- L&T Hydrocarbon
- National Fuel
- Rutila Resources (BBI Group)
- Blattner Energy
- Colorado Springs Utilities
- County of Kaua'i Department of Water
- Endeavour Energy
- Energy Metrics
- Lake Oswego –Tigard Water Partnership
- Orange County Sanitation District
- Passaic Valley Water Reclamation
- Proger SPA
- Sacramento County Wastewater
- San Diego Gas & Electric
