22 1360 - Septic Tank and Leachfield Systems
33 0530 - Culverts, Manholes and Structures
33 3500 - Packaged Sewerage Treatment
- AK Industries
- BARR Plastics
- Bio-Microbics - Advanced wastewater treatment systems for decentralized homes, subdivisions, marine, and commercial properties.
- Chem-Tainer Industries - Plastic tanks
- Clearstream Wastewater Systems
- Crest Precast - Tanks to 30,000 gallons, septic, holding, grease iterceptors, fire protection, storm water, pump stations, etc.
- CULTEC is a national manufacturer of plastic chambers for stormwater and septic applications.
- Eljen Corporation - Geotextile San Filter (GSF), pretreats effluent, virtually no biomat forms on infiltrative soil level, main cause of septic failure.
- Equaris Corporation - Sustainable onsite water recycling and wastewater treatment systems.
- Front Range Precast Concrete - Primarily AZ, CO, NM, UT, WY
- Infiltrator Systems
- Jensen Precast - Precast concrete products for utility, wastewater, and infrastructure applications. 12 facilities serving the western U.S.
- Norwalk Wastewater Equipment Company
- Oldcastle Precast
- Orenco Systems designs and manufactures leading-edge products for collection, treatment, and monitoring of decentralized wastewater.
- Pyramid Precast
- Roth Industries - Roth MultiTank Septic Tanks
- Shea Concrete - Shea Concrete has a reputation as New England's most reputable precast concrete manufacturers, since 1949.
- Waterloo Biofilter Systems
- Webtrol Pumps
- Zabel Environmental Technology