| Year | Recipient | Principle waterway | Locale |
| 2025 | Friends of the Chicago River | Chicago River | Illinois, United States |
| 2021 | Africa Sand Dam Foundation | Thwake River | Kenya |
| 2019 | James River Association | James River | Virginia, United States |
| 2017 | San Antonio River Authority | San Antonio River | Texas, United States |
| 2016 | Buffalo Niagara Riverkeeper | Niagara River | New York, United States |
| 2015 | Lake Eyre Basin Partnership | Lake Eyre Basin | Australia |
| 2014 | International Commission for the Protection of the Rhine | River Rhine | Europe |
| 2012 | Willamette River Initiative | Willamette River | Oregon, United States |
| 2011 | Charles River Watershed Association | Charles River | Massachusetts, United States |
| 2010 | Environment Agency and Thames River Restoration Trust | River Thames | United Kingdom |
| 2009 | Lake Simcoe Region Conservation Authority | Lake Simcoe | Ontario, Canada |
| 2008 | St. Johns River Water Management District | St. Johns River | Florida, United States |
| 2007 | International Commission for the Protection of the Danube River | Danube River | Europe |
| 2006 | Foreign Affairs Office of Chengdu Municipal Government | Sha River | China |
| 2005 | Communaite de Communes du Val de Drome | Drome River | France |
| 2004 | Siuslaw Institute | Siuslaw River Basin | Oregon, United States |
| 2003 | Alexander River Restoration Administration | Nahal Alexander | Israel |
| 2002 | Mekong River Commission | Mekong River | Southeast Asia |
| 2001 | Blackwood Basin Group | Blackwood River | Australia |
| 2000 | Grand River Conservation Authority | Grand River | Ontario, Canada |
| 1999 | Mersey Basin Campaign | Mersey Basin | United Kingdom |