Nashua, NH
Sylvester is listed in the EPA Superfund Enterprise Management System with an NPL status of NPL Site. The site is located in Nashua, NH. 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 30 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."
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 New Hampshire 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 | Groundwater |
| 1,1,2-TRICHLOROETHANE | Groundwater |
| 1,1-DICHLOROETHANE | Groundwater |
| 1,2-DICHLOROETHANE | Groundwater |
| 2-BUTANONE (METHYL ETHYL KETONE) | Groundwater |
| 2-PROPANOL | Groundwater |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Groundwater |
| ACETONE | Groundwater |
| ARSENIC | Groundwater |
| BENZENE | Groundwater |
| CHLOROBENZENE | Groundwater |
| CHLOROETHANE | Groundwater |
| CHLOROETHENE (VINYL CHLORIDE) | Groundwater |
| CHLOROFORM | Groundwater |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Groundwater |
| DIMETHYL SULFIDE | Groundwater |
| ETHYLBENZENE | Groundwater |
| INORGANICS | Groundwater |
| INORGANICS | Soil |
| METALS | Groundwater |
| METALS | Soil |
| METHYL 2-METHYLPROP-2-ENOATE | Groundwater |
| METHYL ACETATE | Groundwater |
| TETRACHLOROETHENE | Groundwater |
| TETRAHYDROFURAN | Groundwater |
| TOLUENE | Groundwater |
| TRICHLOROETHENE | Groundwater |
| VOC | Groundwater |
| VOC | Soil |
| XYLENE (MIXED ISOMERS) | Groundwater |
Location
Other Superfund Sites in New Hampshire
| Site Name | Status | HRS Score |
|---|---|---|
| Auburn Road Landfill | NPL Site | 36.30 |
| Beede Waste Oil | NPL Site | 70.71 |
| Chlor-Alkali Facility (Former) | NPL Site | 30.54 |
| Coakley Landfill | NPL Site | 29.16 |
| Collins & Aikman Plant (Former) | NPL Site | 50.00 |
| Dover Municipal Landfill | NPL Site | 36.98 |
| Fletcher's Paint Works & Storage | NPL Site | 35.39 |
| Kearsarge Metallurgical Corp. | NPL Site | 38.45 |
| Keefe Environmental Services | NPL Site | 65.19 |
| Mohawk Tannery | Proposed NPL Site | 52.40 |
Frequently Asked Questions
What is the Sylvester Superfund site? ▼
Is Sylvester dangerous to live near? ▼
What is the HRS score for Sylvester? ▼
What contaminants are at the Sylvester site? ▼
What is the cleanup status of Sylvester? ▼
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.