- Machinery, Supplies & Equipment - Business Production Related, Waterville
- Machinery, Supplies & Equipment - Business Supplies Related, Waterville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Waterville
- Mail Delivery Service, Waterville
- Major Appliances, Waterville - Household & Kitchen
- Management Consultants & Services, Waterville
- Manufacturing, Waterville
- Manufacturing Products, Waterville
- Masonry Materials & Supplies, Waterville
- Mausoleums Developers, Waterville
- Mechanical Contractors, Waterville - Install, Service & Repair
- Merchandising & Marketing Consultants, Waterville
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- Methodist Church, Waterville
- Mining, Waterville
- Miscellaneous Government, Waterville
- Miscellaneous Manufacturing, Waterville
- Miscellaneous Personal Services, Waterville
- Miscellaneous Photographers, Waterville
- Miscellaneous Professional, Waterville
- Monuments, Tombstones, Markers & Memorials, Waterville
- Motor Vehicle, Waterville
- Motor Vehicle Rental & Leasing, Waterville
- Moving Supplies & Equipment Rental, Waterville
- Moving Truck Rental , Waterville
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