Port-O Johnny is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Septic Tanks & Systems Cleaning & Repairing
• Septic Tanks Cleaning & Pumping

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Septic Tanks & Systems > Septic Tanks & Systems Repairing
• Septic Tank And Related Services > Septic Cleaning

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Septic Tanks & Systems > Septic Systems Installation & Repair
• Repair Shops And Related Services, Nec > Cleaning Services > Septic Tank & Systems Cleaning