Hawaii Water Chlorination and Sanitation (C-37d) Contractor License

The Water Chlorination and Sanitation (C-37d) Contractor License allows you to do the following work:

• Chlorinate or sanitize water or water lines
• Repair water lines and additions to water lines
• Check bacterial count in the water or water lines

If you are looking for a contractor's license with a broader scope of work, you may want to consider getting a Hawaii Plumbing (C-37) Contractor License instead.