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Water Conditioning Contractor License

The license information below is specific to the state of Minnesota.

This license applies to the following occupations:

Plumbers, Pipefitters, and Steamfitters
Supervisors of Construction and Extraction Workers


A license is required for a water conditioning installer or contractor to work in a city with a population of 5,000 or more. Licensed water conditioning persons can only install and service water conditioning equipment in single-family dwellings.

Online Application.

Licensing Authority

Minnesota Department of Labor and Industry
443 Lafayette Road North
St. Paul, MN 55155

Phone: (651) 284-5005
Email: dli.communications@state.mn.us

Data is collected by the Department of Employment and Economic Development.


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