Hassayampa Landfill
NPL SiteHassayampa, AZ
According to the EPA Superfund Enterprise Management System, Hassayampa Landfill in Hassayampa, AZ is listed with NPL status NPL Site. Its Hazard Ranking System (HRS) score is 42.79. The public extract catalogs 42 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 Arizona environmental agency.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| 1,1,1-TRICHLOROETHANE | Groundwater |
| 1,1,1-TRICHLOROETHANE | Soil |
| 1,1,1-TRICHLOROETHANE | Soil Gas |
| 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE | Groundwater |
| 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE | Soil |
| 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE | Soil Gas |
| 1,1-DICHLOROETHANE | Groundwater |
| 1,1-DICHLOROETHENE | Groundwater |
| 1,1-DICHLOROETHENE | Soil |
| 1,1-DICHLOROETHENE | Soil Gas |
| 1,2-DICHLOROBENZENE | Soil |
| 1,2-DICHLOROETHANE | Soil Gas |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Groundwater |
| 1,2-DICHLOROPROPANE | Groundwater |
| 1,2-DICHLOROPROPANE | Soil Gas |
| 1,4-DICHLOROBENZENE | Soil |
| 2-BUTANONE (METHYL ETHYL KETONE) | Soil Gas |
| ACETONE | Soil Gas |
| BENZENE | Soil Gas |
| CHLOROBENZENE | Soil Gas |
| CHLOROETHENE (VINYL CHLORIDE) | Groundwater |
| CHLOROETHENE (VINYL CHLORIDE) | Soil Gas |
| CHROMIUM | Soil |
| CIS-1,2-DICHLOROETHENE | Soil Gas |
| COPPER | Soil |
| DICHLORODIFLUOROMETHANE | Soil Gas |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Soil Gas |
| LEAD | Soil |
| TETRACHLOROETHENE | Groundwater |
| TETRACHLOROETHENE | Soil |
| TETRACHLOROETHENE | Soil Gas |
| TOLUENE | Groundwater |
| TOLUENE | Soil |
| TOLUENE | Soil Gas |
| TRANS-1,2-DICHLOROETHENE | Soil Gas |
| TRICHLOROETHENE | Groundwater |
| TRICHLOROETHENE | Soil Gas |
| TRICHLOROFLUOROMETHANE | Groundwater |
| TRICHLOROFLUOROMETHANE | Soil Gas |
| VOC | Soil |
| XYLENE (MIXED ISOMERS) | Soil |
| XYLENE (MIXED ISOMERS) | Soil Gas |
Location
Other Superfund Sites in Arizona
| Site Name | Status | HRS Score |
|---|---|---|
| Apache Powder Co. | NPL Site | 39.09 |
| Indian Bend Wash Area | NPL Site | 42.24 |
| Iron King Mine - Humboldt Smelter | NPL Site | 52.69 |
| Lukachukai Mountains Mining District | NPL Site | 50.00 |
| Luke Air Force Base | Deleted NPL Site | 37.93 |
| Motorola, Inc. (52nd Street Plant) | NPL Site | 40.83 |
| Mountain View Mobile Home Estates | Deleted NPL Site | 0.00 |
| Nineteenth Avenue Landfill | Deleted NPL Site | 54.27 |
| Phoenix-Goodyear Airport Area | NPL Site | 45.91 |
| Tucson International Airport Area | NPL Site | 57.80 |
How does this site's HRS score compare in Arizona?
Of the 13 Arizona Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Hassayampa Landfill ranks #6 by score (42.79).
Either side of it: Lukachukai Mountains Mining District (50.00), Phoenix-Goodyear Airport Area (45.91), Indian Bend Wash Area (42.24), Motorola, Inc. (52nd Street Plant) (40.83)
Frequently Asked Questions
What is the Hassayampa Landfill Superfund site? ▼
What does NPL listing mean for Hassayampa Landfill? ▼
What is the HRS score for Hassayampa Landfill? ▼
What contaminants are at the Hassayampa Landfill site? ▼
What is the cleanup status of Hassayampa 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.