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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.