Maine Water Treatment: Regional Operating Fundamentals
Licensing Structure
The Maine Board of Licensure of Water System Operators, under the Maine CDC/DHHS Drinking Water Program, licenses Water Treatment operators separately from Distribution operators. Maine's Treatment classes are:
| Class | Experience Required |
|---|---|
| VSWS (Very Small Water System) | 6 months operating (or 1 year related) |
| Class I | 1 year operating (or 2 years related) |
| Class II | 2 years operating (or 4 years related) |
| Class III | 3 years operating (or 6 years related) |
| Class IV | 4 years operating (or 8 years related) |
Related (non-operating) experience counts at double the operating-experience requirement. All classes require a high school diploma or GED. Candidates who pass the licensing exam without the required experience may hold Operator-in-Training status but cannot be th