Certified Pump Installers list (Iowa Department of Natural Resources), read October 7, 2026. From the Well drilling services and pump installing services directories list (Wisconsin Department of Natural Resources), read October 7, 2026. The state list names the licensed person, Mark Claassen, not a business; this page uses the business name on the Google profile that has the same phone number. Ask which licensed person will do the work, and for the license number.

Call (563) 578-1130 Visit website More well pros in Iowa

What Cahoy Pump Service, Inc.'s website says

Services listed on Cahoy Pump Service, Inc.'s website, read October 11, 2026: water well drilling, well pump repair, pump replacement and installation and well cleaning and disinfection. cahoypump.com

It says	Details	Page
Licences, certifications, memberships	Master Groundwater Contractor (NGWA) and Certified Pump Installer (NGWA)	cahoypump.com

Read on cahoypump.com on October 11, 2026 (3 pages). This is what the business says about itself; we have not checked the credentials it names with the issuing body.

Where you will find Cahoy Pump Service, Inc.

These are the city pages close enough for this business to appear on.

Decorah, IA(34 mi)

Other well pump pros nearby

Business	Services	Distance
Fairbank Plumbing & Heating LLC	Well Pump Repair, Well Plugging, Pump Installation	16 mi
Aurora Plumbing & Electric	Well Pump Repair, Well Plugging, Pump Installation	24 mi
Geothermal Eco Options	Water Well Drilling	34 mi
Mracek Plumbing and Heating	Well Pump Repair, Well Plugging, Pump Installation	34 mi
Mills Inc	Well Pump Repair, Well Plugging, Pump Installation	35 mi
Oasis Well & Pump	Well Pump Repair, Well Plugging, Pump Installation	39 mi

Questions about Cahoy Pump Service, Inc.

Is Cahoy Pump Service, Inc. licensed?

5 licenses for this business are on the Iowa Department of Natural Resources and Wisconsin Department of Natural Resources lists we read on October 7, 2026, including #1899 held by Mark Claassen. Ask to see the license before work starts, since a license can lapse between checks.

What does Cahoy Pump Service, Inc. do?

Their listing covers well pump repair, well plugging, pump installation, water well drilling. Call to confirm the service you need, because offerings change.

What areas does Cahoy Pump Service, Inc. serve?

They are based in Sumner, Iowa, within driving distance of Decorah. Service areas are set by the business, so confirm yours when you call.

How do I reach Cahoy Pump Service, Inc.?

Call (563) 578-1130. Their website is linked on this page.

Compiled from public records and public business information. Not an endorsement. Check licensing before you hire.

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