Southington, CT
Old Southington Landfill is listed in the EPA Superfund Enterprise Management System with an NPL status of Deleted NPL Site and a Hazard Ranking System (HRS) score of 54.35. The site is located in Southington, CT. Superfund National Priorities List inclusion is the EPA's formal designation that a contaminated site qualifies for long-term federal cleanup authority under the Comprehensive Environmental Response, Compensation, and Liability Act.
EPA Superfund records catalog 100 contaminants associated with this site, documented through the remedial investigation process. Physical construction of the cleanup remedy has been completed, EPA designates this milestone as "Construction Complete." The site has been formally deleted from the NPL, indicating the EPA determined all response actions are complete.
NPL listing does not, by itself, establish a health risk to nearby residents, it triggers federal authority to investigate, score, and remediate. HRS scores of 28.50 or above qualify a site for the NPL; the ranking weighs contaminant toxicity, release pathways, waste quantity, and affected population. For current site conditions and community health guidance, contact the Connecticut environmental or health agency and the EPA Regional Superfund office listed on the official site profile.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| 1,1,1-TRICHLOROETHANE | Air |
| 1,1,1-TRICHLOROETHANE | Groundwater |
| 1,1-DICHLOROETHENE | Groundwater |
| 1,2-DICHLOROETHANE | Groundwater |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Groundwater |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Surface Water |
| 1,2-DIHYDROACENAPHTHYLENE | Sediment |
| 1,2-DIHYDROACENAPHTHYLENE | Soil |
| 1,3-DICHLOROBENZENE | Surface Water |
| 9H-FLUORENE | Sediment |
| 9H-FLUORENE | Soil |
| ACENAPHTHYLENE | Sediment |
| ACENAPHTHYLENE | Soil |
| ANTHRACENE | Sediment |
| ANTHRACENE | Soil |
| ANTIMONY | Groundwater |
| AROCLOR 1248 | Groundwater |
| AROCLOR 1254 | Groundwater |
| AROCLOR 1254 | Soil |
| AROCLOR 1260 | Groundwater |
| AROCLOR 1260 | Sediment |
| AROCLOR 1260 | Soil |
| ARSENIC | Groundwater |
| ARSENIC | Sediment |
| ARSENIC | Soil |
| BARIUM | Groundwater |
| BARIUM | Surface Water |
| BENZENE | Air |
| BENZENE | Groundwater |
| BENZO(B)FLUORANTHENE | Sediment |
| BENZO(B)FLUORANTHENE | Soil |
| BENZO(GHI)PERYLENE | Sediment |
| BENZO(GHI)PERYLENE | Soil |
| BENZO(K)FLUORANTHENE | Sediment |
| BENZO(K)FLUORANTHENE | Soil |
| BENZO[A]ANTHRACENE | Sediment |
| BENZO[A]ANTHRACENE | Soil |
| BENZO[A]PYRENE | Sediment |
| BENZO[A]PYRENE | Soil |
| BERYLLIUM | Groundwater |
| BERYLLIUM | Sediment |
| BERYLLIUM | Soil |
| BIS(2-ETHYLHEXYL)PHTHALATE | Groundwater |
| BUTYL BENZYL PHTHALATE | Groundwater |
| CADMIUM | Groundwater |
| CADMIUM | Soil |
| CARBON DISULFIDE | Groundwater |
| CARBON DISULFIDE | Surface Water |
| CARBON TETRACHLORIDE | Groundwater |
| CHLOROETHENE (VINYL CHLORIDE) | Air |
| CHLOROETHENE (VINYL CHLORIDE) | Groundwater |
| CHLOROFORM | Groundwater |
| CHROMIUM(VI) | Groundwater |
| CHROMIUM(VI) | Surface Water |
| CHRYSENE | Sediment |
| CHRYSENE | Soil |
| CIS-1,2-DICHLOROETHENE | Air |
| CIS-1,2-DICHLOROETHENE | Groundwater |
| DIBENZO(A,H)ANTHRACENE | Sediment |
| DIBENZO(A,H)ANTHRACENE | Soil |
| DIBUTYL PHTHALATE | Surface Water |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Air |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Groundwater |
| ETHYLBENZENE | Air |
| ETHYLBENZENE | Groundwater |
| FLUORANTHENE | Sediment |
| FLUORANTHENE | Soil |
| GAMMA-CHLORDANE | Groundwater |
| INDENO(1,2,3-CD)PYRENE | Sediment |
| INDENO(1,2,3-CD)PYRENE | Soil |
| LEAD | Groundwater |
| LEAD | Soil |
| MANGANESE | Groundwater |
| MANGANESE | Sediment |
| MANGANESE | Soil |
| MANGANESE | Surface Water |
| MERCURY | Groundwater |
| NAPHTHALENE | Sediment |
| NAPHTHALENE | Soil |
| NICKEL | Groundwater |
| PHENANTHRENE | Sediment |
| PHENANTHRENE | Soil |
| PYRENE | Sediment |
| PYRENE | Soil |
| SILVER | Groundwater |
| STYRENE | Air |
| TETRACHLOROETHENE | Air |
| TETRACHLOROETHENE | Groundwater |
| THALLIUM | Groundwater |
| TOLUENE | Air |
| TOLUENE | Groundwater |
| TRANS-1,2-DICHLOROETHENE | Air |
| TRICHLOROETHENE | Air |
| TRICHLOROETHENE | Groundwater |
| TRICHLOROETHENE | Surface Water |
| VANADIUM | Groundwater |
| XYLENE (MIXED ISOMERS) | Air |
| XYLENE (MIXED ISOMERS) | Groundwater |
| ZINC | Groundwater |
| ZINC | Surface Water |
Location
Other Superfund Sites in Connecticut
| Site Name | Status | HRS Score |
|---|---|---|
| Barkhamsted-New Hartford Landfill | NPL Site | 38.05 |
| Beacon Heights Landfill | NPL Site | 46.77 |
| Cheshire Ground Water Contamination | Deleted NPL Site | 35.57 |
| Durham Meadows | NPL Site | 33.94 |
| Gallup's Quarry | NPL Site | 46.29 |
| Kellogg-Deering Well Field | NPL Site | 39.92 |
| Laurel Park, Inc. | NPL Site | - |
| Linemaster Switch Corp. | NPL Site | 33.71 |
| New London Submarine Base | NPL Site | 36.53 |
| Nutmeg Valley Road | Deleted NPL Site | 42.69 |
Frequently Asked Questions
What is the Old Southington Landfill Superfund site? ▼
Is Old Southington Landfill dangerous to live near? ▼
What is the HRS score for Old Southington Landfill? ▼
What contaminants are at the Old Southington Landfill site? ▼
What is the cleanup status of Old Southington Landfill? ▼
About Superfund
The National Priorities List (NPL) is the list of sites of national priority among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States. The NPL is intended primarily to guide the EPA in determining which sites warrant further investigation.
The Hazard Ranking System (HRS) score is the principal mechanism the EPA uses to evaluate sites for placement on the NPL. Sites with an HRS score of 28.50 or greater are eligible for the NPL. Higher scores indicate greater potential risk.
The EPA's Superfund cleanup process typically follows these phases: preliminary assessment, site inspection, NPL listing, remedial investigation/feasibility study, remedy selection, remedial design/action, construction completion, post-construction completion, and NPL deletion. Some sites remain on the NPL for decades.
PlainEnviro presents this data without advocacy framing. The presence of a site on the NPL does not by itself indicate an immediate health risk to nearby residents. For site-specific health questions, consult your local environmental or health agency.
Read our methodology - how this data is sourced, computed, and verified.