# List of Superfund sites in Wisconsin

This is a list of Superfund sites in Wisconsin designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 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 March 26, 2010, there were 38 Superfund sites on the National Priorities List in Wisconsin. One additional site has been proposed for entry on the list. Six sites have been cleaned up and removed from the list.

## 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 |
| WID980610380 | Algoma Municipal Landfill | Kewaunee | Groundwater contaminated with VOCs and heavy metals. | 06/10/1986 | 07/22/1987 | 03/01/1994 | – | – |
| WIN000510210 | Amcast Industrial Corporation | Ozaukee | Past investigations at the South Property have detected the presence of polychlorinated biphenyls (PCBs) in soils below the parking lot, the railroad right-of-way east of the parking lot, the fill and subsurface soils below the former disposal area, the storm sewer system, and the shallow groundwater. | 04/09/2009 | 09/23/2009 | – | – | – |
| WISFN0507952 | Ashland/Northern States Power Lakefront | Ashland | The subsurface soil, groundwater, lake sediments and surface water are contaminated by varying concentrations of complex mixtures of organic chemicals known as polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs). | 12/01/2000 | 09/05/2002 | 12/02/2019 | – | – |
| WIT560010118 | Better Brite Plating Chrome & Zinc Shops | Brown | High concentrations of chromium, zinc, cadmium, and cyanide were detected in wastes, surface water and soil samples. During periods of high water levels, chromium-contaminated surface water collected in the backyards of adjacent residences. | 10/26/1989 | 08/30/1990 | 02/08/2000 | – | – |
| WID980610646 | City Disposal Corp. Landfill | Dane | Onsite groundwater and soil are contaminated with volatile organic compounds (VOCs). | 09/08/1983 | 09/21/1984 | 06/23/2000 | – | – |
| WID980820062 | Delavan Municipal Well#4 | Walworth | Presence of volatile organic compounds (VOCs) | 09/08/1983 | 09/21/1984 | 09/28/2000 | – | – |
| WID980820054 | Eau Claire Municipal Well Field | Eau Claire | Groundwater at the site is contaminated with VOCs, including trichloroethene, dichloroethene, and tetrachloroethene. | 09/08/1983 | 09/21/1984 | 09/28/1992 | – | 05/27/2014 |
| WID980901227 | Fadrowski Drum Disposal | Milwaukee | Groundwater contained mercury, benzene, chromium, barium, cyanide, and VOCs. Sediments from an onsite creek and ditches contained PAHs and inorganic compounds. Subsurface soil contaminated with low levels of VOCs, especially toluene. | 10/15/1984 | 06/10/1986 | 08/28/1995 | – | 09/06/2005 |
| WI0001954841 | Fox River NRDA/PCB Releases | Brown | River sediments are contaminated with PCBs. | 07/28/1998 | – | – | – | – |
| WID980610059 | Hagen Farm | Dane | Three disposal areas onsite; most of the waste in one main area (area A). Area A contained about 68,000 cubic yards of waste, including municipal refuse, paint sludges, grease, rubber, plastic sheeting, and several industrial chemicals. The major contaminants found in the waste and groundwater coming in contact with the waste were THF, benzene, ethylbenzene, toluene, xylenes, various semivolatile organic chemicals, barium, lead, and mercury. | 09/18/1985 | 07/22/1987 | 08/27/1996 | – | – |
| WID052906088 | Hechimovich Sanitary Landfill | Dodge | Groundwater in several monitoring wells downgradient of the site is contaminated with VOCs in excess of state groundwater quality standards. | 06/24/1988 | 03/31/1989 | 09/16/1997 | | |
| WID980511919 | Hunts Disposal Landfill | Racine | Contaminants of concern include organic compounds such as vinyl chloride, benzene, trichloroethene, xylene, polychlorinated biphenyls (PCBs), and various metals such as arsenic, chromium, and barium. | 06/10/1986 | 07/22/1987 | 05/07/1997 | | |
| WID000712950 | Janesville Ash Beds | Rock | Soil and groundwater are contaminated with VOCs such as tetrachlorethene, trichloroethene and dichloroethene; surface water in the Rock River contains low levels of VOCs. | 09/08/1983 | 09/21/1984 | 09/18/1997 | | |
| WID980614044 | Janesville Old Landfill | Rock | Soil and groundwater are contaminated with VOCs such as tetrachloroethene, trichloroethene and dichloroethene; surface water in the Rock River contains low levels of VOCs. | 09/08/1983 | 09/21/1984 | 09/18/1997 | | |
| WID006073225 | Kohler Co. Landfill | Sheboygan | Groundwater is contaminated with various volatile organic compounds (VOCs), heavy metals, phenols, and polycyclic aromatic hydrocarbons (PAHs). Runoff water and sediments contain heavy metals, phenols, and PAHs. Leachate samples contain VOCs and heavy metals. Waste samples from the landfill contain VOCs, phenols, PAHs, polychlorinated biphenyls (PCBs), and heavy metals. | 09/08/1983 | 09/21/1984 | 09/29/1998 | | |
