Patuxent River Naval Air Station
NPL SiteSt. Mary's County, MD
According to the EPA Superfund Enterprise Management System, Patuxent River Naval Air Station in St. Mary's County, MD is listed with NPL status NPL Site. Its Hazard Ranking System (HRS) score is 50.00. The public extract catalogs 80 contaminant records for this site. 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 Maryland environmental agency.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| 1,1,2,2-TETRACHLOROETHANE | Groundwater |
| 1,1-DICHLOROETHENE | Groundwater |
| 1,2,3-TRICHLOROPROPANE | Groundwater |
| 1,2-DICHLOROETHANE | Groundwater |
| 1,3-DICHLOROBENZENE | Groundwater |
| 1,4-DICHLOROBENZENE | Groundwater |
| ALDRIN | Soil |
| ALPHA-CHLORDANE | Soil |
| ALUMINUM | Groundwater |
| ALUMINUM | Soil |
| ANTIMONY | Groundwater |
| AROCLOR 1260 | Sediment |
| AROCLOR 1260 | Soil |
| ARSENIC | Groundwater |
| ARSENIC | Soil |
| BARIUM | Groundwater |
| BENZENE | Groundwater |
| BERYLLIUM | Groundwater |
| BIS(2-ETHYLHEXYL)PHTHALATE | Groundwater |
| CADMIUM | Groundwater |
| CADMIUM | Soil |
| CALCIUM | Groundwater |
| CARBON DISULFIDE | Groundwater |
| CHLOROETHENE (VINYL CHLORIDE) | Groundwater |
| CHLOROETHENE (VINYL CHLORIDE) | Surface Water |
| CHLOROFORM | Groundwater |
| CHROMIUM | Groundwater |
| CHROMIUM | Soil |
| CIS-1,2-DICHLOROETHENE | Groundwater |
| COBALT | Groundwater |
| COPPER | Groundwater |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Groundwater |
| DIELDRIN | Groundwater |
| DIELDRIN | Soil |
| ENDRIN | Soil |
| GAMMA-CHLORDANE | Soil |
| IRON | Groundwater |
| IRON | Soil |
| IRON | Surface Water |
| LEAD | Groundwater |
| LEAD | Sediment |
| LEAD | Soil |
| LEAD | Surface Water |
| MAGNESIUM | Groundwater |
| MANGANESE | Groundwater |
| METHOXYCHLOR | Soil |
| NICKEL | Groundwater |
| P,P'-DDD | Sediment |
| P,P'-DDD | Soil |
| P,P'-DDE | Sediment |
| P,P'-DDE | Soil |
| P,P'-DDT | Sediment |
| P,P'-DDT | Soil |
| PENTACHLOROBENZENE | Soil |
| PESTICIDES | Sediment |
| PESTICIDES | Soil |
| POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) | Sediment |
| POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) | Soil |
| POTASSIUM | Groundwater |
| SELENIUM | Groundwater |
| SEMI-VOLATILE ORGANIC COMPOUNDS (SVOC) | Groundwater |
| SILVER | Groundwater |
| SILVER | Soil |
| SODIUM | Groundwater |
| TETRACHLOROETHENE | Groundwater |
| TETRACHLOROETHENE | Soil Gas |
| TETRACHLOROETHENE | Surface Water |
| THALLIUM | Groundwater |
| THALLIUM | Soil |
| TOLUENE | Groundwater |
| TRANS-1,2-DICHLOROETHENE | Groundwater |
| TRICHLOROETHANE (MIXED ISOMERS) | Groundwater |
| TRICHLOROETHENE | Groundwater |
| TRICHLOROETHENE | Surface Water |
| UNEXPLODED ORDNANCE (UXO) | Solid Waste |
| VANADIUM | Groundwater |
| VANADIUM | Soil |
| VOC | Groundwater |
| VOC | Soil Gas |
| ZINC | Groundwater |
Location
Other Superfund Sites in Maryland
| Site Name | Status | HRS Score |
|---|---|---|
| 68th Street Dump | Proposed NPL Site | 50.00 |
| Aberdeen Proving Ground (Edgewood Area) | NPL Site | 53.57 |
| Aberdeen Proving Ground (Michaelsville Landfill) | NPL Site | 31.09 |
| Andrews Air Force Base | NPL Site | 50.00 |
| Bear Creek Sediments | NPL Site | 48.02 |
| Beltsville Agricultural Research Center (USDA) | NPL Site | 50.00 |
| Brandywine DRMO | NPL Site | 50.15 |
| Bush Valley Landfill | NPL Site | 40.30 |
| Central Chemical (Hagerstown) | NPL Site | 50.00 |
| Chemical Metals Industries, Inc. | Deleted NPL Site | 0.00 |
How does this site's HRS score compare in Maryland?
Of the 26 Maryland Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Patuxent River Naval Air Station ranks #12 by score (50.00).
Either side of it: Dwyer Property Ground Water Plume (50.00), Indian Head Naval Surface Warfare Center (50.00), Sauer Dump (50.00), Fort Detrick Area B Ground Water (49.52)
Frequently Asked Questions
What is the Patuxent River Naval Air Station Superfund site? ▼
What does NPL listing mean for Patuxent River Naval Air Station? ▼
What is the HRS score for Patuxent River Naval Air Station? ▼
What contaminants are at the Patuxent River Naval Air Station site? ▼
What is the cleanup status of Patuxent River Naval Air Station? ▼
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.