The following Product Service Codes (PSCs) are commonly associated with NAICS 221320, Sewage Treatment Facilities

PSC W045 Lease or Rental of Equipment—Plumbing, Heating, and Waste Disposal Equipment

Services

PSC S222 Housekeeping—Waste Treatment/Storage

Services

PSC S216 Housekeeping—Facilities Operations Support

Services

PSC H346 Inspection—Water Purification and Sewage Treatment Equipment

Services