- Sand Gravel & Aggregate, Trenton
- Sandwich Shop Restaurants, Trenton
- Satellite Dish Antennas & Equipment Dealers, Trenton
- Screen Printing, Trenton
- Secondary Schools, Trenton
- Septic Tank Installation & Repair, Trenton - Septic Systems
- Septic Tank Pumping & Cleaning, Trenton - Septic Systems
- Septic Tanks & Septic Systems Contractors, Trenton - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Septic Tanks & Systems Inspection, Trenton
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- Sewer & Drain Cleaning & Repair, Trenton - Drain Cleaner & Installation Services
- Shopping & Shopping Services, Trenton
- Skating Rink & Hockey Operation Services, Trenton
- Social Services & Welfare, Trenton
- Special Education & Care, Trenton
- Specialty Animal Services, Trenton
- Specialty Stores, Trenton
- Sports Bars & Lounges, Trenton
- Substance Abuse Clinics, Trenton - Alcoholism, Addiction & Drug Abuse Treatment Centers
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