EPA TRI Facility · Transportation Equipment
Electric Boat Corp
Groton, CT · Parent: General Dynamics Corp
- Total releases
- 166.3K lbs
- Chemicals reported
- 9
- Carcinogens
- 2
- Primary pathway
- Off-site Transfers
OFFSITE Form-R mix
Electric Boat Corp: how the 176.4K lbs splits
176.4K lbs across all reported pathways
- Off-site Transfers 175.9K lbs 99.7%
- Water Discharges 318 lbs 0.2%
- Air Releases 181 lbs 0.1%
- Land Disposal 0 lbs <0.1%
Electric Boat Corp's 176.4K lbs Form-R total is OFFSITE - off-site transfers is 99.7% of the bar. Next segment: water discharges at 0.2%. Leading chemical by pounds: Diisocyanates.
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
MID volume OFFSITE pathway CARC-MID
Electric Boat Corp is an EPA Toxics Release Inventory reporter in Groton, CT, in the transportation equipment sector. It reported 10.1K lbs of releases across 6 chemicals in 2024, and 166.3K lbs in total across its 2019-2024 reporting years. That ranks 3,559 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Connecticut's 240 reporting TRI sites, pounds #1 is not chemical-count #1. Electric Boat Corp is pounds #15 and chemical-count #13 at 166.3K lbs. Clean Harbors of Connecticut Inc leads reported pounds (1.5M lbs) at 15 chemicals (chemical-count #2). Allnex USA Inc. Wallingford Ct Site leads chemical count at 19 chemicals (436.7K lbs, pounds #3). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Doncasters Inc Precision Castings New England; Pcc Structurals; Sheffield Pharmaceuticals LLC; US Coast Guard Academy. Similar-scale Transportation Equipment peers outside Connecticut: Vectorworks Marine LLC; Plasman Sc Inc.; Allegany Ballistics Lab (nirop); Hitachi Astemo Americas Inc. - Berea Ky. Other General Dynamics Corp sites in this extract: General Dynamics (nassco); General Dynamics Electric Boat Corp; Bath Iron Works-Structural Fabrication Facility (formerly Ha; St. Marks Powder Inc.. Largest disclosed chemicals by pounds: Diisocyanates; Lead; Nickel; Chromium compounds (except for chromite ore mined in the Transvaal Region).
Electric Boat Corp stamps MID volume with a dominant OFFSITE pathway (99.7% off-site transfers) across 9 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 166.3K lbs (2019–2024). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Vectorworks Marine LLC and Plasman Sc Inc..
Electric Boat Corp vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
166K lbs Top 14% higher than 86% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Electric Boat Corp inside New London's TRI pounds
Among the 1,603 Transportation Equipment facilities in this database, Electric Boat Corp reports the 206th-largest volume, placing it in the top 12.9% of its sector. This one site accounts for 54.3% of every pound reported in New London. Its reported volume is concentrated rather than spread: Diisocyanates alone is 69.7% of the total. Scale peers outside Connecticut include Vectorworks Marine LLC and Plasman Sc Inc..
County-dominant here means ≥25% of New London's reported pounds (306.5K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Electric Boat Corp's total reported releases fell from 19.7 thousand lb in 2022 to 11.0 thousand lb in 2023, based on EPA TRI filings.
- Electric Boat Corp's water releases fell from 68 lb in 2022 to 32 lb in 2023, based on EPA TRI filings.
- Electric Boat Corp's off-site transfers fell from 19.6 thousand lb in 2022 to 10.9 thousand lb in 2023, based on EPA TRI filings.
Electric Boat Corp Form-R facts
Compare this facility
See how Electric Boat Corp stacks up against nearby facilities and the typical reporter.
60.5× more than the comparison
3.0× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Electric Boat Corp releases toxic chemicals into the environment. Total: 176.4K lbs.
Emissions Trend Summary
From 2019 to 2024, total releases decreased by 47% (18.9K lbs to 10.1K lbs).
