2020
- Chevron Products - El Segundo Refinery (RF)
- ExxonMobil Chemical Company - Baton Rouge Polyolefins (PC)
- Marathon Petroleum Company, LP - Illinois Refining Division (RF)
- Phillips 66 - Lake Charles Manufacturing (RF)
- Phillips 66 - Ponca City Refinery (RF)
- Phillips 66 - Santa Maria Refinery (RF)
2019
- Chevron Phillips Chemical Company LP - Borger Plant (PC)
- ExxonMobil Chemical Company - Baton Rouge Polyolefins Plant (PC)
- LyondellBasell Industries - Clinton Complex (PC)
- Marathon Petroleum Corporation - Martinez Refinery (RF)
- Phillips 66 - Bayway Refinery (RF)
- Phillips 66 - Ferndale Refinery (RF)
- Phillips 66 - Lake Charles Manufacturing Complex (RF)
- Phillips 66 - Santa Maria Refinery (RF)
- Phillips 66 - WRB Refining, LP - Borger Refinery (RF)
2018
- ExxonMobil Chemical Company - Baton Rouge Polyolefins (PC)
- ExxonMobil Chemical Company - Baytown Chemical Plant (PC)
- LyondellBasell Industries - Channelview Complex (PC)
- LyondellBasell Industries - Chocolate Bayou Polymers Facility (PC)
- LyondellBasell Industries - Clinton Complex (PC)
- Phillips 66 - Ponca City Refinery (RF)
- Shell Oil Products US - Martinez Refinery (RF)
2017
- ExxonMobil Chemical Company, Baytown Chemical Plant (PC)
- LyondellBasell Industries, Bayport Complex (PC)
- Phillips 66, Bayway Refinery (RF)
2016
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
- ExxonMobil Chemical Company, Baytown Chemical Plant (PC)
- LyondellBasell Industries-Equistar Chemicals -Lake Charles Polymers (PC)
- Phillips 66-Lake Charles Manufacturing Complex (RF)
2015
- Chevron Products Company, El Segundo Refinery (RF)
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
2014
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
2013
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
2012
- ExxonMobil Chemical Company, Baytown Chemical Plant (PC)
2011
- Phillips 66, Santa Maria Facility
- Marathon Petroleum Company LP, Michigan Refining Division
- Valero Energy Corporation, Valero Houston Refinery
2010
- LyondellBasell’s Bayport Polymers Plant
2009
- Marathon Petroleum Company’s Michigan Refining Division
- NuStar Asphalt Refining, Savannah Refinery
2008
- ConocoPhillips, Billings Refinery
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
2007
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
2006
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
2005
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
- Marathon Petroleum Company LlC, Catlettsburg, LLC (RF)
- Placid Refining Company LLC (RF)
2004
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
- ExxonMobil Chemical Company, Mont Belvieu Plastics Plant (PC)
- Valero Refining Company, Valero Wilmington Refinery (RF)
2003
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
- Flint Hills Resources, Corpus Christi Complex (RF)
2002
- ExxonMobil Chemical Company, Baton Rouge Polyolefins Plant (PC)
- Flint Hills Resources, Corpus Christi Complex (RF)
2001
- CITGO Petroleum Corporation, Lemont Refinery (RF)
- BP Chemical, Cedar Bayou Plant (PC)
2000
- Penreco, Karns City Plant (PC)
- Marathon Ashland Petroleum LLC, Louisiana Division (RF)
1999
- Chevron Chemical Company St., James Plant (PC)
- ExxonMobil Chemical Company, Baton Rouge Plastics Plant (PC)
- Fina Oil and Chemical Company, Bayport HDPE Plant (PC)
1998
- E.I. DuPont de Nemours & Company, Inc., Sabine River Works (PC)
- Exxon Chemical Company, Baton Rouge Plastics Plant (PC)