| WID058735994 | Lauer I Sanitary Landfill | Waukesha | Soils and leachate are contaminated with benzene, cyanide, toluene, and zinc. | 09/08/1983 | 09/21/1984 | 09/28/1999 | | |
| WID980901243 | Lemberger Landfill, Inc. | Manitowoc | Groundwater contaminated by VOCs, including 1,1,1-trichloroethane and trichloroethylene, extends about one mile to the northwest from the site. VOCs that were present in the shallow groundwater near Lemberger Landfill have attenuated. | 09/18/1985 | 06/10/1986 | 09/09/1996 | | |
| WID056247208 | Lemberger Transport & Recycling | Manitowoc | The groundwater, underlying and extending as far as 1.5 mile downgradient from LTR is contaminated with VOCs primarily including 1,1,1-trichloroethane, 1,1-dichloroethane, 1,1-dichloroethylene, trichloroethylene, and cis-1,2-dichloroethylene. | 09/08/1983 | 09/21/1984 | 10/22/1996 | | |
| WID078934403 | Madison Metropolitan Sewerage District | Dane | The sludge in the lagoons is contaminated with polychlorinated biphenyls (PCBs) and is a potential health concern to people living near the site. | 06/24/1988 | 02/21/1990 | 09/19/2001 | – | – |
| WID980820070 | Master Disposal Service Landfill | Waukesha | The groundwater and soil were found to be contaminated with volatile organic compounds (VOCs), including benzene, toluene, xylenes, and chlorinated solvents. Inorganic contaminants included cadmium, chromium, arsenic, lead, iron, manganese, and barium. A surface water ditch which drains into the site and ultimately leads into the Fox River was found to contain cadmium levels exceeding pertinent state water quality standards. | | | | | |
| WID980823082 | Mid-State Disposal, Inc. Landfill | Marathon | Groundwater in the vicinity of the site was shown to contain volatile organic compounds (VOCs) including: vinyl chloride, tetrachloroethene, trichloroethene, and benzene. | | | | | |
| WID039052626 | Moss-American (Kerr-McGee Oil Co.) | Milwaukee | Groundwater samples showed elevated levels of volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs). Free-standing creosote or an oil sheen was observed in three monitoring well samples; similar observations were noted in eight test pits. The primary contaminants detected in the River sediments are PAHs. Contaminants that were found in the soil in the processing area and vicinity, the treated wood storage area, and the northeast and southeast landfills include components of creosote: PAHs, benzene, ethylbenzene, toluene, and xylenes (BTEX) compounds. PAHs were detected in a ditch that drains water from the site to the River. The Little Menomonee River has been affected by contaminated surface water runoff and sediments from the site. Potential health risks exist for individuals inhaling volatilized chemicals or ingesting or coming into direct contact with the contaminated sediments, soil, groundwater, or surface water. | | | | | |
| WID000713180 | Muskego Sanitary Landfill | Waukesha | Groundwater, underlying the site, is contaminated with volatile organic compounds (VOCs) and heavy metals from landfill wastes. | | | | | |
| WID083290981 | N.W. Mauthe Co., Inc. | Outagamie | Surface and subsurface soils were contaminated with VOCs, including benzene, toluene, ethylbenzene, and xylenes (BTEX), chlorinated hydrocarbons, 2-butanone, chromium, cadmium, zinc, and cyanide. Groundwater is contaminated with VOCs, SVOCs, and various inorganic compounds. | | | | | |
| WID006196174 | National Presto Industries, Inc. | Chippewa | The most environmentally significant waste that was generated was waste forge compound, which was a lubricant used in the forging of 105mm shells. The contaminants of concern were 1,1,1-trichloroethane (TCA) and trichloroethylene (TCE). Waste water discharged to Lagoon No. 1 contained significant amounts of waste forge compound, resulting in groundwater contamination. | 10/15/1984 | 06/10/1986 | 09/21/1999 | – | – |
| WID006183826 | Northern Engraving Co. | Monroe | | 09/08/1983 | 09/21/1984 | 09/29/1989 | – | 10/29/1997 |
| WID006100275 | Oconomowoc Electroplating Co. Inc. | Dodge | The groundwater, wetland and creek sediments, and subsurface soils are contaminated with heavy metals, cyanide, and volatile organic compounds (VOCs) from electroplating activities. The heavy metals include chromium, cadmium, copper, nickel, and zinc. | 09/08/1983 | 09/21/1984 | 09/25/1996 | | |
| WID000808568 | Omega Hills North Landfill | Washington | | 09/08/1983 | 09/21/1984 | 06/15/2001 | – | 12/11/1996 |
| WID980821656 | Onalaska Municipal Landfill | La Crosse | The solvents from the landfill have contaminated the groundwater beneath the site, causing the contamination of an adjacent homeowner's drinking water well that the town of Onalaska replaced in the early 1980s. A floating layer of hydrocarbons, which acts as a source of groundwater contamination, was found to be emanating from the landfill. | | | | | |
