Rocky Mountain Arsenal (USARMY)
NPL SiteAdams County, CO
According to the EPA Superfund Enterprise Management System, Rocky Mountain Arsenal (USARMY) in Adams County, CO is listed with NPL status NPL Site. Its Hazard Ranking System (HRS) score is 58.15. The public extract catalogs 298 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 Colorado environmental agency.
What is the cleanup status of this Superfund site?
NPL Status
NPL Site
Federal Facility
No
Construction Complete
No
HRS Score
58.15
Deleted from NPL
No
Contaminants
| Contaminant | Media |
|---|---|
| 1,1,1-TRICHLOROETHANE | Buildings/Structures |
| 1,1,1-TRICHLOROETHANE | Groundwater |
| 1,1,1-TRICHLOROETHANE | Liquid Waste |
| 1,1,1-TRICHLOROETHANE | Soil |
| 1,1,1-TRICHLOROETHANE | Soil Gas |
| 1,1,1-TRICHLOROETHANE | Solid Waste |
| 1,1,2,2-TETRACHLOROETHANE | Debris |
| 1,1,2,2-TETRACHLOROETHANE | Groundwater |
| 1,1,2,2-TETRACHLOROETHANE | Liquid Waste |
| 1,1,2,2-TETRACHLOROETHANE | Soil |
| 1,1,2,2-TETRACHLOROETHANE | Solid Waste |
| 1,1,2-TRICHLOROETHANE | Buildings/Structures |
| 1,1,2-TRICHLOROETHANE | Groundwater |
| 1,1,2-TRICHLOROETHANE | Liquid Waste |
| 1,1,2-TRICHLOROETHANE | Soil |
| 1,1,2-TRICHLOROETHANE | Soil Gas |
| 1,1,2-TRICHLOROETHANE | Solid Waste |
| 1,1-DICHLOROETHANE | Buildings/Structures |
| 1,1-DICHLOROETHANE | Groundwater |
| 1,1-DICHLOROETHANE | Liquid Waste |
| 1,1-DICHLOROETHANE | Soil |
| 1,1-DICHLOROETHANE | Solid Waste |
| 1,1-DICHLOROETHENE | Debris |
| 1,1-DICHLOROETHENE | Groundwater |
| 1,1-DICHLOROETHENE | Liquid Waste |
| 1,1-DICHLOROETHENE | Soil |
| 1,1-DICHLOROETHENE | Soil Gas |
| 1,1-DICHLOROETHENE | Solid Waste |
| 1,2-DIBROMO-3-CHLOROPROPANE | Buildings/Structures |
| 1,2-DIBROMO-3-CHLOROPROPANE | Debris |
| 1,2-DIBROMO-3-CHLOROPROPANE | Groundwater |
| 1,2-DIBROMO-3-CHLOROPROPANE | Sediment |
| 1,2-DIBROMO-3-CHLOROPROPANE | Soil |
| 1,2-DICHLOROBENZENE | Groundwater |
| 1,2-DICHLOROETHANE | Buildings/Structures |
| 1,2-DICHLOROETHANE | Debris |
| 1,2-DICHLOROETHANE | Groundwater |
| 1,2-DICHLOROETHANE | Liquid Waste |
| 1,2-DICHLOROETHANE | Soil |
| 1,2-DICHLOROETHANE | Solid Waste |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Groundwater |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Liquid Waste |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Soil |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Soil Gas |
| 1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) | Solid Waste |
| 1,2-DIMETHYLBENZENE (O-XYLENE) | Buildings/Structures |
| 1,3-DICHLOROBENZENE | Groundwater |
| 1,3-DIMETHYLBENZENE (M-XYLENE) | Buildings/Structures |
| 1,4-DICHLOROBENZENE | Groundwater |
| 1,4-DIMETHYLBENZENE (P-XYLENE) | Buildings/Structures |
| 1,4-DITHIANE | Liquid Waste |
| 1,4-DITHIANE | Soil |
| 1,4-DITHIANE | Solid Waste |
| 1-CHLORO-2-[(2-CHLOROETHYL)SULFANYL]ETHANE | Buildings/Structures |
| 1-CHLORO-2-[(2-CHLOROETHYL)SULFANYL]ETHANE | Liquid Waste |
| 1-CHLORO-2-[(2-CHLOROETHYL)SULFANYL]ETHANE | Soil |
| 1-CHLORO-2-[(2-CHLOROETHYL)SULFANYL]ETHANE | Solid Waste |
| 2,2-DICHLOROETHENYL DIMETHYL PHOSPHATE | Liquid Waste |
| 2,2-DICHLOROETHENYL DIMETHYL PHOSPHATE | Soil |
| 2,2-DICHLOROETHENYL DIMETHYL PHOSPHATE | Solid Waste |
| 2,5-NORBORNADIENE | Buildings/Structures |
| 2,5-NORBORNADIENE | Groundwater |
| 2-[FLUORO(METHYL)PHOSPHORYL]OXYPROPANE (SARIN) | Buildings/Structures |
| 2-[FLUORO(METHYL)PHOSPHORYL]OXYPROPANE (SARIN) | Liquid Waste |
| 2-[FLUORO(METHYL)PHOSPHORYL]OXYPROPANE (SARIN) | Soil |
