| YEAR | PRIMARY PARTICIPANTS | PROJECT NAME |
| 2019 | City of Paso Robles Wastewater Treatment Plant | Tertiary Treatment Facilities Project and Nutrient Harvesting System |
| 2018 | Central Marin Sanitation Agency | |
| 2017 | Los Angeles Bureau of Sanitation | City of Los Angeles/LASAN/Terminal Island Water Reclamation Plant |
| 2016 | City of Hayward | Cogeneration Facility |
| 2015 | Santa Margarita Water District | Gobernadora Multipurpose Basin |
| 2014 | Board of Directors | West Basin Municipal Water District |
| 2013 | Bill Moorhead & Zakir Hirani | City of Anaheim Water Recycling Demonstration Project |
| 2012 | Orange County Sanitation District | Ocean Outfall Land Section and Ocean Outfall Booster Pump Station Piping Rehabilitation Project |
| 2011 | City of Roseville | Dry Creek Levee Relocation |
| 2010 | Sacramento Area Sewer District | Central Trunk Sewer Rehabilitation Project |
| 2009 | Orange County Sanitation District | Steve Anderson Lift Station (Project 1-10) |
| 2008 | Los Angeles County Sanitation District | Antelope Valley Water Reuse |
| 2007 | Sanitation Districts of Los Angeles County | Nitrification/Denitrification Facilities at the Los Coyotes Water Reclamation Plant |
| 2006 | Irvine Ranch Water District | IRWD Nanofiltration Facility Approaching Zero Liquid Discharge |
| 2005 | City of Redlands & CH2M Hill | Water Recycling Membrane Bioreactor Project |
| 2004 | Ventura Regional Sanitation District | Saticoy Sanitary District Water Collection and Treatment Improvements |
| 2003 | Irvine Ranch WD; Tetra Tech, Inc; & Pascal and Ludwig Constructors | Deep Aquifier Treatment System (DATS) |
| 2002 | Sanitation Districts of Los Angeles | Full Secondary Treatment Facilities at the Joint Water Pollution Control Plant |
| 2001 | East Bay MUD, Black & Veatch, GSE Construction, and Calgon Carbon Company | Main Wastewater Treatment Plant Influent Pump Station Odor Control |
| 2000 | SHN Consulting and Geologists, Inc. | Reliable Equipment Company Dual Phase Extraction Project |
| 1999 | Orange County Sanitation District | OCSD Peak Flow Management Plan |
| 1999 | City of San Diego, Metropolitan Wastewater Department; International Boundary & Water Commission; and Parsons Engineering Science | South Bay Ocean Outfall |
| 1999 | Cargill Salt Land Department and Wetlands Research Associates | Newark Coyote Wetland Consolidation and Storm Water Filtering System |
| 1996 | San Jose/Santa Clara WPCP | South Bay Water Recycling |
| 1995 | Black and Veatch; Daniel, Mann, Johnson & Mendenhall; and City of Los Angeles Public Works Department | Hyperion Secondary Treatment Facilities |
| 1994 | Carmel Area Wastewater District; Pebble Beach CSD; Monterey Peninsula Water Management District; Pebble Beach Company; and Parsons Engineering Science, Inc. | CAWD/PBCSD Wastewater Reclamation Project |
| 1993 | John Carollo Engineers and Riverside Water Quality Control Plant | Riverside Water Quality Control Plant No. 2, Aeration Modifications |
| 1992 | Sacramento Regional County Sanitation District and John Carollo Engineers | Sacramento Regional WWTP Master Plan |
| 1991 | John Carollo Engineers | Solids Storage and Truck Loading Facility at Reclamation Plant No. 1, County Sanitation Districts of Orange County |