33 3500 - Packaged On-site Water Treatment
See also: 22-1360 - Septic Tank and Leachfield Systems
- Aqua-Aerobic Systems - includes biological, filtration, aeration, mixing and membranes
- Bio-Microbics - Advanced wastewater treatment systems for decentralized homes, subdivisions, marine, and commercial properties.
- ESD Waste2Water - Industrial wastewater recycling, washwater treatment and environmental remediation.
- Front Range Precast Concrete - HOOT treatment system - Primarily AZ, CO, NM, UT, WY
- Mack Industries