Winthrop Landfill
NPL SiteWinthrop, ME
According to the EPA Superfund Enterprise Management System, Winthrop Landfill in Winthrop, ME is listed with NPL status NPL Site. Its Hazard Ranking System (HRS) score is 35.62. The public extract catalogs 12 contaminant records for this site. EPA marks construction of the cleanup remedy as complete. NPL listing is a cleanup-authority designation, not a measured health-risk score.
Superfund National Priorities List inclusion (status and HRS score shown above) 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 (CERCLA). A federal-facility classification means the site is owned or operated by a federal agency, which routes cleanup responsibility differently than a privately owned site.
"Construction Complete" (status shown above) is an EPA milestone marking that the physical remedy work is finished, not that the site has exited EPA oversight; long-term monitoring can continue afterward. Deletion from the NPL is a separate, later step the EPA takes only once it determines every planned response action is finished.
NPL listing is a cleanup-authority designation in the EPA record, not a quantitative health-risk score. HRS scores of 28.50 or above qualify a site for the NPL under the EPA screening model (toxicity, pathways, waste quantity, and affected population factors). For current site conditions and official community notices, see the EPA Regional Superfund profile and the Maine environmental agency.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| 2-BUTANONE (METHYL ETHYL KETONE) | Groundwater |
| 2-BUTANONE (METHYL ETHYL KETONE) | Soil |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Groundwater |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Soil |
| ACETONE | Groundwater |
| ACETONE | Soil |
| ARSENIC | Groundwater |
| ARSENIC | Sediment |
| TETRAHYDROFURAN | Groundwater |
| TETRAHYDROFURAN | Soil |
| TOLUENE | Groundwater |
| TOLUENE | Soil |
Location
Other Superfund Sites in Maine
| Site Name | Status | HRS Score |
|---|---|---|
| Brunswick Naval Air Station | NPL Site | 43.38 |
| Callahan Mine | NPL Site | 50.00 |
| Eastern Surplus | NPL Site | 50.00 |
| Eastland Woolen Mill | NPL Site | 70.71 |
| Keddy Mill | NPL Site | 50.00 |
| Leeds Metal | NPL Site | 32.25 |
| Loring Air Force Base | NPL Site | 34.49 |
| McKin Co. | Deleted NPL Site | 60.97 |
| O'Connor | Deleted NPL Site | 31.86 |
| Pinette's Salvage Yard | Deleted NPL Site | 33.98 |
How does this site's HRS score compare in Maine?
Of the 16 Maine Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Winthrop Landfill ranks #10 by score (35.62).
Either side of it: Brunswick Naval Air Station (43.38), Saco Tannery Waste Pits (43.19), Loring Air Force Base (34.49), Pinette's Salvage Yard (33.98)
Frequently Asked Questions
What is the Winthrop Landfill Superfund site? ▼
What does NPL listing mean for Winthrop Landfill? ▼
What is the HRS score for Winthrop Landfill? ▼
What contaminants are at the Winthrop Landfill site? ▼
What is the cleanup status of Winthrop Landfill? ▼
NPL listing is a cleanup-authority designation in the EPA record, not a quantitative health-risk score. See Superfund Sites Explained for how the National Priorities List, Hazard Ranking System, and cleanup phases work.
Read our methodology - how this data is sourced, computed, and verified.