| 2-[FLUORO(METHYL)PHOSPHORYL]OXYPROPANE (SARIN) | Solid Waste |
| 2-FLUOROACETIC ACID | Buildings/Structures |
| 2-FLUOROACETIC ACID | Liquid Waste |
| 2-FLUOROACETIC ACID | Soil |
| 2-FLUOROACETIC ACID | Solid Waste |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Buildings/Structures |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Liquid Waste |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Soil |
| 4-METHYL-2-PENTANONE (METHYL ISOBUTYL KETONE) | Solid Waste |
| ALDRIN | Buildings/Structures |
| ALDRIN | Groundwater |
| ALDRIN | Liquid Waste |
| ALDRIN | Sediment |
| ALDRIN | Soil |
| ALDRIN | Solid Waste |
| ARSENIC | Buildings/Structures |
| ARSENIC | Debris |
| ARSENIC | Groundwater |
| ARSENIC | Liquid Waste |
| ARSENIC | Sludge |
| ARSENIC | Soil |
| ARSENIC | Solid Waste |
| ARSENIC | Surface Water |
| ATRAZINE | Buildings/Structures |
| ATRAZINE | Groundwater |
| ATRAZINE | Liquid Waste |
| ATRAZINE | Soil |
| ATRAZINE | Solid Waste |
| BENZENE | Buildings/Structures |
| BENZENE | Debris |
| BENZENE | Groundwater |
| BENZENE | Liquid Waste |
| BENZENE | Soil |
| BENZENE | Soil Gas |
| BENZENE | Solid Waste |
| CADMIUM | Buildings/Structures |
| CADMIUM | Debris |
| CADMIUM | Groundwater |
| CADMIUM | Liquid Waste |
| CADMIUM | Sludge |
| CADMIUM | Soil |
| CADMIUM | Solid Waste |
| CALCIUM CARBONATE | Groundwater |
| CALCIUM CARBONATE | Sludge |
| CALCIUM CARBONATE | Soil |
| CALCIUM OXIDE | Groundwater |
| CALCIUM OXIDE | Sludge |
| CALCIUM OXIDE | Soil |
| CARBON TETRACHLORIDE | Buildings/Structures |
| CARBON TETRACHLORIDE | Debris |
| CARBON TETRACHLORIDE | Groundwater |
| CARBON TETRACHLORIDE | Liquid Waste |
| CARBON TETRACHLORIDE | Soil |
| CARBON TETRACHLORIDE | Solid Waste |
| CHLORDANE | Debris |
| CHLORDANE | Groundwater |
| CHLORDANE | Liquid Waste |
| CHLORDANE | Soil |
| CHLORDANE | Solid Waste |
| CHLORDANE | Surface Water |
| CHLORIDE | Groundwater |
| CHLORIDE | Surface Water |
| CHLOROACETIC ACID | Debris |
| CHLOROACETIC ACID | Groundwater |
| CHLOROACETIC ACID | Soil |
| CHLOROBENZENE | Buildings/Structures |
| CHLOROBENZENE | Debris |
| CHLOROBENZENE | Groundwater |
| CHLOROBENZENE | Liquid Waste |
| CHLOROBENZENE | Soil |
| CHLOROBENZENE | Solid Waste |
| CHLOROFORM | Buildings/Structures |
| CHLOROFORM | Debris |
| CHLOROFORM | Groundwater |
| CHLOROFORM | Liquid Waste |
| CHLOROFORM | Soil |
| CHLOROFORM | Solid Waste |
| CHLOROPHENOXY HERBICIDES | Buildings/Structures |
| CHROMIUM | Buildings/Structures |
| CHROMIUM | Debris |
| CHROMIUM | Groundwater |
| CHROMIUM | Liquid Waste |
| CHROMIUM | Sludge |
| CHROMIUM | Soil |
| CHROMIUM | Solid Waste |
| COPPER | Buildings/Structures |
| COPPER | Groundwater |
| COPPER | Liquid Waste |
| COPPER | Sludge |
| COPPER | Soil |
| COPPER | Solid Waste |
| DIBROMOCHLOROMETHANE | Liquid Waste |
| DIBROMOCHLOROMETHANE | Soil |
| DIBROMOCHLOROMETHANE | Solid Waste |
| DICHLORO-[(E)-2-CHLOROETHENYL]ARSANE (LEWISITE) | Buildings/Structures |
| DICHLOROBENZENE (MIXED ISOMERS) | Groundwater |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Buildings/Structures |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Debris |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Groundwater |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Liquid Waste |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Soil |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Solid Waste |
| DICYCLOPENTADIENE | Buildings/Structures |