Electric Boat Corp: annual Form-R pounds
MID site · OFFSITE pathway · TRI years 2019–2024
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
- 2024 0
What this shows Electric Boat Corp year-over-year reported totals (decreased by 47% from 2019 to 2024). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Diisocyanates.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 18.9K lbs | 6 |
| 2020 | 50.6K lbs | 6 |
| 2021 | 66.1K lbs | 6 |
| 2022 | 19.7K lbs | 6 |
| 2023 | 11.0K lbs | 6 |
| 2024 | 10.1K lbs | 6 |
Chemical Releases
Aggregated across all reporting years (2019–2024). 2 of 9 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Diisocyanates | 122.9K lbs | - |
| Lead | 36.3K lbs | Carcinogen |
| Nickel | 11.9K lbs | Carcinogen |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 3.3K lbs | - |
| Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 1.5K lbs | - |
| Copper compounds | 258 lbs | - |
| Copper And Copper Compounds | 122 lbs | - |
| Manganese compounds | 86 lbs | - |
| Manganese And Manganese Compounds | 23 lbs | - |
Electric Boat Corp · OFFSITE-pathway site
Nearest TRI Facilities to Electric Boat Corp
Closest other reporters in Connecticut - including Doncasters Inc Precision Castings New England, Pcc Structurals, Sheffield Pharmaceuticals LLC, ordered by distance.
Showing 8 of 239 other reporting facilities in Connecticut.
Similar Transportation Equipment Facilities
Other Transportation Equipment facilities with similar total release volumes (±80%), outside Connecticut - e.g. Vectorworks Marine LLC, Plasman Sc Inc., Allegany Ballistics Lab (nirop).
Compare beyond Connecticut
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Electric Boat Corp on cumulative reported pounds (166.3K lbs) and distinct chemical count (9). Release-pound peers include Am Stabilizers Corp, Clearstream Wastewater Systems Inc, Vectorworks Marine LLC. Chemical-count peers include Viatris Pharmaceuticals LLC, Prepa - San Juan Steam Plant, Solutia Inc. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
- Am Stabilizers Corp Valparaiso, IN · Chemicals 166.3K lbs reported
- Clearstream Wastewater Systems Inc Silsbee, TX · Plastics and Rubber 166.4K lbs reported
- Vectorworks Marine LLC Titusville, FL · Transportation Equipment 166.4K lbs reported
- Marlam Industries Inc. Phoenix, AZ · Plastics and Rubber 166.4K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Viatris Pharmaceuticals LLC Barceloneta, PR · Chemicals 9 chemicals
- Prepa - San Juan Steam Plant Puerto Nuevo, PR · Electric Utilities 9 chemicals
- Solutia Inc Springfield, MA · Plastics and Rubber 9 chemicals
- O'Connell Oil Co Merrill Road Facility Pittsfield, MA · Petroleum Bulk Terminals 9 chemicals
Other General Dynamics Corp Facilities
Same-parent TRI sites ranked by reported releases - including General Dynamics (nassco), General Dynamics Electric Boat Corp, Bath Iron Works-Structural Fabrication Facility (formerly Ha.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Diisocyanates, Lead, Nickel, Chromium compounds (except for chromite ore mined in the Transvaal Region); nearby reporters include Doncasters Inc Precision Castings New England. Electric Boat Corp stamps MID volume · OFFSITE pathway · CARC-MID carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Electric Boat Corp TRI extract (MID · OFFSITE · CARC-MID · lead Diisocyanates) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Electric Boat Corp totals are self-reported EPCRA §313 estimates for Groton, CT, latest year 2023. Form-R rows span 2019–2024 (6 years). NAICS 336611 · Transportation Equipment. 54.3% of New London TRI pounds in this extract. Nearest ABS peer: Am Stabilizers Corp (Δ 82 lbs). Pounds ≠ exposure.
Electric Boat Corp stamps MID volume · OFFSITE pathway · CARC-MID · lead Diisocyanates. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov