# List of Superfund sites in Colorado

This is a list of Superfund sites in the U.S. State of Colorado designated under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) environmental law. The CERCLA federal law authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations. These locations are known as Superfund sites, and are placed on the National Priorities List (NPL).
The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation. As of May 1, 2010, there were eighteen Superfund sites on the National Priorities List in Colorado. Two more sites have been proposed for entry on the list and three others have been cleaned up and removed from it.

## Superfund sites

    Proposed for addition to National Priorities List
    Deleted from National Priorities List
| CERCLIS ID | Name | County | Reason | Proposed | Listed | Construction completed | Partially deleted | Deleted |
| CO7570090038 | Air Force Plant PJKS | Jefferson | Groundwater, surface water, soil and buildings contaminated by TCE, PCBs and NDMA. | 07/14/1989 | 11/21/1989 | – | – | – |
| COD007063530 | ASARCO, Inc. (Globe Plant) | Adams | Groundwater, surface water, sediment and soil contamination by cadmium, lead, arsenic and zinc from metals smelting and refining. | 05/10/1993 | – | – | – | – |
| COD000110254 | Broderick Wood Products | Adams | Soil, surface water and groundwater contamination by PAHs, PCP byproducts, dioxins and furans; sludge, liquid waste from a former wood treatment plant. | 09/08/1983 | 09/21/1984 | 09/30/1996 | – | – |
| COD980717938 | California Gulch | Lake | Soil, sediment, surface water and groundwater contamination by lead, arsenic other metals and acidic mine drainage, and liquid and solid waste and sludge from mining, milling and smelting. (see Leadville mining district) | 07/14/1989 | 11/21/1989 | – | 04/16/2001 07/23/2001 04/22/2002 01/12/2010 | |
| COD981551427 | Captain Jack Mill | Boulder | Solid waste, soil and surface water contamination by zinc, cadmium, copper and lead from mining and smelting. | 04/30/2003 | 09/29/2003 | – | – | – |
| COD980717557 | Central City/Clear Creek | Clear Creek | Soil, groundwater and surface water contamination, leaching and liquid waste contaminated with heavy metals such as zinc, copper, manganese, cadmium, lead and arsenic, from mining and milling operations within the watershed. (see Argo Tunnel) | 12/30/1982 | 09/08/1983 | – | – | – |
| COD007431620 | Chemical Sales Company | Denver | Liquid and solid waste, groundwater, air and soil contamination by various compounds. | 06/24/1988 | 08/30/1990 | 03/27/2000 | – | – |
| COD980716955 | Denver Radium Site | Denver | Air, soil and groundwater contamination by radium, thorium, uranium, arsenic, lead and radon gas from radium ore processing. | 12/30/1982 | 09/08/1983 | 09/27/2006 | – | – |
| COD081961518 | Eagle Mine | Eagle | Groundwater, surface water, solid waste, soil, liquid waste, debris and sediment contaminated by arsenic, cadmium, copper, lead and zinc. | 10/15/1984 | 06/10/1986 | 09/17/2001 | – | – |
| COD042167858 | Lincoln Park | Fremont | Air, groundwater, surface water, and soil are contaminated with radionuclides and metals including molybdenum, uranium, and uranium daughter products from uranium milling by Cotter Corporation. | 09/08/1983 | 09/21/1984 | – | – | – |
| COD980499248 | Lowry Landfill | Arapahoe | Liquid and solid waste, debris; soil, surface water, groundwater, sediment and leaching contaminated by chemicals, solvents and sludges; gas emissions from buried waste. | 10/08/1983 | 09/21/1984 | 09/28/2006 | – | – |
| COD980499255 | Marshall Landfill | Boulder | Surface water, ground water, soil and liquid waste contaminated by benzene, TCE, PCE, barium, iron, manganese and zinc. | 12/30/1982 | 09/08/1983 | 08/25/1993 | – | – |
| CON000802630 | Nelson Tunnel/Commodore Waste Rock | Mineral | Surface contamination and mining waste rock pile contaminated with arsenic, cadmium, lead and zinc. | 03/19/2008 | 09/03/2008 | – | – | – |
| CO7890010526 | Rocky Flats Plant (DOE) | Jefferson | Soil, surface water, groundwater and air contamination by plutonium, americium, uranium and VOCs from nearly forty years of nuclear weapons manufacturing. The plant was closed after being raided by the Federal Bureau of Investigation and EPA. | 07/14/1989 | 11/21/1989 | 09/29/2006 | 05/25/2007 | – |
| CO5210020769 | Rocky Mountain Arsenal (US Army) | Adams | Soil, surface water and groundwater contamination by aldrin, dieldrin, DBCP and arsenic from chemical weapons and pesticide manufacture. | 10/15/1984 | 07/22/1987 | – | 01/21/2003 01/15/2004 07/31/2006 | – |
| COD980717953 | Sand Creek Industrial | Adams | Soil, solid waste, liquid waste, groundwater, surface water and air contamination and debris contaminated by VOCs, pesticides, herbicides and arsenic from an oil refinery, a pesticide manufacturing facility, acid pits and a landfill. | 12/30/1982 | 09/08/1983 | 09/29/1994 | – | 12/20/1996 |
| COD983769738 | Smeltertown | Chaffee | Groundwater, soil and surface water contamination and solid waste contaminated by arsenic, cadmium, copper, lead, manganese, zinc, pentachlorophenol and creosote from smelting, wood treatment and zinc sulfate manufacture. | 02/07/1992 | – | – | – | – |
| COD980806277 | Smuggler Mountain | Pitkin | Groundwater and soil contamination by lead and cadmium from historical mining operations. | 10/15/1984 | 06/10/1986 | 09/26/1996 | – | 09/23/1999 |
| CO0002378230 | Standard mine | Gunnison | Surface water, groundwater and soil contamination by arsenic, lead, zinc, cadmium, copper, chromium and manganese from an isolated former mine at 11,000 ft altitude. | 04/27/2005 | 09/14/2005 | – | – | – |
| COD983778432 | Summitville mine | Rio Grande | Surface water, groundwater and soil contamination by copper, cadmium, manganese, zinc, lead, nickel, aluminum and iron, leaching into the Alamosa River system from an isolated former mine at 12,500 ft altitude. | 05/10/1993 | 05/31/1994 | – | – | – |
| COD007063274 | Uravan Uranium Project (Union Carbide Corp.) | Montrose | Air, groundwater, surface water, soil and sediment contamination and solid waste and debris contaminated with raffinates, raffinate crystals, lead, arsenic, cadmium and vanadium from a radium recovery plant and uranium and vanadium processing. | 10/15/1984 | 06/10/1986 | 09/29/2008 | 02/18/2005 09/04/2007 | – |
| CO0002259588 | Vasquez Boulevard and I-70 | Denver | Lead and arsenic contamination of soil, from metal smelting and/or lawncare products. | 01/19/1999 | 07/22/1999 | – | – | – |
| COD980667075 | Woodbury Chemical | Adams | Soil and debris contaminated with chlorinated pesticides, heavy metals and VOCs from former pesticide plant. | 12/30/1982 | 09/08/1983 | 03/26/1992 | – | 03/22/1993 |