Top American Water Utilities
- Metro Water District of Southern California
- New York City Dept. Environmental Protection
- Los Angeles County Sanitation District#2
- Chicago Department of Water, City of
- City of Detroit Water and Sewerage Department
- Los Angeles Water and Power
- San Diego County Water Authority
- San Francisco Public Utilities Commission
- Massachusetts Water Resources Authority
- North Jersey District Water Supply Commission
- City of Houston
- Tampa Bay Water
- Miami-Dade Water & Sewer Department
- Greater Vancouver Water District
- Dallas Water Utilities
- Santa Clara Valley Water District
- Philadelphia Water Department
- Baltimore Engineering Division
- Washington suburban Sanitary Commission
- Las Vegas Valley Water District
