Frontera Creek
Deleted NPL SiteRio Abajo, PR
According to the EPA Superfund Enterprise Management System, Frontera Creek in Rio Abajo, PR is listed with NPL status Deleted NPL Site. Its Hazard Ranking System (HRS) score is 43.07. The public extract catalogs 25 contaminant records for this site. EPA marks construction of the cleanup remedy as complete. The site has been deleted from the NPL in the EPA record. 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 Puerto Rico environmental agency.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| 1,3-DIMETHYLBENZENE (M-XYLENE) | Sediment |
| 1,3-DIMETHYLBENZENE (M-XYLENE) | Surface Water |
| 2-BUTANONE (METHYL ETHYL KETONE) | Sediment |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Surface Water |
| ACETONE | Air |
| ACETONE | Sediment |
| ACETONE | Surface Water |
| ARSENIC | Soil |
| BENZOIC ACID | Surface Water |
| CADMIUM | Soil |
| CARBON DISULFIDE | Sediment |
| CHLOROMETHANE | Sediment |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Air |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Sediment |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Surface Water |
| ETHYLBENZENE | Air |
| ETHYLBENZENE | Surface Water |
| LEAD | Soil |
| MERCURY | Air |
| MERCURY | Sediment |
| MERCURY | Soil |
| MERCURY | Surface Water |
| TOLUENE | Air |
| TOLUENE | Surface Water |
| XYLENE (MIXED ISOMERS) | Air |
Location
Other Superfund Sites in Puerto Rico
| Site Name | Status | HRS Score |
|---|---|---|
| Atlantic Fleet Weapons Training Area - Vieques | NPL Site | 0.00 |
| Barceloneta Landfill | Deleted NPL Site | 41.11 |
| Cabo Rojo Ground Water Contamination | NPL Site | 50.00 |
| Cidra Ground Water Contamination | NPL Site | 50.00 |
| Corozal Well | Deleted NPL Site | 50.00 |
| Dorado Ground Water Contamination | NPL Site | 50.00 |
| Fibers Public Supply Wells | NPL Site | 35.34 |
| GE Wiring Devices | Deleted NPL Site | 31.24 |
| Hormigas Ground Water Plume | Deleted NPL Site | 50.00 |
| Juncos Landfill | NPL Site | 32.57 |
How does this site's HRS score compare in Puerto Rico?
Of the 26 Puerto Rico Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Frontera Creek ranks #15 by score (43.07).
Either side of it: Scorpio Recycling, Inc. (50.00), V&M/Albaladejo (50.00), Vega Alta Public Supply Wells (42.24), Upjohn Facility (41.92)
Frequently Asked Questions
What is the Frontera Creek Superfund site? ▼
What does NPL listing mean for Frontera Creek? ▼
What is the HRS score for Frontera Creek? ▼
What contaminants are at the Frontera Creek site? ▼
What is the cleanup status of Frontera Creek? ▼
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.