New London County, CT
The federal environmental record for New London County: what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
10
federal cleanup sites
5
PFAS-detecting water systems
10
TRI facilities
79
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| New London Submarine Base | New London | on the NPL | 08/30/1990 |
Drinking water: PFAS testing
Public water systems serving New London with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| COLCHESTER SEWER & WATER COMMISSION CT0280011 | PFOS: 9 ng/L PFHxS: 3.6 ng/L | above final limit |
| EAST LYME WATER & SEWER COMMISSION CT0450011 | PFOA: 9.2 ng/L PFOS: 7.2 ng/L PFPeA: 5.6 ng/L | above final limit |
| NORWICH PUBLIC UTILITIES CT1040011 | PFOS: 16.2 ng/L PFHxS: 12.5 ng/L PFOA: 6.7 ng/L | above final limit |
| JEWETT CITY WATER COMPANY CT0580011 | PFBA: 12.1 ng/L | detected |
| AQUARION WATER CO OF CT-MYSTIC CT1370011 | PFBS: 4 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
10 facilities in New London filed TRI reports for 2024, totalling 24k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| ELECTRIC BOAT CORP | GROTON | Diisocyanates, Nickel | 10k lb |
| AMERICAS STYRENICS ALLYNS POINT PLANT | GALES FERRY | Styrene, Ethylbenzene | 10k lb |
| SHEFFIELD PHARMACEUTICALS LLC | NEW LONDON | Zinc compounds | 2k lb |
| PCC STRUCTURALS | GROTON | 4,4'-Isopropylidenediphenol, Nickel | 1k lb |
| NALAS ENGINEERING SERVICES INC | NORWICH | Methanol | 476 lb |
| DONCASTERS INC PRECISION CASTINGS NEW ENGLAND | GROTON | Cobalt, Nickel | 50 lb |
| US DOD-NAVAL SUBMARINE BASE NEW LONDON | GROTON | Lead | 29 lb |
| THE EMBALMERS' SUPPLY CO | EAST LYME | - | 0 lb |
| MONTVILLE POWER LLC | UNCASVILLE | Polycyclic aromatic compounds | 0 lb |
| TILCON CONNECTICUT INC. | GROTON | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 825 tank facilities in New London: 503 tanks in service and 2,575 closed. 202 fuel releases are on record, of which 79 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps New London as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for New London, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- 1109TH AVIATION CLASSIFICATION & REPAIR DEPOTGROTON
- AMGRAPH PACKAGINGSPRAGUE
- MS CHAMBERS & SONBALTIC
- NATIONAL GUARD STONE'S RANCH MILITARY RESERVATIONEAST LYME
- NAVAL UNDERWATER SYSTEMS CENTEREAST LYME
- NAVAL UNDERWTR SYSTEMS CENTER/LABNEW LONDON
- NEW LONDON TEXTILE PRINTWATERFORD
- TILCON CT ASPHALT STONE READY MIXGROTON
- U.S. NAVAL SUBMARINE BASE NEW LONDON (SUBASENLON)GROTON
- US COAST GUARD ACADEMYNEW LONDON