Adams County, CO
Rocky Mountain Arsenal (USARMY) is listed in the EPA Superfund Enterprise Management System with an NPL status of NPL Site and a Hazard Ranking System (HRS) score of 58.15. The site is located in Adams County, CO. Superfund National Priorities List inclusion 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.
EPA Superfund records catalog 298 contaminants associated with this site, documented through the remedial investigation process. Construction of the cleanup remedy has not yet been designated as complete in the EPA record.
NPL listing does not, by itself, establish a health risk to nearby residents, it triggers federal authority to investigate, score, and remediate. HRS scores of 28.50 or above qualify a site for the NPL; the ranking weighs contaminant toxicity, release pathways, waste quantity, and affected population. For current site conditions and community health guidance, contact the Colorado environmental or health agency and the EPA Regional Superfund office listed on the official site profile.
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 |
Frequently Asked Questions
What is the Rocky Mountain Arsenal (USARMY) Superfund site? ▼
Rocky Mountain Arsenal (USARMY) is an active National Priorities List (NPL) Superfund site located in Adams County, CO. It has a Hazard Ranking System (HRS) score of 58.15. Superfund sites are contaminated locations identified by the EPA for long-term cleanup.
Is Rocky Mountain Arsenal (USARMY) dangerous to live near? ▼
The presence of a site on the EPA National Priorities List does not by itself indicate an immediate health risk to nearby residents. EPA evaluates sites through a comprehensive process including remedial investigation and risk assessment. Cleanup activities may still be ongoing. For site-specific health questions, contact your state environmental or health agency.
What is the HRS score for Rocky Mountain Arsenal (USARMY)? ▼
Rocky Mountain Arsenal (USARMY) has a Hazard Ranking System (HRS) score of 58.15. The HRS is the EPA's principal mechanism for evaluating Superfund sites, scores of 28.50 or greater qualify for the NPL. Higher scores indicate greater potential risk based on toxicity, waste quantity, release likelihood, and affected population.
What contaminants are at the Rocky Mountain Arsenal (USARMY) site? ▼
The EPA has identified 298 contaminants at Rocky Mountain Arsenal (USARMY). Contaminant data is maintained in the EPA's Superfund database and is based on site investigations conducted during the remedial process.
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.
About Superfund
The National Priorities List (NPL) is the list of sites of national priority among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States. The NPL is intended primarily to guide the EPA in determining which sites warrant further investigation.
The Hazard Ranking System (HRS) score is the principal mechanism the EPA uses to evaluate sites for placement on the NPL. Sites with an HRS score of 28.50 or greater are eligible for the NPL. Higher scores indicate greater potential risk.
The EPA's Superfund cleanup process typically follows these phases: preliminary assessment, site inspection, NPL listing, remedial investigation/feasibility study, remedy selection, remedial design/action, construction completion, post-construction completion, and NPL deletion. Some sites remain on the NPL for decades.
PlainEnviro presents this data without advocacy framing. The presence of a site on the NPL does not by itself indicate an immediate health risk to nearby residents. For site-specific health questions, consult your local environmental or health agency.
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 Editorial