New Castle, DE
Halby Chemical Co. is listed in the EPA Superfund Enterprise Management System with an NPL status of NPL Site and a Hazard Ranking System (HRS) score of 30.90. The site is located in New Castle, DE. 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 27 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 Delaware 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-DICHLOROETHANE | Groundwater |
| 1,1-DICHLOROETHENE | Groundwater |
| AMMONIA | Groundwater |
| ANTIMONY | Groundwater |
| ANTIMONY | Soil |
| ARSENIC | Groundwater |
| ARSENIC | Sediment |
| ARSENIC | Soil |
| BENZO(B)FLUORANTHENE | Soil |
| BENZO(K)FLUORANTHENE | Soil |
| BENZO[A]ANTHRACENE | Soil |
| BENZO[A]PYRENE | Soil |
| BERYLLIUM | Groundwater |
| CADMIUM | Groundwater |
| CARBON DISULFIDE | Groundwater |
| CARBON DISULFIDE | Soil |
| CHLOROETHENE (VINYL CHLORIDE) | Groundwater |
| CHROMIUM | Soil |
| CHRYSENE | Soil |
| COBALT | Groundwater |
| MANGANESE | Groundwater |
| NICKEL | Groundwater |
| PYRENE | Soil |
| THALLIUM | Groundwater |
| TOLUENE | Groundwater |
| VANADIUM | Groundwater |
| ZINC | Groundwater |
Location
Other Superfund Sites in Delaware
| Site Name | Status | HRS Score |
|---|---|---|
| Army Creek Landfill | NPL Site | 69.92 |
| Blades Groundwater | NPL Site | 50.00 |
| Chem-Solv, Inc. | Deleted NPL Site | 37.93 |
| Coker's Sanitation Service Landfills | Deleted NPL Site | 52.15 |
| Delaware City PVC Plant | NPL Site | 30.55 |
| Delaware Sand & Gravel Landfill | NPL Site | 46.60 |
| Dover Air Force Base | NPL Site | 35.89 |
| Dover Gas Light Co. | NPL Site | 35.57 |
| E.I. du Pont de Nemours & Co., Inc. (Newport Pigment Plant Landfill) | NPL Site | 51.91 |
| East Basin Road Groundwater | NPL Site | 50.00 |
Frequently Asked Questions
What is the Halby Chemical Co. Superfund site? ▼
Is Halby Chemical Co. dangerous to live near? ▼
What is the HRS score for Halby Chemical Co.? ▼
What contaminants are at the Halby Chemical Co. site? ▼
What is the cleanup status of Halby Chemical Co.? ▼
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.