- Mobil Chemical Company, Houston Olefins Plant (PC)
1997
- Citgo Asphalt Refining Company, Savannah Refinery (RF)
- Exxon Chemical Company, Mont Belvieu Plastics Plant (PC)
- Westlake Group, Westlake Group Petrochemical Complex (Lake Charles, LA) (PC)
1996
- Placid Refining Company, Port Allen Refinery (RF)
- Chevron Chemical Company, St. James Plant (PC)
- E.I. duPont de Nemours & Company, Inc., Sabine River Works (PC)
- Exxon Chemical Company, Mont Belvieu Plastics Plant (PC)
1995
- Shell Oil Company, Anacortes Refinery (RF)
- E.I. duPont de Nemours & Co., Inc., Beaumont Works (PC)
- Exxon Chemical Company, Mont Belvieu Plastics Plant (PC)
1994
- Chevron Chemical Company, St. James Plant (PC)
- Shell Chemical Company, Taft Chemical Plant (PC)
- Shell Oil Company, Martinez Manufacturing Complex (RF)
- Shell Oil Company, Norco Manufacturing Complex (RF)
1993
- E.I. du Pont de Nemours & Co., Inc., Beaumont Works (PC)
- Quantum Chemical Company, Clinton Plant (PC)
- Shell Oil Company, Belpre Chemical Plant (PC)
- Shell Oil Company , Martinez Manufacturing Complex (RF)
1992
- E.I. du Pont de Nemours & Co., Inc., Beaumont Works (PC)
- Shell Oil Company, Anacortes Refinery (RF)
- Shell Oil Company , Martinez Manufacturing Complex (RF)
1991
- Amoco Chemical Company, Torrance Polystyrene Unit (PC)
- E.I. du Pont de Nemours & Co., Inc., Beaumont Works (PC)
- OxyChem, Victoria Operations (PC)
- Shell Oil Company, Anacortes Refinery (RF)
- Shell Oil Company, Odessa Refinery (RF)
1990
- NO RECIPIENTS
1989
- BASF Corporation Chemicals Division, Freeport Site (PC)
- E.I. duPont de Nemours & Company, Inc., Sabine River Works (PC)
- Oxy Petrochemicals Inc., Orange Plant (PC)
1988
- Conoco Inc., Santa Maria Refinery (RF)
- Shell Oil Company, Metairie Plant (RF)
- Shell Oil Company, Odessa Refinery (RF)
1987
- NO RECIPIENTS
1986
- BFGoodrich, Henry Plant (PC)
- Vista Chemical Company, Lake Charles LAB Plant (PC)
- Chevron U.S.A. Inc., Mobile Asphalt Refinery (RF)
- Kerr-McGee Refining Corporation, Wynnewood Refinery(RF)
1985
- BFGoodrich, Pedricktown Facility (PC)
- E. I. du Pont de Nemours & Co., Montague Works (PC)
- Monsanto Company, Chocolate Bayou Plant (PC)
- Exxon Company, U.S.A., Benicia Refinery (RF)
- Shell Oil Company, Metairie Plant (RF)
- Shell Oil Company, Wilmington Manufacturing Complex (RF)
1984
- Amoco Chemicals Corporation, Torrance Plant (PC)
- Exxon Chemical Americas, Baytown Olefins Plant (PC)
- Monsanto Fibers & Intermediates Co., Chocolate Bayou Plant (PC)
- Chevron U.S.A. Inc., Richmond Beach Refinery (RF)
- Shell Oil Company, Martinez Manufacturing Complex (RF)
1983
- Amoco Chemicals Corporation, Torrance Plant (PC)
- Gulf Oil Products Company, Marietta Plant (PC)
- Chevron U.S.A. Inc., Richmond Beach Refinery (RF)
- Giant Refining Company, Ciniza Refinery (RF)
1982
- Amoco Chemicals Corporation, Torrance Plant (PC)
- BFGoodrich, Plaquemine Plant (PC)
- Conoco Chemicals Company, John E. Kircher HDPE Plant (PC)
- Georgia-Pacific Corporation, Houston Division (PC)
- Hercules Incorporated, Bayport Plant (PC)
- Mobil Chemical Company, Holyoke Plant (PC)
- Shell Chemical Company, Taft Chemical Plant (PC)
- Chevron U.S.A Inc., Pascagoula Refinery (RF)
- Chevron U.S.A Inc., Richmond Beach Refinery (RF)
- Hill Petroleum Company, Krotz Springs Refinery (RF)
- Shell Oil Company, Odessa Refinery (RF)
- Witco Chemical Corporation, Lawrenceville Plant (RF)