| DICYCLOPENTADIENE | Debris |
| DICYCLOPENTADIENE | Groundwater |
| DICYCLOPENTADIENE | Liquid Waste |
| DICYCLOPENTADIENE | Soil |
| DICYCLOPENTADIENE | Solid Waste |
| DICYCLOPENTADIENE | Surface Water |
| DIELDRIN | Buildings/Structures |
| DIELDRIN | Debris |
| DIELDRIN | Groundwater |
| DIELDRIN | Liquid Waste |
| DIELDRIN | Sediment |
| DIELDRIN | Soil |
| DIELDRIN | Solid Waste |
| DIELDRIN | Surface Water |
| ENDRIN | Buildings/Structures |
| ENDRIN | Debris |
| ENDRIN | Groundwater |
| ENDRIN | Liquid Waste |
| ENDRIN | Sediment |
| ENDRIN | Soil |
| ENDRIN | Solid Waste |
| ETHYLBENZENE | Buildings/Structures |
| ETHYLBENZENE | Groundwater |
| ETHYLBENZENE | Liquid Waste |
| ETHYLBENZENE | Soil |
| ETHYLBENZENE | Solid Waste |
| FLUORIDE | Groundwater |
| FLUORIDE | Surface Water |
| HEXACHLOROCYCLOPENTADIENE | Buildings/Structures |
| HEXACHLOROCYCLOPENTADIENE | Debris |
| HEXACHLOROCYCLOPENTADIENE | Groundwater |
| HEXACHLOROCYCLOPENTADIENE | Liquid Waste |
| HEXACHLOROCYCLOPENTADIENE | Soil |
| HEXACHLOROCYCLOPENTADIENE | Solid Waste |
| ISODRIN | Buildings/Structures |
| ISODRIN | Debris |
| ISODRIN | Groundwater |
| ISODRIN | Liquid Waste |
| ISODRIN | Soil |
| ISODRIN | Solid Waste |
| LEAD | Buildings/Structures |
| LEAD | Debris |
| LEAD | Groundwater |
| LEAD | Liquid Waste |
| LEAD | Sludge |
| LEAD | Soil |
| LEAD | Solid Waste |
| MALATHION | Buildings/Structures |
| MALATHION | Groundwater |
| MALATHION | Liquid Waste |
| MALATHION | Soil |
| MALATHION | Solid Waste |
| MANGANESE | Groundwater |
| MERCURY | Buildings/Structures |
| MERCURY | Debris |
| MERCURY | Groundwater |
| MERCURY | Liquid Waste |
| MERCURY | Sludge |
| MERCURY | Soil |
| MERCURY | Solid Waste |
| METHYLPHOSPHONIC ACID | Groundwater |
| N-NITROSODIMETHYLAMINE | Groundwater |
| N-NITROSODIMETHYLAMINE | Liquid Waste |
| N-NITROSODIMETHYLAMINE | Soil |
| N-NITROSODIMETHYLAMINE | Solid Waste |
| NITRATE/NITRITE | Sludge |
| ORGANICS | Groundwater |
| ORGANICS | Sludge |
| ORGANICS | Soil |
| P,P'-DDD | Buildings/Structures |
| P,P'-DDE | Debris |
| P,P'-DDE | Groundwater |
| P,P'-DDE | Sediment |
| P,P'-DDE | Soil |
| P,P'-DDE | Surface Water |
| P,P'-DDT | Buildings/Structures |
| P,P'-DDT | Debris |
| P,P'-DDT | Groundwater |
| P,P'-DDT | Sediment |
| P,P'-DDT | Soil |
| P,P'-DDT | Surface Water |
| PARATHION | Buildings/Structures |
| PARATHION | Liquid Waste |
| PARATHION | Soil |
| PARATHION | Solid Waste |
| PESTICIDES | Groundwater |
| PESTICIDES | Liquid Waste |
| PESTICIDES | Sludge |
| PESTICIDES | Soil |
| PESTICIDES | Solid Waste |
| POLYCHLORINATED BIPHENYLS (PCBs) | Air |
| POLYCHLORINATED BIPHENYLS (PCBs) | Debris |
| POLYCHLORINATED BIPHENYLS (PCBs) | Soil |
| POLYCHLORINATED BIPHENYLS (PCBs) | Solid Waste |
| SULFATE | Groundwater |
| SULFATE | Surface Water |
| TETRACHLOROETHENE | Debris |
| TETRACHLOROETHENE | Groundwater |
| TETRACHLOROETHENE | Soil |
| TOLUENE | Buildings/Structures |
| TOLUENE | Debris |
| TOLUENE | Groundwater |
| TOLUENE | Liquid Waste |
| TOLUENE | Soil |
| TOLUENE | Soil Gas |
| TOLUENE | Solid Waste |
| TRANS-1,2-DICHLOROETHENE | Buildings/Structures |
| TRANS-1,2-DICHLOROETHENE | Groundwater |
| TRANS-1,2-DICHLOROETHENE | Soil |
| TRANS-1,2-DICHLOROETHENE | Soil Gas |
| TRICHLOROETHENE | Buildings/Structures |
| TRICHLOROETHENE | Debris |
| TRICHLOROETHENE | Groundwater |
| TRICHLOROETHENE | Liquid Waste |
| TRICHLOROETHENE | Soil |
| TRICHLOROETHENE | Soil Gas |
| TRICHLOROETHENE | Solid Waste |
