Cost So Far
$1.89M
Money already spent on the evaluation and cleanup of hazardous sites.
Expected Additional Cost
$12.7M
The estimated amount of money needed for evaluation and cleanup of hazardous sites at this installation.
Expected Completion Date
2031
The date by which the DOD estimates cleanup of all sites will be complete. Long term monitoring may continue after this date.
The former Hingham Naval Ammunition Depot is compromised for approximately 990.3 acres located in Hingham, MA. The Navy used the Hingham Naval Ammunition Depot as a munitions manufacturing and testing plant to supply munitions to ships and... see more » The former Hingham Naval Ammunition Depot is compromised for approximately 990.3 acres located in Hingham, MA. The Navy used the Hingham Naval Ammunition Depot as a munitions manufacturing and testing plant to supply munitions to ships and aircraft primarily during the preparation and engagement of World Wars I and II. Construction of the buildings and other improvements began in 1909. By 1958 the depot contained 187 buildings; including warehouses, personnel housing, and munitions production facilities. The site for Hingham NAD was acquired in 1906 and initially completed in 1913, although ammunition was first received in 1911. The depot was in use for World Wars I and II for both munitions manufacturing and disposal operations. Peacetime operations were similar and included the manufacturing of practice ammunition for the fleet, overhaul of service ammunition, and maintenance and demilitarization of unserviceable ammunition. The depot was operational until 1961. The majority of the former depot has been developed as a publicly accessible park surrounded by mixed residential and commercial properties. (Source: U.S. Army Corps of Engineers) « see less
10 Hazardous Sites
Below are the locations of hazardous sites associated with this military installation, according to the DOD. A site’s contamination may affect a much larger area, including public and private lands and the water supplies beneath them.
High Risk
Medium Risk
Low Risk
Risk Not Evaluated or Not Required
Response Complete
We haven't independently confirmed the location of every site. If you notice a site placed at the incorrect location, please contact us.
Not all sites in the DOD data include location information, so there may be sites listed below that are missing from the map. The risk level of a site refers to a relative risk assessment made by the DOD to prioritize the cleanup of sites.
6 Active Sites
Sites where military cleanup actions are still ongoing. The risk level of a site refers to a relative risk assessment made by the DOD, which prioritizes the cleanup of sites that pose greatest threat to safety, human health, and the environment.
Site ID: 08OEW
WEYMOUTH BACK RIVER
Unexploded Munitions and Ordnance Area
Cost
$2.52M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2031
This site is under ongoing monitoring until Sep 2061
Site ID: 05OEW
DUMP AREA
Mixed Waste Area
Cost
$1.57M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2023
This site is under ongoing monitoring until Sep 2053
Site ID: 06OEW
SOUTH PIER
Unexploded Munitions and Ordnance Area
Cost
$2.33M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2027
This site is under ongoing monitoring until Sep 2057
Contaminated Areas
Sediment (Ecological): Medium Risk
Contaminants: Mercury 1.1 mg/kg Nickel 26.8 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 110.0 mg/kg Barium 115.0 mg/kg Copper 157.0 mg/kg Lead 168.0 mg/kg Zinc 361.0 mg/kg Manganese 383.0 mg/kg
Sediment (Human): Low Risk
Contaminants: Mercury and compounds 1.1 mg/kg Nickel 26.8 mg/kg Strontium 53.0 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 110.0 mg/kg Barium 115.0 mg/kg Copper 157.0 mg/kg Lead 168.0 mg/kg Zinc 361.0 mg/kg Manganese 383.0 mg/kg
Site ID: 07OEW
FURNACE AREA
Unexploded Munitions and Ordnance Area
Cost
$2.32M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2029
This site is under ongoing monitoring until Sep 2059
Contaminated Areas
Sediment (Ecological): High Risk
Contaminants: Nitrobenzene 0.058 mg/kg Mercury 0.95 mg/kg Nickel 48.8 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 166.0 mg/kg Antimony 182.0 mg/kg Barium 365.0 mg/kg Manganese 1160.0 mg/kg Zinc 6880.0 mg/kg Aluminum 21800.0 mg/kg Lead 27400.0 mg/kg Copper 95700.0 mg/kg
Sediment (Human): High Risk
Contaminants: Nitrobenzene 0.058 mg/kg Mercury and compounds 0.95 mg/kg Nickel 48.8 mg/kg Strontium 71.3 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 166.0 mg/kg Antimony 182.0 mg/kg Barium 365.0 mg/kg Manganese 1160.0 mg/kg Zinc 6880.0 mg/kg Aluminum 21800.0 mg/kg Lead 27400.0 mg/kg Copper 95700.0 mg/kg
Soil: Medium Risk
Contaminants: Antimony 7.2 mg/kg Nickel 37.6 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 41.1 mg/kg Strontium 56.7 mg/kg Barium 179.0 mg/kg Copper 389.0 mg/kg Zinc 607.0 mg/kg Manganese 1500.0 mg/kg Lead 7860.0 mg/kg
Groundwater: Low Risk
Contaminants: Antimony 0.4 ug/L Nickel 1.3 ug/L Copper 3.1 ug/L Zinc 7.0 ug/L Barium 28.1 ug/L Manganese 455.0 ug/L Strontium 3470.0 ug/L
Site ID: 09OEW
BURIAL AREA
Munitions Burial
Cost
$2.33M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2030
This site is under ongoing monitoring until Sep 2060
Contaminated Areas
Sediment (Ecological): Medium Risk
Contaminants: 2,4-Dinitrotoluene 0.86 mg/kg
Sediment (Human): Low Risk
Contaminants: 2,4-Dinitrotoluene 0.86 mg/kg
Site ID: 04OEW
NORTH PIER
Unexploded Munitions and Ordnance Area
Cost
$1.66M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2028
This site is under ongoing monitoring until Sep 2058
Contaminated Areas
Sediment (Ecological): Low Risk
Contaminants: Nitrobenzene 0.28 mg/kg HMX 0.63 mg/kg
Sediment (Human): Low Risk
Contaminants: Nitrobenzene 0.28 mg/kg HMX 0.63 mg/kg
4 Inactive Sites
Sites where military cleanup actions are complete, according to the DOD. Note that this status does not necessarily mean the site is no longer hazardous, as many of these sites are put under long-term monitoring or other restrictions.
Site ID: 01CON/HTRW
TOWN PROP 1 DRUM, 1 TRAN
Above Ground Storage Tank
Cost
Unknown
Final Cleanup Action
Sep 1997
Site ID: 02BD/DR
HOLES, BUNKRS, BLDGS, DO
Building Demolition/Debris Removal
Cost
Unknown
Final Cleanup Action
Sep 2001
Site ID: 03CON/HTRW
SCHOOL PROPERTY
Underground Storage Tanks
Cost
Unknown
Final Cleanup Action
Sep 1995
Site ID: 00HTRW
HINGHAM NAVAL AMMO DEPOT
Soil Contamination After Tank Removal
Cost
Unknown
Final Cleanup Action
Sep 1992
Contaminated Areas
Sediment (Fresh): Risk Not Evaluated
Update (Dec. 5, 2017): We have changed the source of the installation cost data after being notified by the Department of Defense that they erroneously reported their own cost figures on the DERP website. We are now displaying the costs the department says are the most accurate available, from the Pentagon’s DERP database that we received in a FOIA request.
Note: The risk level of a site refers to a relative risk assessment made by the DOD to prioritize the cleanup of sites.
Data: All data comes from the Defense Environmental Restoration Program and the U.S. Army Corps of Engineers, and will be released soon at the ProPublica Data Store. Read our methodology »