| WID006176945 | Penta Wood Products | Burnett | On-site soils and groundwater were contaminated with PCP, arsenic, copper, and zinc. Ingestion of and direct contact with the contamination prior to remedy implementation could have posed a health threat. Soil contamination also posed a threat to the animals living on and adjacent to the site. | | | | | |
| WID980610604 | Refuse Hideaway Landfill | Dane | Soils and onsite and offsite groundwater, including private wells southwest of the site, are contaminated with various volatile organic compounds (VOCs), including perchloroethene, trichloroethene, and vinyl chloride. | 02/07/1992 | 10/14/1992 | 09/30/1998 | | |
| WID980610190 | Ripon City Landfill | Fond du Lac | The remedial investigation determined that groundwater beneath and near the site was contaminated with various volatile organic compounds (VOCs), including vinyl chloride, tetrachloroethene, trichloroethene, cis-1,2-dichloroethene, and benzene at low levels. The discovery in 2001 that vinyl chloride was at unacceptable levels in wells at two homes about 1500 ft downgradient (south-southwest) of the landfill has resulted in an ongoing investigation of the extent of the contamination. | | | | | |
| WID980610141 | Sauk County Landfill | Sauk | Soil and groundwater was contaminated with VOCs. Arsenic, beryllium and polyaromatic hydrocarbons (PAHs) were detected at elevated levels in on-site soils. | | | | | |
| WID980820096 | Schmalz Dump | Calumet | Groundwater is contaminated by lead and chromium; soil, sediments, and surface water were contaminated with heavy metals and PCBs. | | | | | |
| WID046536785 | Scrap Processing Co., Inc. | Taylor | Soils and sediments are contaminated with heavy metals, including lead, barium, copper, and zinc. Elevated levels of polychlorinated biphenyls (PCBs) were also found in soil samples. | 09/08/1983 | 09/21/1984 | 02/24/2000 | – | 09/25/2020 |
| WID980996367 | Sheboygan Harbor & River | Sheboygan | Sediments are contaminated with PCBs and a wide variety of heavy metals. Soils and surface water are contaminated with PCBs and heavy metals, including arsenic, chromium, copper, lead, and zinc. | 09/18/1985 | 06/10/1986 | 01/30/2013 | – | – |
| WID980902969 | Spickler Landfill | Marathon | During the remedial investigation of the Spickler Landfill site that took place in the late 1980s, some landfill gas was detected onsite, and asbestos was confirmed to be present in a landfill cover soil sample. In addition, leachate samples from the mercury brine pit contained elevated levels of calcium (3,340,000 ppb), magnesium (2,180,000 ppb), mercury (666 ppb), and nine organic compounds. Groundwater samples from monitoring wells sampled during the remedial investigation showed exceedences of maximum contaminant level (MCL) drinking water standards for the following chemicals: benzene (8 ppb), vinyl chloride (39 ppb), barium (4,690 ppb), copper (2,250 ppb), iron (4,280 ppb), and manganese (54 ppb). | 01/22/1987 | 07/22/1987 | 09/29/1998 | | |
| WID980901219 | Stoughton City Landfill | Dane | The groundwater is contaminated with organic chemicals, including tetrahydrofuran and freon. Methane has been detected in the landfill. | 10/15/1984 | 06/10/1986 | 12/15/1998 | | |
| WID980610299 | Tomah Armory | Monroe | Presence of limited groundwater and soil contamination by volatile organic compounds (VOCs) and heavy metals. | 01/22/1987 | 07/22/1987 | 09/23/1997 | – | 02/05/2019 |
| WID980616841 | Tomah Fairgrounds | Monroe | Operated in the 1950s as an open, unlined dump. Groundwater and soil contaminated with volatile organic compounds and heavy metals. | 01/22/1987 | 07/22/1987 | 09/26/1996 | – | 08/20/2001 |
| WID980610307 | Tomah Municipal Sanitary Landfill | Monroe | In 1984, U.S. EPA inspected the site and confirmed that onsite groundwater is contaminated with heavy metals and volatile organic compounds (VOCs). | 06/10/1986 | 03/31/1989 | 10/16/2003 | – | – |
| WID980901235 | Waste Management of Wisconsin (Brookfield Sanitary Landfill) | Waukesha | The groundwater was contaminated with various volatile organic compounds (VOCs), including vinyl chloride and cyanide from site landfilling operations. | 06/24/1988 | 08/30/1990 | 06/15/2001 | – | – |
| WID990829475 | Waste Research & Reclamation Co. | Eau Claire | Reclamation and recycling business for hazardous liquid wastes, fuel blending and transportation of hazardous waste for incineration or disposal. Facility operations contaminated soil, surface water and groundwater with hazardous chemicals | 09/08/1983 | 09/21/1984 | – | – | 02/05/1993 |
| WID980993521 | Wausau Ground Water Contamination | Marathon | The groundwater and soil are contaminated with various VOCs. | 04/10/1985 | 06/10/1986 | 03/18/1994 | – | – |
| WID980610620 | Wheeler Pit | Rock | Gravel pit contaminated with paint and wastewater sludge from an auto assembly plant, as well as coal ash from power plant boilers. | 09/08/1983 | 09/21/1984 | 12/29/1992 | – | 04/20/2004 |