| VOC | Free-phase NAPL |
| VOC | Groundwater |
| VX | Buildings/Structures |
| XYLENE (MIXED ISOMERS) | Groundwater |
| XYLENE (MIXED ISOMERS) | Liquid Waste |
| XYLENE (MIXED ISOMERS) | Soil |
| XYLENE (MIXED ISOMERS) | Solid Waste |
| ZINC | Buildings/Structures |
| ZINC | Groundwater |
| ZINC | Liquid Waste |
| ZINC | Sludge |
| ZINC | Soil |
| ZINC | Solid Waste |
Location
Other Superfund Sites in Colorado
| Site Name | Status | HRS Score |
|---|---|---|
| Air Force Plant PJKS | NPL Site | 42.93 |
| Bonita Peak Mining District | NPL Site | 50.00 |
| Broderick Wood Products | NPL Site | 35.13 |
| California Gulch | NPL Site | 55.84 |
| Captain Jack Mill | NPL Site | 50.56 |
| Central City, Clear Creek | NPL Site | 51.39 |
| Chemical Sales Co. | NPL Site | 37.93 |
| Colorado Smelter | NPL Site | 50.00 |
| Denver Radium Site | NPL Site | 44.11 |
| Eagle Mine | NPL Site | 47.19 |
How does this site's HRS score compare in Colorado?
Of the 24 Colorado Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Rocky Mountain Arsenal (USARMY) ranks #4 by score (58.15).
Either side of it: Sand Creek Industrial (59.65), Smeltertown Site (58.56), California Gulch (55.84), Central City, Clear Creek (51.39)
Frequently Asked Questions
What is the Rocky Mountain Arsenal (USARMY) Superfund site? ▼
Rocky Mountain Arsenal (USARMY) is one of the higher hazard-ranked Superfund sites EPA tracks in Colorado (HRS 58.15, rank #4 of 24 scored sites in the state), located in Adams County, CO. Superfund sites are contaminated locations identified by the EPA for long-term cleanup under CERCLA; a higher HRS rank reflects the EPA's scoring model, not a certified danger level.
What does NPL listing mean for Rocky Mountain Arsenal (USARMY)? ▼
According to the EPA, National Priorities List (NPL) listing designates a site for long-term federal Superfund cleanup authority. It is a programmatic status in the Superfund Enterprise Management System, not a quantitative health-risk score for nearby residents. Construction-complete status is not marked in the EPA record for this site. Site-specific conditions and community guidance are published by EPA Regional Superfund offices and the relevant state environmental agency.
What is the HRS score for Rocky Mountain Arsenal (USARMY)? ▼
Rocky Mountain Arsenal (USARMY)'s Hazard Ranking System (HRS) score is 58.15, placing it #4 of 24 Colorado Superfund sites with a scored HRS evaluation -- among the higher-scored sites in the state. Sites with a score of 28.50 or greater qualify for the NPL; the model weighs contaminant toxicity, waste quantity, release likelihood, and affected population, and is not a community health diagnosis.
What contaminants are at the Rocky Mountain Arsenal (USARMY) site? ▼
The EPA public Superfund extract catalogs 298 contaminants at Rocky Mountain Arsenal (USARMY), documented through the remedial investigation process. Counts reflect listed records in that extract, not a complete inventory of every substance ever present.
What is the cleanup status of Rocky Mountain Arsenal (USARMY)? ▼
Rocky Mountain Arsenal (USARMY) is currently NPL Site on the National Priorities List. The EPA Superfund cleanup process includes phases from preliminary assessment through post-construction completion.
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.
Related
Data sourced from the U.S. Environmental Protection Agency (EPA). See our methodology for details. Retrieved and formatted by PlainEnviro