- Warehousing & Storage, South Portland - Warehouse Services
- Waste & Refuse Services & Sites, South Portland
- Waste Disposal & Recycling Services, South Portland
- Watch, Clock & Jewelry Repair, South Portland
- Water & Sewage Utility, South Portland
- Water Transportation, Except Passenger, South Portland
- Water Treatment & Conditioning Systems, Equipment & Supplies, South Portland - Water Softener Companies
- Water Works Contractors Equipment & Supplies, South Portland
- Wedding & Bridal Services, South Portland
- Wedding Dresses & Bridal Gowns, South Portland
- Wedding Supplies & Bridal Shops, South Portland
- Weight Control Centers, South Portland
- Weight Control Consultants, South Portland
- Weight Loss & Control Programs, South Portland
- Welding & Welder, South Portland - Welding Supplies, Machines, Equipment, Services & Contractors
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- Wheelchairs, South Portland
- Wheelchairs Ramps, Lift & Scooters, South Portland
- Wigs, Toupees & Hair Products Stores, South Portland
- Will And Trust Attorneys & Lawyers, South Portland
- Window & Blind Cleaning, South Portland
- Window Blinds, Shades & Window Treatments and Coverings, South Portland - Roller & Roman Shades - Wood, Metal & Vertical Blinds
- Windows, South Portland - Single & Double Hung, Casement, Sliding, Glass Block, Basement Windows & More
- Windows and Doors, South Portland - Wholesale, Manufacturers & Suppliers
- Wireless & Cellular Communications Equipment & Supplies, South Portland
- Women s Clothing Stores, South Portland - Clothes & Accessories
- Women's Fashion Accessories, South Portland - Handbags, Wallets, Scarves, Belts, Necklace, Bracelets, Earrings and more
- Womens Organizations, South Portland
- Woodworking Contractors, South Portland - Carpentry Contractors
- Wound Care Doctors, South Portland - Physicians & Surgeons
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