Electric Boat Corp – Emissions Trend
Groton, CT · 2019–2024 · Parent: General Dynamics Corp
This page assembles 6 consecutive years of EPA Toxics Release Inventory Form R filings for Electric Boat Corp, spanning 2019–2024. Each annual total aggregates on-site air emissions, surface-water discharges, land disposal, and off-site transfers reported by the facility under EPCRA Section 313, which requires disclosure whenever a listed chemical is manufactured, processed, or otherwise used above threshold quantities.
Reported releases opened at 18.9K in 2019 and closed at 10.1K in 2024 – a decrease of 46.5% over the window. The chart below stacks the four TRI release media (air, water, land, off-site) and overlays the yearly total. The top contributor by cumulative mass is Diisocyanates at 122.9K, followed by Lead at 36.3K.
Because TRI figures are estimated, not metered, year-over-year deltas can reflect methodology revisions, ownership changes, or shifts in what a facility classifies as reportable, not only physical emission changes. Treat the trajectory as a disclosure record, and cross-reference with the EPA Enforcement and Compliance History Online (ECHO) system for the fuller regulatory picture on this transportation equipment facility.
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.
Total Releases by Category
Year-over-Year Comparison
| Year | Total | Chemicals | YoY Change |
|---|---|---|---|
| 2019 | 18.9K lbs | 6 | - |
| 2020 | 50.6K lbs | 6 | +168.1% |
| 2021 | 66.1K lbs | 6 | +30.6% |
| 2022 | 19.7K lbs | 6 | -70.2% |
| 2023 | 11.0K lbs | 6 | -44.3% |
| 2024 | 10.1K lbs | 6 | -7.9% |
Top Chemicals by Year
| Chemical | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | Total |
|---|---|---|---|---|---|---|---|
| Diisocyanates | 10.8K | 34.2K | 50.9K | 13.2K | 7.3K | 6.4K | 122.9K |
| Lead | 7.9K | 11.3K | 11.8K | 3.5K | 1.1K | 799 | 36.3K |
| Nickel | 11 | 3.6K | 1.8K | 2.0K | 2.1K | 2.3K | 11.9K |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | - | - | 1.5K | 900 | 370 | 487 | 3.3K |
| Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 77 | 1.4K | - | - | - | - | 1.5K |
| Copper compounds | - | - | 78 | 63 | 47 | 70 | 258 |
| Copper And Copper Compounds | 68 | 54 | - | - | - | - | 122 |
| Manganese compounds | - | - | 9 | 9 | 12 | 55 | 86 |
| Manganese And Manganese Compounds | 11 | 12 | - | - | - | - | 23 |
About This Data
Trend data is sourced from the EPA Toxic Release Inventory (TRI). Facilities report annually. Release quantities are self-reported estimates. Year-over-year changes may reflect changes in production, pollution control measures, reporting methodology, or chemical thresholds.
A decrease in reported releases does not necessarily indicate improved environmental performance, as it may reflect production cutbacks, facility closures, or changes in reporting requirements. Similarly, increases may reflect expanded production rather than degraded environmental practices.
Frequently Asked Questions
Is Electric Boat Corp getting cleaner or dirtier? ▼
What time period does this trend data cover? ▼
Read our methodology - how this data is sourced, computed, and verified.